diff --git a/module/gitlab/control.php b/module/gitlab/control.php
index 2d6917d7e2..363d551703 100644
--- a/module/gitlab/control.php
+++ b/module/gitlab/control.php
@@ -486,7 +486,7 @@ class gitlab extends control
     }
 
     /**
-     * Browse gitlab project.
+     * Browse gitlab user.
      *
      * @param  int     $gitlabID
      * @access public
@@ -501,7 +501,7 @@ class gitlab extends control
     }
 
     /**
-     * Creat a gitlab project.
+     * Creat a gitlab user.
      *
      * @param  int     $gitlabID
      * @access public
diff --git a/module/gitlab/model.php b/module/gitlab/model.php
index 5581bf454e..df57a31ebd 100644
--- a/module/gitlab/model.php
+++ b/module/gitlab/model.php
@@ -2186,4 +2186,17 @@ class gitlabModel extends model
         return false;
     }
 
+    /**
+     * Get products which scm is GitLab by projects.
+     *
+     * @param  array $projectIDs
+     * @return array
+     */
+    public function getProductsByProjects($projectIDs)
+    {
+        return $this->dao->select('path,product')->from(TABLE_REPO)->where('deleted')->eq('0')
+            ->andWhere('SCM')->eq('Gitlab')
+            ->andWhere('path')->in($projectIDs)
+            ->fetchPairs('path', 'product');
+    }
 }
diff --git a/module/mr/control.php b/module/mr/control.php
index 86a7db6f1a..40196a980d 100644
--- a/module/mr/control.php
+++ b/module/mr/control.php
@@ -389,6 +389,333 @@ class mr extends control
         return $this->send($this->mr->reopen($MR));
     }
 
+    /**
+     * link MR list.
+     *
+     * @param  int    $MRID
+     * @param  string $type
+     * @param  string $orderBy
+     * @param  string $link
+     * @param  string $param
+     * @param  int    $recTotal
+     * @param  int    $recPerPage
+     * @param  int    $pageID
+     * @return void
+     */
+    public function link($MRID, $type = 'story', $orderBy = 'id_desc', $link = 'false', $param = '', $recTotal = 0, $recPerPage = 100, $pageID = 1)
+    {
+        $this->app->loadLang('productplan');
+        $this->app->loadLang('bug');
+        $this->app->loadLang('task');
+
+        $MR       = $this->mr->getByID($MRID);
+        $products = $this->loadModel('gitlab')->getProductsByProjects(array($MR->targetProject, $MR->sourceProject));
+        $product  = $this->loadModel('product')->getById(array_shift($products));
+
+        /* Load pager. */
+        $this->app->loadClass('pager', $static     = true);
+        $storyPager = new pager(0, $recPerPage, $type == 'story' ? $pageID : 1);
+        $bugPager   = new pager(0, $recPerPage, $type == 'bug' ? $pageID : 1);
+        $taskPager  = new pager(0, $recPerPage, $type == 'task' ? $pageID : 1);
+
+        $stories = $this->mr->getLinkList($MRID, $product->id, 'story', $orderBy, $storyPager);
+        $bugs    = $this->mr->getLinkList($MRID, $product->id, 'bug', $orderBy, $bugPager);
+        $tasks   = $this->mr->getLinkList($MRID, $product->id, 'task', $orderBy, $taskPager);
+
+        $this->view->MR           = $MR;
+        $this->view->canBeChanged = true;
+        $this->view->modulePairs  = $this->loadModel('tree')->getOptionMenu($product->id, 'story');
+        $this->view->users        = $this->loadModel('user')->getPairs('noletter');
+        $this->view->stories      = $stories;
+        $this->view->summary      = $this->product->summary($stories);
+        $this->view->bugs         = $bugs;
+        $this->view->tasks        = $tasks;
+        $this->view->products     = $products;
+        $this->view->product      = $product;
+        $this->view->storyPager   = $storyPager;
+        $this->view->bugPager     = $bugPager;
+        $this->view->taskPager    = $taskPager;
+        $this->view->type         = $type;
+        $this->view->orderBy      = $orderBy;
+        $this->view->link         = $link;
+        $this->view->param        = $param;
+        $this->display();
+    }
+
+    /**
+     * Link story to mr.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $browseType
+     * @param int    $param
+     * @param string $orderBy
+     * @param int    $recTotal
+     * @param int    $recPerPage
+     * @param int    $pageID
+     * @access public
+     * @return void
+     */
+    public function linkStory($MRID, $productID = 0, $browseType = '', $param = 0, $orderBy = 'id_desc', $recTotal = 0, $recPerPage = 100, $pageID = 1)
+    {
+        if(!empty($_POST['stories']))
+        {
+            $this->mr->link($MRID, $productID, 'story');
+            die(js::locate(inlink('link', "MRID=$MRID&type=story&orderBy=$orderBy"), 'parent'));
+        }
+
+        $this->loadModel('story');
+        $this->app->loadLang('productplan');
+
+        $product = $this->loadModel('product')->getById($productID);
+        $modules = $this->loadModel('tree')->getOptionMenu($productID, $viewType = 'story');
+
+        /* Build search form. */
+        $storyStatusList = $this->lang->story->statusList;
+        unset($storyStatusList['closed']);
+        $queryID         = ($browseType == 'bySearch') ? (int) $param : 0;
+
+        unset($this->config->product->search['fields']['product']);
+        $this->config->product->search['actionURL']                   = $this->createLink('mr', 'link', "$MRID=$MRID&type=story&orderBy=$orderBy&link=true&param=" . helper::safe64Encode('&browseType=bySearch&queryID=myQueryID'));
+        $this->config->product->search['queryID']                     = $queryID;
+        $this->config->product->search['style']                       = 'simple';
+        $this->config->product->search['params']['product']['values'] = array($product) + array('all' => $this->lang->product->allProductsOfProject);
+        $this->config->product->search['params']['plan']['values']    = $this->loadModel('productplan')->getForProducts(array($productID => $productID));
+        $this->config->product->search['params']['module']['values']  = $modules;
+        $this->config->product->search['params']['status']            = array('operator' => '=', 'control' => 'select', 'values' => $storyStatusList);
+
+        if($this->session->currentProductType == 'normal')
+        {
+            unset($this->config->product->search['fields']['branch']);
+            unset($this->config->product->search['params']['branch']);
+        }
+        else
+        {
+            $this->config->product->search['fields']['branch']           = $this->lang->product->branch;
+            $branches                                                    = array('' => '') + $this->loadModel('branch')->getPairs($productID, 'noempty');
+            $this->config->product->search['params']['branch']['values'] = $branches;
+        }
+        $this->loadModel('search')->setSearchParams($this->config->product->search);
+
+        $MR             = $this->mr->getByID($MRID);
+        $relatedStories = $this->mr->getCommitedLink($MR->gitlabID, $MR->targetProject, $MR->mriid, 'story');
+
+        $linkedStories = $this->mr->getLinkList($MRID, $product->id, '', 'story');
+        if($browseType == 'bySearch')
+        {
+            $allStories = $this->story->getBySearch($productID, 0, $queryID, 'id', '', 'story', array_keys($linkedStories), null);
+        }
+        else
+        {
+            $allStories = $this->story->getProductStories($productID, 0, $moduleID   = '0', $status     = 'draft,active,changed', 'story', 'id_desc', $hasParent  = false, array_keys($linkedStories), null);
+        }
+
+        $this->view->modules        = $modules;
+        $this->view->users          = $this->loadModel('user')->getPairs('noletter');
+        $this->view->allStories     = $allStories;
+        $this->view->relatedStories = $relatedStories;
+        $this->view->product        = $product;
+        $this->view->MRID           = $MRID;
+        $this->view->browseType     = $browseType;
+        $this->view->param          = $param;
+        $this->view->orderBy        = $orderBy;
+        $this->display();
+    }
+
+    /**
+     * Link bug to mr.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $browseType
+     * @param int    $param
+     * @param string $orderBy
+     * @param int    $recTotal
+     * @param int    $recPerPage
+     * @param int    $pageID
+     * @access public
+     * @return void
+     */
