diff --git a/module/product/js/all.js b/module/product/js/all.js
index e3e8a72217..59c2438291 100644
--- a/module/product/js/all.js
+++ b/module/product/js/all.js
@@ -60,7 +60,12 @@ $(function()
         });
     }
 
-    /* Add a statistics prompt statement after the Edit button */
+    /**
+     * Add a statistics prompt statement after the Edit button.
+     *
+     * @access public
+     * @return void
+     */
     function addStatistic()
     {
         var checkedLength = $(":checkbox[name^='productIDList']:checked").length;
@@ -77,6 +82,35 @@ $(function()
         }
     }
 
+    /**
+     * Anti shake operation for jquery.
+     *
+     * @param  fn $fn
+     * @param  delay $delay
+     * @access public
+     * @return void
+     */
+    function debounce(fn, delay)
+    {
+        var timer = null;
+        return function()
+        {
+            if(timer) clearTimeout(timer);
+            timer = setTimeout(fn, delay)
+        }
+    }
+
+    /**
+     * Update statistics.
+     *
+     * @access public
+     * @return void
+     */