+    public function linkBug($MRID, $productID = 0, $browseType = '', $param = 0, $orderBy = 'id_desc', $recTotal = 0, $recPerPage = 100, $pageID = 1)
+    {
+        if(!empty($_POST['bugs']))
+        {
+            $this->mr->link($MRID, $productID, 'bug');
+            die(js::locate(inlink('link', "MRID=$MRID&type=bug&orderBy=$orderBy"), 'parent'));
+        }
+
+        $this->loadModel('bug');
+        $this->app->loadLang('productplan');
+        $queryID = ($browseType == 'bysearch') ? (int)$param : 0;
+
+        $product = $this->loadModel('product')->getById($productID);
+        $modules = $this->loadModel('tree')->getOptionMenu($productID, $viewType = 'bug');
+
+        /* Build search form. */
+        $this->config->bug->search['actionURL']                         = $this->createLink('mr', 'link', "$MRID=$MRID&type=bug&orderBy=$orderBy&link=true&param=" . helper::safe64Encode('&browseType=bySearch&queryID=myQueryID'));
+        $this->config->bug->search['queryID']                           = $queryID;
+        $this->config->bug->search['style']                             = 'simple';
+        $this->config->bug->search['params']['plan']['values']          = $this->loadModel('productplan')->getForProducts(array($productID => $productID));
+        $this->config->bug->search['params']['module']['values']        = $modules;
+        $this->config->bug->search['params']['project']['values']       = $this->product->getExecutionPairsByProduct($productID);
+        $this->config->bug->search['params']['openedBuild']['values']   = $this->loadModel('build')->getProductBuildPairs($productID, $branch                                                         = 0, $params                                                         = '');
+        $this->config->bug->search['params']['resolvedBuild']['values'] = $this->loadModel('build')->getProductBuildPairs($productID, $branch                                                         = 0, $params                                                         = '');
+
+        unset($this->config->bug->search['fields']['product']);
+        if($this->session->currentProductType == 'normal')
+        {
+            unset($this->config->bug->search['fields']['branch']);
+            unset($this->config->bug->search['params']['branch']);
+        }
+        else
+        {
+            $this->config->bug->search['fields']['branch']           = $this->lang->product->branch;
+            $branches                                                = array('' => '') + $this->loadModel('branch')->getPairs($productID, 'noempty');
+            $this->config->bug->search['params']['branch']['values'] = $branches;
+        }
+        $this->loadModel('search')->setSearchParams($this->config->bug->search);
+
+        $MR          = $this->mr->getByID($MRID);
+        $relatedBugs = $this->mr->getCommitedLink($MR->gitlabID, $MR->targetProject, $MR->mriid, 'bug');
+
+        $linkedBugs = $this->mr->getLinkList($MRID, $product->id, '','bug');
+        if($browseType == 'bySearch')
+        {
+            $allBugs = $this->bug->getBySearch($productID, 0, $queryID, 'id_desc', array_keys($linkedBugs), null);
+        }
+        else
+        {
+            $allBugs = $this->bug->getActiveBugs($productID, 0, '0', array_keys($linkedBugs), null);
+        }
+
+        $this->view->modules     = $modules;
+        $this->view->users       = $this->loadModel('user')->getPairs('noletter');
+        $this->view->allBugs     = $allBugs;
+        $this->view->relatedBugs = $relatedBugs;
+        $this->view->product     = $product;
+        $this->view->MRID        = $MRID;
+        $this->view->browseType  = $browseType;
+        $this->view->param       = $param;
+        $this->view->orderBy     = $orderBy;
+        $this->display();
+    }
+
+    /**
+     * Link task to mr.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $browseType
+     * @param int    $param
+     * @param string $orderBy
+     * @param int    $recTotal
+     * @param int    $recPerPage
+     * @param int    $pageID
+     * @access public
+     * @return void
+     */
+    public function linkTask($MRID, $productID = 0, $browseType = 'unclosed', $param = 0, $orderBy = 'id_desc', $recTotal = 0, $recPerPage = 100, $pageID = 1)
+    {
+        if(!empty($_POST['tasks']))
+        {
+            $this->mr->link($MRID, $productID, 'task');
+            die(js::locate(inlink('link', "MRID=$MRID&type=task&orderBy=$orderBy"), 'parent'));
+        }
+
+        $this->loadModel('execution');
+        $this->loadModel('product');
+        $this->app->loadLang('task');
+
+        /* Set browse type. */
+        $browseType = strtolower($browseType);
+        $queryID = ($browseType == 'bysearch') ? (int)$param : 0;
+
+        $product = $this->loadModel('product')->getById($productID);
+        $modules = $this->loadModel('tree')->getOptionMenu($productID, $viewType = 'task');
+
+        /* Build search form. */
+        $this->config->execution->search['actionURL']                  = $this->createLink('mr', 'link', "$MRID=$MRID&type=task&orderBy=$orderBy&link=true&param=" . helper::safe64Encode('&browseType=bySearch&queryID=myQueryID'));
+        $this->config->execution->search['queryID']                    = $queryID;
+        $this->config->execution->search['params']['module']['values'] = $modules;
+        $this->loadModel('search')->setSearchParams($this->config->execution->search);
+
+        $MR           = $this->mr->getByID($MRID);
+        $relatedTasks = $this->mr->getCommitedLink($MR->gitlabID, $MR->targetProject, $MR->mriid, 'task');
+        $linkedTasks  = $this->mr->getLinkList($MRID, $product->id, '','task');
+
+        /* Get executions by product. */
+        $productExecutions   = $this->product->getExecutionPairsByProduct($productID);
+        $productExecutionIDs = array_filter(array_keys($productExecutions));
+        $this->config->execution->search['params']['execution']['values'] = array_filter($productExecutions);
+
+        /* Get tasks by executions. */
+        $allTasks = array();
+        foreach($productExecutionIDs as $productExecutionID)
+        {
+            $tasks    = $this->execution->getTasks(0, $productExecutionID, array(), $browseType, $queryID, 0, $orderBy, null);
+            $allTasks = array_merge($tasks, $allTasks);
+        }
+        /* Filter linked tasks. */
+        $linkedTaskIDs = array_keys($linkedTasks);
+        foreach($allTasks as $key => $task)
+        {
+            if(in_array($task->id, $linkedTaskIDs)) unset($allTasks[$key]);
+        }
+
+        $this->view->modules      = $modules;
+        $this->view->users        = $this->loadModel('user')->getPairs('noletter');
+        $this->view->allTasks     = $allTasks;
+        $this->view->relatedTasks = $relatedTasks;
+        $this->view->product      = $product;
+        $this->view->MRID         = $MRID;
+        $this->view->browseType   = $browseType;
+        $this->view->param        = $param;
+        $this->view->orderBy      = $orderBy;
+        $this->display();
+    }
+
+    /**
+     * UnLink an mr link.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $type
+     * @param int    $linkID
+     * @param string $confirm
+     * @access public
+     * @return mix
+     */
+    public function unlink($MRID, $productID, $type, $linkID, $confirm = 'no')
+    {
+        $this->app->loadLang('productplan');
+
+        if($confirm == 'no')
+        {
+            die(js::confirm($this->lang->productplan->confirmUnlinkStory, $this->createLink('mr', 'unlink', "MRID=$MRID&productID=$productID&linkID=$linkID&type=$type&confirm=yes")));
+        }
+        else
+        {
+            $this->mr->unlink($MRID, $productID, $type, $linkID);
+
+            /* if ajax request, send result. */
+            if($this->server->ajax)
+            {
+                if(dao::isError())
+                {
+                    $response['result']  = 'fail';
+                    $response['message'] = dao::getError();
+                }
+                else
+                {
+                    $response['result']  = 'success';
+                    $response['message'] = '';
+                }
+                return $this->send($response);
+            }
+            die(js::reload('parent'));
+        }
+    }
+
     /**
      * Add a Bug for this review.
      *
diff --git a/module/mr/css/link.css b/module/mr/css/link.css
new file mode 100644
index 0000000000..3a10e0993b
--- /dev/null
+++ b/module/mr/css/link.css
@@ -0,0 +1,25 @@
+#storyList th {border: none;}
+#bugList th {border: none;}
+#taskList th {border: none;}
+.hide-side .col-main {width: 100%;}
+.hide-side .col-side .main-side {width: 0; display: none;}
+
+.dropdown-menu.with-search {padding: 0; min-width: 150px; overflow: hidden; max-height: 302px;}
+.dropdown-menu > .menu-search .input-group {width: 100%;}
+.dropdown-menu > .menu-search .input-group-addon {position: absolute; right: 10px; top: 0; z-index: 10; background: none; border: none; color: #666;}
+.dropdown-menu > .menu-search .form-control {border: none !important; box-shadow: none !important; border-top: 1px solid #ddd !important;}
+.dropdown-list {display: block; padding: 0; max-height: 270px; overflow-y: auto;}
+.dropdown-list > li > a {display: block; padding: 3px 20px; clear: both; font-weight: normal; line-height: 1.53846154; color: #141414; white-space: nowrap;}
+.dropdown-list > li > a:hover,
+.dropdown-list > li > a:focus {color: #1a4f85; text-decoration: none; background-color: #ddd;}
+
+.checkbox.btn {margin-top: 0px;}
+
+.linkBox #queryBox .search-form .form-actions {padding-bottom: 5px;}
+.linkBox .table-header {padding: 8px 15px; border-bottom: 1px solid #cbd0db;}
+#unlinkStoryList, #unlinkBugList, #unlinkTaskList{border-top: 1px solid #cbd0db;}
+.fixed-footer .text {color: #fff;}
+ol, ul {padding-left: 20px;}
+#tabsNav .tab-pane>.main-table {border-radius: 0;}
+.body-modal #mainMenu>.btn-toolbar {width: auto;}
+.body-modal #mainContent {min-height: 240px;}
diff --git a/module/mr/js/link.js b/module/mr/js/link.js
new file mode 100644
index 0000000000..343413fbf9
--- /dev/null
+++ b/module/mr/js/link.js
@@ -0,0 +1,86 @@
+function showLink(productID, type, orderBy, param)
+{
+    if(type == 'story')     method = 'linkStory';
+    else if(type == 'bug')  method = 'linkBug';
+    else if(type == 'task') method = 'linkTask';
+
+    loadURL(createLink('mr', method, 'MRID=' + MRID + '&productID=' + productID + (typeof(param) == 'undefined' ? '' : param) + (typeof(orderBy) == 'undefined' ? '' : "&orderBy=" + orderBy)), type);
+
+    $('.actions').find("a[href*='" + type + "']").addClass('hidden');
+}
+
+/**
+ * Load URL.
+ *
+ * @param  string $url
+ * @param  string $type
+ * @access public
+ * @return void
+ */
+function loadURL(url, type)
+{
+    $.get(url, function(data)
+    {
+        var $pane = $(type == 'story' ? '#stories' : (type == 'bug' ? '#bugs' : '#tasks'));
+        $pane.find('.main-table').hide();
+        var $linkBox = $pane.find('.linkBox').html(data).removeClass('hidden');
+        $linkBox.html(data).removeClass('hidden');
+        $linkBox.find('[data-ride="table"]').table();
+        $linkBox.find('[data-ride="pager"]').pager();
+        $linkBox.find('[data-ride="pager"] li a.pager-item').click(function()
+        {
+            loadURL($(this).attr('href'), type);
+            return false;
+        });
+        $linkBox.find('[data-ride="pager"] .pager-size-menu a[data-size]').off('click');
+        $linkBox.find('[data-ride="pager"] .pager-size-menu a[data-size]').click(function()
+        {
+            line = $linkBox.find('[data-ride="pager"]').attr('data-link-creator');
+            line = line.replace('{recPerPage}', $(this).attr('data-size')).replace('{page}', $linkBox.find('[data-ride="pager"]').attr('data-page'));
+            $.cookie($linkBox.find('[data-ride="pager"]').attr('data-page-cookie'), $(this).attr('data-size'), {expires:config.cookieLife, path:config.webRoot});
+            loadURL(line, type);
+            return false;
+        });
+        $.toggleQueryBox(true, $linkBox.find('#queryBox'));
+    });
+}
+
+$(function()
+{
+    if(link == 'true') showLink(productID, type, orderBy, param);
+    var infoShowed = false;
+    $('.nav.nav-tabs a[data-toggle="tab"]').on('shown.zui.tab', function(e)
+    {
+        var href = $(e.target).attr('href');
+        var tabPane = $(href + '.tab-pane');
+        if(tabPane.size() == 0) return;
+        var formID = tabPane.find('.linkBox').find('form:last');
+        if(formID.size() == 0) formID = tabPane.find('form:last');
+        if(href == '#planInfo' && !infoShowed)
+        {
+            $('#planInfo img').each(function()
+            {
+                var $tr = $('#planInfo .detail-content .table-data tbody tr:first');
+                width   = $tr.width() - $tr.find('th').width();
+                if($(this).parent().prop('tagName').toLowerCase() == 'a') $(this).unwrap();
+                setImageSize($(this), width, 0);
+            });
+
+            infoShowed = true;
+        }
+    });
+
+    $('#storyList').on('sort.sortable', function(e, data)
+    {
+        var list = '';
+        for(i = 0; i < data.list.length; i++) list += $(data.list[i].item).attr('data-id') + ',';
+        $.post(createLink('productplan', 'ajaxStorySort', 'productID=' + productID), {'stories' : list, 'orderBy' : orderBy, 'pageID' : storyPageID, 'recPerPage' : storyRecPerPage, 'recTotal' : storyRecTotal}, function()
+        {
+            var $target = $(data.element[0]);
+            $target.hide();
+            $target.fadeIn(1000);
+            order = 'order_asc';
+            history.pushState({}, 0, createLink('productplan', 'view', "productID=" + productID + '&type=story&orderBy=' + order));
+        });
+    });
+});
diff --git a/module/mr/lang/en.php b/module/mr/lang/en.php
index eeb7a6dc78..b2706bcaa3 100644
--- a/module/mr/lang/en.php
+++ b/module/mr/lang/en.php
@@ -12,6 +12,7 @@ $lang->mr->source       = 'source';
 $lang->mr->target       = 'target';
 $lang->mr->viewDiff     = 'View diff';
 $lang->mr->viewInGitlab = 'View in GitLab';
+$lang->mr->link         = 'Link stories,bugs,tasks';
 
 $lang->mr->id          = 'ID';
 $lang->mr->mriid       = "raw MR ID";
@@ -141,3 +142,10 @@ $lang->mr->commandDocument = <<< EOD
 EOD;
 
 $lang->mr->noChanges = "Currently there are no changes in this merge request's source branch. Please push new commits or use a different branch.";
+
+$lang->mr->linkTask          = "Link task";
+$lang->mr->unlinkTask        = "Remove task";
+$lang->mr->linkedTasks       = 'Task';
+$lang->mr->unlinkedTasks     = 'Task not linked';
+$lang->mr->confirmUnlinkTask = "Are you sure to remove this task?";
+$lang->mr->taskSummary       = "There are <strong>%s</strong> tasks on this page";
\ No newline at end of file
diff --git a/module/mr/lang/zh-cn.php b/module/mr/lang/zh-cn.php
index 5a971d6bd4..5345936511 100644
--- a/module/mr/lang/zh-cn.php
+++ b/module/mr/lang/zh-cn.php
@@ -12,6 +12,7 @@ $lang->mr->source       = '源项目分支';
 $lang->mr->target       = '目标项目分支';
 $lang->mr->viewDiff     = '比对代码';
 $lang->mr->viewInGitlab = '在GitLab查看';
+$lang->mr->link         = '关联需求、bug、任务';
 
 $lang->mr->id          = 'ID';
 $lang->mr->mriid       = "MR原始ID";
@@ -141,3 +142,10 @@ $lang->mr->commandDocument = <<< EOD
 EOD;
 
 $lang->mr->noChanges = "目前在这个合并请求的源分支中没有变化，请推送新的提交或使用不同的分支。";
+
+$lang->mr->linkTask          = "关联任务";
+$lang->mr->unlinkTask        = "移除任务";
+$lang->mr->linkedTasks       = '任务';
+$lang->mr->unlinkedTasks     = '未关联任务';
+$lang->mr->confirmUnlinkTask = "您确认移除该任务吗？";
+$lang->mr->taskSummary       = "本页共 <strong>%s</strong> 个任务";
diff --git a/module/mr/model.php b/module/mr/model.php
index 6787228352..4b5d5ba981 100644
--- a/module/mr/model.php
+++ b/module/mr/model.php
@@ -697,6 +697,21 @@ class mrModel extends model
         return json_decode(commonModel::http($url));
     }
 
+    /**
+     * Get diff commits of MR from GitLab API.
+     *
+     * @param  int    $gitlabID
+     * @param  int    $projectID
+     * @param  int    $MRID
+     * @access public
+     * @return object
+     */
+    public function apiGetDiffCommits($gitlabID, $projectID, $MRID)
+    {
+        $url = sprintf($this->gitlab->getApiRoot($gitlabID), "/projects/$projectID/merge_requests/$MRID/commits");
+        return json_decode(commonModel::http($url));
+    }
+
     /**
      * Reject or Approve this MR.
      *
@@ -972,4 +987,130 @@ class mrModel extends model
         return $this->dao->select('*')->from(TABLE_BUG)->where('entry')->eq($entry)->orderby('id_desc')->fetch();
     }
 
+    /**
+     * Get mr link list.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $type
+     * @param string $orderBy
+     * @param object $pager
+     * @access public
+     * @return array
+     */
+    public function getLinkList($MRID, $productID, $type, $orderBy, $pager = null)
+    {
+        $linkIDs = $this->dao->select('BID')->from(TABLE_RELATION)
+            ->where('product')->eq($productID)
+            ->andWhere('relation')->eq('interrated')
+            ->andWhere('AType')->eq('mr')
+            ->andWhere('AID')->eq($MRID)
+            ->andWhere('BType')->eq($type)
+            ->fetchPairs('BID');
+
+        $links = array();
+        if($type == 'story' and !empty($linkIDs))
+        {
+            $orderBy = str_replace('name_', 'title_', $orderBy);
+            $links = $this->dao->select('t1.*, t2.spec, t2.verify, t3.name as productTitle')
+                ->from(TABLE_STORY)->alias('t1')
+                ->leftJoin(TABLE_STORYSPEC)->alias('t2')->on('t1.id=t2.story')
+                ->leftJoin(TABLE_PRODUCT)->alias('t3')->on('t1.product=t3.id')
+                ->where('t1.deleted')->eq(0)
+                ->andWhere('t1.version=t2.version')
+                ->andWhere('t1.id')->in($linkIDs)
+                ->orderBy($orderBy)
+                ->page($pager)
+                ->fetchAll('id');
+        }
+        if($type == 'bug' and !empty($linkIDs))
+        {
+            $orderBy = str_replace('name_', 'title_', $orderBy);
+            $links = $this->dao->select('*')->from(TABLE_BUG)
+                ->where('deleted')->eq(0)
+                ->andWhere('id')->in($linkIDs)
+                ->orderBy($orderBy)
+                ->page($pager)
+                ->fetchAll('id');
+        }
+        if($type == 'task' and !empty($linkIDs))
+        {
+            $orderBy = str_replace('title_', 'name_', $orderBy);
+            $links = $this->dao->select('*')->from(TABLE_TASK)
+                ->where('deleted')->eq(0)
+                ->andWhere('id')->in($linkIDs)
+                ->orderBy($orderBy)
+                ->page($pager)
+                ->fetchAll('id');
+        }
+
+        return $links;
+    }
+
+    /**
+     * Create an mr link.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $type
+     * @access public
+     * @return void
+     */
+    public function link($MRID, $productID, $type)
+    {
+        if($type == 'story') $links = $this->post->stories;
+        if($type == 'bug') $links = $this->post->bugs;
+        if($type == 'task') $links = $this->post->tasks;
+
+        foreach($links as $linkID)
+        {
+            $relation           = new stdclass;
+            $relation->product  = $productID;
+            $relation->AType    = 'mr';
+            $relation->AID      = $MRID;
+            $relation->relation = 'interrated';
+            $relation->BType    = $type;
+            $relation->BID      = $linkID;
+
+            $this->dao->replace(TABLE_RELATION)->data($relation)->exec();
+        }
+    }
+
+    /**
+     * unLink an mr link.
+     *
+     * @param int    $MRID
+     * @param int    $productID
+     * @param string $type
+     * @param int    $linkID
+     * @access public
+     * @return void
+     */
+    public function unlink($MRID, $productID, $type, $linkID)
+    {
+        return $this->dao->delete()->from(TABLE_RELATION)->where('product')->eq($productID)->andWhere('AType')->eq('mr')->andWhere('AID')->eq($MRID)->andWhere('BType')->eq($type)->andWhere('BID')->eq($linkID)->exec();
+    }
+
+    /**
+     * Get links by mr commites.
+     *
+     * @param int    $gitlabID
+     * @param int    $projectID
+     * @param int    $MRID
+     * @param string $type
+     * @access public
+     * @return array
+     */
+    public function getCommitedLink($gitlabID, $projectID, $MRID, $type)
+    {
+        $DiffCommits = $this->apiGetDiffCommits($gitlabID, $projectID, $MRID);
+
+        $commits = array();
+        foreach($DiffCommits as $DiffCommit)
+        {
+            $commits[] = substr($DiffCommit->id, 0, 10);
+        }
+
+        return $this->dao->select('objectID')->from(TABLE_ACTION)->where('objectType')->eq($type)->andWhere('extra')->in($commits)->fetchPairs('objectID');
+    }
 }
diff --git a/module/mr/view/browse.html.php b/module/mr/view/browse.html.php
index 06733d6f26..10e9b3cd4f 100644
--- a/module/mr/view/browse.html.php
+++ b/module/mr/view/browse.html.php
@@ -79,6 +79,7 @@
             common::printLink('mr', 'view',   "mr={$MR->id}", '<i class="icon icon-eye"></i>', '', "title='{$lang->mr->view}' class='btn btn-info'");
             common::printLink('mr', 'edit',   "mr={$MR->id}", '<i class="icon icon-edit"></i>', '', "title='{$lang->mr->edit}' class='btn btn-info'");
             common::printLink('mr', 'diff',   "mr={$MR->id}", '<i class="icon icon-review"></i>', '', "title='{$lang->mr->viewDiff}' class='btn btn-info'");
+            common::printLink('mr', 'link',   "mr={$MR->id}", '<i class="icon icon-link"></i>', '', "title='{$lang->mr->link}' class='btn btn-info'");
             common::printLink('mr', 'delete', "mr={$MR->id}", '<i class="icon icon-trash"></i>', 'hiddenwin', "title='{$lang->mr->delete}' class='btn btn-info'");
             ?>
           </td>
diff --git a/module/mr/view/link.html.php b/module/mr/view/link.html.php
new file mode 100644
index 0000000000..0bfb3dfe9e
--- /dev/null
+++ b/module/mr/view/link.html.php
@@ -0,0 +1,270 @@
+<?php
+/**
+ * The view of productplan module of ZenTaoPMS.
+ *
+ * @copyright   Copyright 2009-2021 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
+ * @license     ZPL (http://zpl.pub/page/zplv12.html)
+ * @author      gang zeng
+ * @package     repo
+ * @version     $Id: link.html.php $
+ * @link        http://www.zentao.net
+ */
+?>
+<?php include '../../common/view/header.html.php';?>
+<?php include '../../common/view/sortable.html.php';?>
+<?php include '../../common/view/tablesorter.html.php';?>
+<?php js::set('confirmUnlinkStory', $lang->productplan->confirmUnlinkStory)?>
+<?php js::set('confirmUnlinkBug', $lang->productplan->confirmUnlinkBug)?>
+<?php js::set('confirmUnlinkTask', $lang->mr->confirmUnlinkTask)?>
+<?php js::set('productID', $product->id);?>
+<?php js::set('MRID', $MR->id);?>
+<?php js::set('storyPageID', $storyPager->pageID);?>
+<?php js::set('storyRecPerPage', $storyPager->recPerPage);?>
+<?php js::set('storyRecTotal', $storyPager->recTotal);?>
+<div id='mainMenu' class='clearfix'>
+  <div class='btn-toolbar pull-left'>
+    <?php common::printBack(inlink('browse'), 'btn btn-primary');?>
+    <div class='divider'></div>
+    <div class='page-title'>
+      <span class='label label-id'><?php echo $MR->id;?></span>
+      <span title='<?php echo $MR->title;?>' class='text'><?php echo $MR->title;?></span>
+      <?php if($product->type !== 'normal') echo "<span title='{$lang->product->branchName[$product->type]}' class='label label-branch label-badge'>" . $branches[$branch] . '</span>';?>
+      <?php if($MR->deleted):?>
+      <span class='label label-danger'><?php echo $lang->product->deleted;?></span>
+      <?php endif; ?>
+    </div>
+  </div>
+
+</div>
+<div id='mainContent' class='main-content'>
+  <div class='tabs' id='tabsNav'>
+    <ul class='nav nav-tabs'>
+      <li class='<?php if($type == 'story') echo 'active'?>'><a href='#stories' data-toggle='tab'><?php echo  html::icon($lang->icons['story'], 'text-primary') . ' ' . $lang->productplan->linkedStories;?></a></li>
+      <li class='<?php if($type == 'bug') echo 'active'?>'><a href='#bugs' data-toggle='tab'><?php echo  html::icon($lang->icons['bug'], 'text-red') . ' ' . $lang->productplan->linkedBugs;?></a></li>
+      <li class='<?php if($type == 'task') echo 'active'?>'><a href='#tasks' data-toggle='tab'><?php echo  html::icon('todo', 'text-info') . ' ' . $lang->mr->linkedTasks;?></a></li>
+    </ul>
+    <div class='tab-content'>
+      <div id='stories' class='tab-pane <?php if($type == 'story') echo 'active'?>'>
+        <?php $canOrder = false;?>
+        <div class='actions'>
+          <?php echo html::a("javascript:showLink($product->id, \"story\")", '<i class="icon-link"></i> ' . $lang->productplan->linkStory, '', "class='btn btn-primary'");?>
+        </div>
+        <div class='linkBox cell hidden'></div>
+        <form class='main-table table-story' data-ride='table' method='post' target='hiddenwin' action="<?php echo inlink('batchUnlinkStory', "planID=$MR->id&orderBy=$orderBy");?>">
+          <table class='table has-sort-head' id='storyList'>
+            <?php
+            $canBatchClose        = common::hasPriv('story', 'batchClose');
+            $canBatchEdit         = common::hasPriv('story', 'batchEdit');
+            $canBatchReview       = common::hasPriv('story', 'batchReview');
+            $canBatchChangeBranch = common::hasPriv('story', 'batchChangeBranch');
+            $canBatchChangeModule = common::hasPriv('story', 'batchChangeModule');
+            $canBatchChangePlan   = common::hasPriv('story', 'batchChangePlan');
+            $canBatchChangeStage  = common::hasPriv('story', 'batchChangeStage');
+            $canBatchAssignTo     = common::hasPriv('story', 'batchAssignTo');
+
+            $vars = "MRID={$MR->id}&type=story&orderBy=%s&link=$link&param=$param";
+            ?>
+            <thead>
+              <tr class='text-center'>
+                <th class='c-id text-left'>
+                  <?php common::printOrderLink('id', $orderBy, $vars, $lang->idAB);?>
+                </th>
+                <?php if($canOrder):?>
+                <th class='w-70px'><?php common::printOrderLink('order', $orderBy, $vars, $lang->productplan->updateOrder);?></th>
+                <?php endif;?>
+                <th class='w-70px'> <?php common::printOrderLink('pri',        $orderBy, $vars, $lang->priAB);?></th>
+                <th class='w-150px text-left'><?php common::printOrderLink('module',     $orderBy, $vars, $lang->story->module);?></th>
+                <th class='text-left'><?php common::printOrderLink('title',      $orderBy, $vars, $lang->story->title);?></th>
+                <th class='c-user'> <?php common::printOrderLink('openedBy',   $orderBy, $vars, $lang->openedByAB);?></th>
+                <th class='c-user'> <?php common::printOrderLink('assignedTo', $orderBy, $vars, $lang->assignedToAB);?></th>
+                <th class='w-70px text-right'> <?php common::printOrderLink('estimate',   $orderBy, $vars, $lang->story->estimateAB);?></th>
+                <th class='w-70px'> <?php common::printOrderLink('status',     $orderBy, $vars, $lang->statusAB);?></th>
+                <th class='w-80px'> <?php common::printOrderLink('stage',      $orderBy, $vars, $lang->story->stageAB);?></th>
+                <th class='c-actions-1'> <?php echo $lang->actions?></th>
+              </tr>
+            </thead>
+            <tbody class='sortable text-center'>
+              <?php
+              $totalEstimate = 0.0;
+              ?>
+              <?php foreach($stories as $story):?>
+              <?php
+              $viewLink = $this->createLink('story', 'view', "storyID=$story->id");
+              $totalEstimate += $story->estimate;
+              ?>
+              <tr data-id='<?php echo $story->id;?>'>
+                <td class='c-id text-left'>
+                  <?php printf('%03d', $story->id);?>
+                </td>
+                <?php if($canOrder):?><td class='sort-handler'><i class='icon-move'></i></td><?php endif;?>
+                <td><span class='label-pri <?php echo 'label-pri-' . $story->pri;?>' title='<?php echo zget($lang->story->priList, $story->pri, $story->pri);?>'><?php echo zget($lang->story->priList, $story->pri, $story->pri);?></span></td>
+                <td class='text-left nobr'><?php echo zget($modulePairs, $story->module, '');?></td>
+                <td class='text-left nobr' title='<?php echo $story->title?>'>
+                  <?php
+                  if($story->parent > 0) echo "<span class='label label-badge label-light' title={$lang->story->children}>{$lang->story->childrenAB}</span>";
+                  echo html::a($viewLink , $story->title);
+                  ?>
+                </td>
+                <td><?php echo zget($users, $story->openedBy);?></td>
+                <td><?php echo zget($users, $story->assignedTo);?></td>
+                <td class='text-right' title="<?php echo $story->estimate . ' ' . $lang->hourCommon;?>"><?php echo $story->estimate . $config->hourUnit;?></td>
+                <td>
+                  <span class='status-story status-<?php echo $story->status?>'>
+                    <?php echo $this->processStatus('story', $story);?>
+                  </span>
+                </td>
+                <td><?php echo $lang->story->stageList[$story->stage];?></td>
+                <td class='c-actions'>
+                  <?php
+                  if($canBeChanged and common::hasPriv('productplan', 'unlinkStory'))
+                  {
+                      $unlinkURL = $this->createLink('mr', 'unlink', "MRID=$MR->id&productID=$product->id&type=story&linkID=$story->id&confirm=yes");
+                      echo html::a("javascript:ajaxDelete(\"$unlinkURL\", \"storyList\", confirmUnlinkStory)", '<i class="icon-unlink"></i>', '', "class='btn' title='{$lang->productplan->unlinkStory}'");
+                  }
+                  ?>
+                </td>
+              </tr>
+              <?php endforeach;?>
+            </tbody>
+          </table>
+          <?php if($stories):?>
+          <div class='table-footer'>
+            <div class='table-statistic'><?php echo $summary;?></div>
+            <?php
+            $this->app->rawParams['type'] = 'story';
+            $storyPager->show('right', 'pagerjs');
+            $this->app->rawParams['type'] = $type;
+            ?>
+          </div>
+          <?php endif;?>
+        </form>
+      </div>
+      <div id='bugs' class='tab-pane <?php if($type == 'bug') echo 'active';?>'>
+        <div class='actions'>
+        <?php echo html::a("javascript:showLink($product->id, \"bug\")", '<i class="icon-bug"></i> ' . $lang->productplan->linkBug, '', "class='btn btn-primary'");?>
+        </div>
+        <div class='linkBox cell hidden'></div>
+        <form class='main-table table-bug' data-ride='table' method='post' target='hiddenwin' action="<?php echo inLink('batchUnlinkBug', "planID=$MR->id&orderBy=$orderBy");?>">
+          <table class='table has-sort-head' id='bugList'>
+            <?php $canBatchUnlink = $canBeChanged and common::hasPriv('productplan', 'batchUnlinkBug');?>
+            <?php $vars = "planID={$MR->id}&type=bug&orderBy=%s&link=$link&param=$param"; ?>
+            <thead>
+              <tr class='text-center'>
+                <th class='c-id text-left'>
+                  <?php common::printOrderLink('id', $orderBy, $vars, $lang->idAB);?>
+                </th>
+                <th class='w-70px'> <?php common::printOrderLink('pri',        $orderBy, $vars, $lang->priAB);?></th>
+                <th class='text-left'><?php common::printOrderLink('title',      $orderBy, $vars, $lang->bug->title);?></th>
+                <th class='c-user'> <?php common::printOrderLink('openedBy',   $orderBy, $vars, $lang->openedByAB);?></th>
+                <th class='c-user'> <?php common::printOrderLink('assignedTo', $orderBy, $vars, $lang->bug->assignedToAB);?></th>
+                <th class='w-100px'><?php common::printOrderLink('status',     $orderBy, $vars, $lang->bug->status);?></th>
+                <th class='w-50px'> <?php echo $lang->actions?></th>
+              </tr>
+            </thead>
+            <tbody class='text-center'>
+              <?php foreach($bugs as $bug):?>
+              <tr>
+                <td class='c-id text-left'>
+                  <?php printf('%03d', $bug->id);?>
+                </td>
+                <td><span class='label-pri label-pri-<?php echo $bug->pri;?>' title='<?php echo zget($lang->bug->priList, $bug->pri, $bug->pri);?>'><?php echo zget($lang->bug->priList, $bug->pri, $bug->pri);?></span></td>
+                <td class='text-left nobr' title='<?php echo $bug->title?>'><?php echo html::a($this->createLink('bug', 'view', "bugID=$bug->id"), $bug->title, '', 'data-app="product"');?></td>
+                <td><?php echo zget($users, $bug->openedBy);?></td>
+                <td><?php echo zget($users, $bug->assignedTo);?></td>
+                <td>
+                  <span class='status-bug status-<?php echo $bug->status?>'>
+                    <?php echo $this->processStatus('bug', $bug);?>
+                  </span>
+                </td>
+                <td class='c-actions'>
+                  <?php
+                  if($canBeChanged and common::hasPriv('productplan', 'unlinkBug'))
+                  {
+                      $unlinkURL = $this->createLink('mr', 'unlink', "MRID=$MR->id&productID=$product->id&type=bug&linkID=$bug->id&confirm=yes");
+                      echo html::a("javascript:ajaxDelete(\"$unlinkURL\", \"bugList\", confirmUnlinkBug)", '<i class="icon-unlink"></i>', '', "class='btn' title='{$lang->productplan->unlinkBug}'");
+                  }
+                  ?>
+                </td>
+              </tr>
+              <?php endforeach;?>
+            </tbody>
+          </table>
+          <?php if($bugs):?>
+          <div class='table-footer'>
+            <div class='table-statistic'><?php echo sprintf($lang->productplan->bugSummary, count($bugs));?></div>
+            <?php
+            $this->app->rawParams['type'] = 'bug';
+            $bugPager->show('right', 'pagerjs');
+            $this->app->rawParams['type'] = $type;
+            ?>
+          </div>
+          <?php endif;?>
+        </form>
+      </div>
+      <div id='tasks' class='tab-pane <?php if($type == 'task') echo 'active';?>'>
+        <div class='actions'>
+        <?php echo html::a("javascript:showLink($product->id, \"task\")", '<i class="icon-todo"></i> ' . $lang->mr->linkTask, '', "class='btn btn-primary'");?>
+        </div>
+        <div class='linkBox cell hidden'></div>
+        <form class='main-table table-task' data-ride='table' method='post' target='hiddenwin' action="<?php echo inLink('batchUnlinkTask', "planID=$MR->id&orderBy=$orderBy");?>">
+          <table class='table has-sort-head' id='taskList'>
+            <?php $canBatchUnlink = $canBeChanged and common::hasPriv('productplan', 'batchUnlinkTask');?>
+            <?php $vars = "MRID={$MR->id}&type=task&orderBy=%s&link=$link&param=$param"; ?>
+            <thead>
+              <tr class='text-center'>
+                <th class='c-id text-left'>
+                  <?php common::printOrderLink('id', $orderBy, $vars, $lang->idAB);?>
+                </th>
+                <th class='w-70px'> <?php common::printOrderLink('pri',        $orderBy, $vars, $lang->priAB);?></th>
+                <th class='text-left'><?php common::printOrderLink('name',      $orderBy, $vars, $lang->task->name);?></th>
+                <th class='c-user'> <?php common::printOrderLink('finishedBy',   $orderBy, $vars, $lang->task->finishedByAB);?></th>
+                <th class='c-user'> <?php common::printOrderLink('assignedTo', $orderBy, $vars, $lang->task->assignedToAB);?></th>
+                <th class='w-100px'><?php common::printOrderLink('status',     $orderBy, $vars, $lang->task->status);?></th>
+                <th class='w-50px'> <?php echo $lang->actions?></th>
+              </tr>
+            </thead>
+            <tbody class='text-center'>
+              <?php foreach($tasks as $task):?>
+              <tr>
+                <td class='c-id text-left'>
+                  <?php printf('%03d', $task->id);?>
+                </td>
+                <td><span class='label-pri label-pri-<?php echo $task->pri;?>' title='<?php echo zget($lang->task->priList, $task->pri, $task->pri);?>'><?php echo zget($lang->task->priList, $task->pri, $task->pri);?></span></td>
+                <td class='text-left nobr' title='<?php echo $task->name?>'><?php echo html::a($this->createLink('task', 'view', "taskID=$task->id"), $task->name, '', 'data-app="product"');?></td>
+                <td><?php echo zget($users, $task->finishedBy);?></td>
+                <td><?php echo zget($users, $task->assignedTo);?></td>
+                <td>
+                  <span class='status-task status-<?php echo $task->status?>'>
+                    <?php echo $this->processStatus('task', $task);?>
+                  </span>
+                </td>
+                <td class='c-actions'>
+                  <?php
+                      $unlinkURL = $this->createLink('mr', 'unlink', "MRID=$MR->id&productID=$product->id&type=task&linkID=$task->id&confirm=yes");
+                      echo html::a("javascript:ajaxDelete(\"$unlinkURL\", \"taskList\", confirmUnlinkTask)", '<i class="icon-unlink"></i>', '', "class='btn' title='{$lang->mr->unlinkTask}'");
+                  ?>
+                </td>
+              </tr>
+              <?php endforeach;?>
+            </tbody>
+          </table>
+          <?php if($tasks):?>
+          <div class='table-footer'>
+            <div class='table-statistic'><?php echo sprintf($lang->mr->taskSummary, count($tasks));?></div>
+            <?php
+            $this->app->rawParams['type'] = 'task';
+            $taskPager->show('right', 'pagerjs');
+            $this->app->rawParams['type'] = $type;
+            ?>
+          </div>
+          <?php endif;?>
+        </form>
+      </div>
+    </div>
+  </div>
+</div>
+<?php js::set('param', helper::safe64Decode($param))?>
+<?php js::set('link', $link)?>
+<?php js::set('orderBy', $orderBy)?>
+<?php js::set('type', $type)?>
+<?php include '../../common/view/footer.html.php';?>
diff --git a/module/mr/view/linkbug.html.php b/module/mr/view/linkbug.html.php
new file mode 100644
index 0000000000..c2d1d60efd
--- /dev/null
+++ b/module/mr/view/linkbug.html.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ * The link bug view of productplan module of ZenTaoPMS.
+ *
+ * @copyright   Copyright 2009-2021 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
+ * @license     ZPL (http://zpl.pub/page/zplv12.html)
+ * @author      Chunsheng Wang <chunsheng@cnezsoft.com>
+ * @package     mr
+ * @version     $Id: linkbug.html.php$
+ * @link        http://www.zentao.net
+ */
+?>
+<div id='queryBox' data-module='bug' class='show no-margin'></div>
+<div id='unlinkBugList'>
+  <form class='main-table table-bug' data-ride='table' method='post' id='unlinkedBugsForm' target='hiddenwin' action='<?php echo $this->createLink('mr', 'linkBug', "MRID=$MRID&productID=$product->id&browseType=$browseType&param=$param&orderBy=$orderBy")?>'>
+    <div class='table-header hl-primary text-primary strong'>
+      <?php echo html::icon('unlink');?> <?php echo $lang->productplan->unlinkedBugs;?>
+    </div>
+    <table class='table tablesorter'>
+      <thead>
+        <tr class='text-center'>
+          <th class='c-id text-left'>
+            <?php if($allBugs):?>
+            <div class="checkbox-primary check-all tablesorter-noSort" title="<?php echo $lang->selectAll?>">
+              <label></label>
+            </div>
+            <?php endif;?>
+            <?php echo $lang->idAB;?>
+          </th>
+          <th class='c-pri'><?php echo $lang->priAB;?></th>
+          <th class='text-left'><?php echo $lang->bug->title;?></th>
+          <th class='c-user'><?php echo $lang->openedByAB;?></th>
+          <th class='c-user'><?php echo $lang->bug->assignedToAB;?></th>
+          <th class='c-status'><?php echo $lang->bug->status;?></th>
+        </tr>
+      </thead>
+      <tbody class='text-center'>
+        <?php $unlinkedCount = 0;?>
+        <?php foreach($allBugs as $bug):?>
+        <tr>
+          <td class='c-id text-left'>
+            <?php echo html::checkbox('bugs', array($bug->id => sprintf('%03d', $bug->id)), $relatedBugs);?>
+          </td>
+          <td><span class='label-pri label-pri-<?php echo $bug->pri;?>' title='<?php echo zget($lang->bug->priList, $bug->pri, $bug->pri)?>'><?php echo zget($lang->bug->priList, $bug->pri, $bug->pri)?></span></td>
+          <td class='text-left nobr' title='<?php echo $bug->title?>'><?php echo html::a($this->createLink('bug', 'view', "bugID=$bug->id", '', true), $bug->title, '', "data-toggle='modal' data-type='iframe' data-width='90%'");?></td>
+          <td><?php echo zget($users, $bug->openedBy);?></td>
+          <td><?php echo zget($users, $bug->assignedTo);?></td>
+          <td>
+            <span class='status-bug status-<?php echo $bug->status?>'>
+              <?php echo $this->processStatus('bug', $bug);?>
+            </span>
+          </td>
+        </tr>
+        <?php $unlinkedCount++;?>
+        <?php endforeach;?>
+      </tbody>
+    </table>
+    <div class='table-footer'>
+      <?php if($unlinkedCount):?>
+      <div class="checkbox-primary check-all"><label><?php echo $lang->selectAll?></label></div>
+      <div class="table-actions btn-toolbar">
+        <?php echo html::submitButton($lang->productplan->linkBug, '', 'btn');?>
+      </div>
+      <?php endif;?>
+      <div class="btn-toolbar">
+        <?php echo html::a(inlink('link', "MRID=$MRID&type=bug&orderBy=$orderBy"), $lang->goback, '', "class='btn'");?>
+      </div>
+      <div class='table-statistic'></div>
+    </div>
+  </form>
+</div>
+<script>
+$(function()
+{
+    $('#unlinkBugList .tablesorter').sortTable();
+    setForm();
+});
+</script>
diff --git a/module/mr/view/linkstory.html.php b/module/mr/view/linkstory.html.php
new file mode 100644
index 0000000000..d26560de18
--- /dev/null
+++ b/module/mr/view/linkstory.html.php
@@ -0,0 +1,91 @@
+<?php
+/**
+ * The link story view of mr module of ZenTaoPMS.
+ *
+ * @copyright   Copyright 2009-2015 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
+ * @license     ZPL (http://zpl.pub/page/zplv12.html)
+ * @author      gang zeng
+ * @package     mr
+ * @version     $Id: linkstory.html.php 5096 2013-07-11 07:02:43Z chencongzhi520@gmail.com $
+ * @link        http://www.zentao.net
+ */
+?>
+<div id='queryBox' data-module='story' class='show no-margin'></div>
+<div id='unlinkStoryList'>
+  <form class="main-table table-story" data-ride="table" method="post" target='hiddenwin' id='unlinkedStoriesForm' action="<?php echo $this->createLink('mr', 'linkStory', "MRID=$MRID&productID=$product->id&browseType=$browseType&param=$param&orderBy=$orderBy")?>">
+    <div class='table-header hl-primary text-primary strong'>
+      <?php echo html::icon('unlink');?> <?php echo $lang->productplan->unlinkedStories;?>
+    </div>
+    <table class='table tablesorter'>
+      <thead>
+        <tr>
+          <th class='c-id text-left'>
+            <?php if($allStories):?>
+            <div class="checkbox-primary check-all tablesorter-noSort" title="<?php echo $lang->selectAll?>">
+              <label></label>
+            </div>
+            <?php endif;?>
+            <?php echo $lang->idAB;?>
+          </th>
+          <th class='c-pri'><?php echo $lang->priAB;?></th>
+          <th class='c-plan'><?php echo $lang->story->plan;?></th>
+          <th class='c-module'><?php echo $lang->story->module;?></th>
+          <th class='text-left'><?php echo $lang->story->title;?></th>
+          <th class='c-user'><?php echo $lang->openedByAB;?></th>
+          <th class='c-user'><?php echo $lang->assignedToAB;?></th>
+          <th class='c-number text-right'><?php echo $lang->story->estimateAB;?></th>
+          <th class='c-status'><?php echo $lang->statusAB;?></th>
+          <th class='c-stage'><?php echo $lang->story->stageAB;?></th>
+        </tr>
+      </thead>
+      <tbody>
+        <?php $unlinkedCount = 0;?>
+        <?php foreach($allStories as $story):?>
+        <tr>
+          <td class='c-id text-left'>
+            <?php echo html::checkbox('stories', array($story->id => sprintf('%03d', $story->id)), $relatedStories);?>
+          </td>
+          <td><span class='label-pri <?php echo 'label-pri-' . $story->pri;?>' title='<?php echo zget($lang->story->priList, $story->pri, $story->pri)?>'><?php echo zget($lang->story->priList, $story->pri, $story->pri)?></span></td>
+          <td><?php echo $story->planTitle;?></td>
+          <td title='<?php echo $modules[$story->module]?>' class='text-left'><?php echo $modules[$story->module];?></td>
+          <td class='text-left nobr' title='<?php echo $story->title?>'>
+            <?php
+            if($story->parent > 0) echo "<span class='label label-badge label-light' title={$lang->story->children}>{$lang->story->childrenAB}</span>";
+            echo html::a($this->createLink('story', 'view', "storyID=$story->id", '', true), $story->title, '', "data-toggle='modal' data-type='iframe' data-width='90%'");
+            ?>
+          </td>
+          <td><?php echo zget($users, $story->openedBy);?></td>
+          <td><?php echo zget($users, $story->assignedTo);?></td>
+          <td class='text-right'title="<?php echo $story->estimate . ' ' . $lang->hourCommon;?>"><?php echo $story->estimate . $config->hourUnit;?></td>
+          <td>
+            <span class='status-story status-<?php echo $story->status?>'>
+              <?php echo $this->processStatus('story', $story);?>
+            </span>
+          </td>
+          <td class='text-center'><?php echo $lang->story->stageList[$story->stage];?></td>
+        </tr>
+        <?php $unlinkedCount++;?>
+        <?php endforeach;?>
+      </tbody>
+    </table>
+    <div class='table-footer'>
+      <?php if($unlinkedCount):?>
+      <div class="checkbox-primary check-all"><label><?php echo $lang->selectAll?></label></div>
+      <div class="table-actions btn-toolbar">
+        <?php echo html::submitButton($lang->productplan->linkStory, '', 'btn');?>
+      </div>
+      <?php endif;?>
+      <div class="btn-toolbar">
+        <?php echo html::a(inlink('link', "MRID=$MRID&type=story&orderBy=$orderBy"), $lang->goback, '', "class='btn'");?>
+      </div>
+      <div class='table-statistic'></div>
+    </div>
+  </form>
+</div>
+<script>
+$(function()
+{
+    $('#unlinkStoryList .tablesorter').sortTable();
+    setForm();
+});
+</script>
diff --git a/module/mr/view/linktask.html.php b/module/mr/view/linktask.html.php
new file mode 100644
index 0000000000..824dc3479e
--- /dev/null
+++ b/module/mr/view/linktask.html.php
@@ -0,0 +1,78 @@
+<?php
+/**
+ * The link task view of productplan module of ZenTaoPMS.
+ *
+ * @copyright   Copyright 2009-2021 青岛易软天创网络科技有限公司(QingDao Nature Easy Soft Network Technology Co,LTD, www.cnezsoft.com)
+ * @license     ZPL (http://zpl.pub/page/zplv12.html)
+ * @author      Chunsheng Wang <chunsheng@cnezsoft.com>
+ * @package     mr
+ * @version     $Id: linktask.html.php$
+ * @link        http://www.zentao.net
+ */
+?>
+<div id='queryBox' data-module='task' class='show no-margin'></div>
+<div id='unlinkTaskList'>
+  <form class='main-table table-task' data-ride='table' method='post' id='unlinkedTasksForm' target='hiddenwin' action='<?php echo $this->createLink('mr', 'linkTask', "MRID=$MRID&productID=$product->id&browseType=$browseType&param=$param&orderBy=$orderBy")?>'>
+    <div class='table-header hl-primary text-primary strong'>
+      <?php echo html::icon('unlink');?> <?php echo $lang->mr->unlinkedTasks;?>
+    </div>
+    <table class='table tablesorter'>
+      <thead>
+        <tr class='text-center'>
+          <th class='c-id text-left'>
+            <?php if($allTasks):?>
+            <div class="checkbox-primary check-all tablesorter-noSort" title="<?php echo $lang->selectAll?>">
+              <label></label>
+            </div>
+            <?php endif;?>
+            <?php echo $lang->idAB;?>
+          </th>
+          <th class='c-pri'><?php echo $lang->priAB;?></th>
+          <th class='text-left'><?php echo $lang->task->name;?></th>
+          <th class='c-user'><?php echo $lang->task->finishedByAB;?></th>
+          <th class='c-user'><?php echo $lang->task->assignedToAB;?></th>
+          <th class='c-status'><?php echo $lang->task->status;?></th>
+        </tr>
+      </thead>
+      <tbody class='text-center'>
+        <?php $unlinkedCount = 0;?>
+        <?php foreach($allTasks as $task):?>
+        <tr>
+          <td class='c-id text-left'>
+            <?php echo html::checkbox('tasks', array($task->id => sprintf('%03d', $task->id)), $relatedTasks);?>
+          </td>
+          <td><span class='label-pri label-pri-<?php echo $task->pri;?>' title='<?php echo zget($lang->task->priList, $task->pri, $task->pri)?>'><?php echo zget($lang->task->priList, $task->pri, $task->pri)?></span></td>
+          <td class='text-left nobr' title='<?php echo $task->name?>'><?php echo html::a($this->createLink('task', 'view', "taskID=$task->id", '', true), $task->name, '', "data-toggle='modal' data-type='iframe' data-width='90%'");?></td>
+          <td><?php echo zget($users, $task->finishedBy);?></td>
+          <td><?php echo zget($users, $task->assignedTo);?></td>
+          <td>
+            <span class='status-task status-<?php echo $task->status?>'>
+              <?php echo $this->processStatus('task', $task);?>
+            </span>
+          </td>
+        </tr>
+        <?php $unlinkedCount++;?>
+        <?php endforeach;?>
+      </tbody>
+    </table>
+    <div class='table-footer'>
+      <?php if($unlinkedCount):?>
+      <div class="checkbox-primary check-all"><label><?php echo $lang->selectAll?></label></div>
+      <div class="table-actions btn-toolbar">
+        <?php echo html::submitButton($lang->mr->linkTask, '', 'btn');?>
+      </div>
+      <?php endif;?>
+      <div class="btn-toolbar">
+        <?php echo html::a(inlink('link', "MRID=$MRID&type=task&orderBy=$orderBy"), $lang->goback, '', "class='btn'");?>
+      </div>
+      <div class='table-statistic'></div>
+    </div>
+  </form>
+</div>
+<script>
+$(function()
+{
+    $('#unlinkTaskList .tablesorter').sortTable();
+    setForm();
+});
+</script>
diff --git a/module/repo/model.php b/module/repo/model.php
index 4f6637891b..184c9eb814 100644
--- a/module/repo/model.php
+++ b/module/repo/model.php
@@ -1821,4 +1821,18 @@ class repoModel extends model
             $this->loadModel('git')->updateCommit($repo, $commentGroup, false);
         }
     }
+
+    /**
+     * Get products which scm is GitLab by projects.
+     *
+     * @param  array $projectIDs
+     * @return array
+     */
+    public function getGitlabProductsByProjects($projectIDs)
+    {
+        return $this->dao->select('path,product')->from(TABLE_REPO)->where('deleted')->eq('0')
+            ->andWhere('SCM')->eq('Gitlab')
+            ->andWhere('path')->in($projectIDs)
+            ->fetchPairs('path', 'product');
+    }
 }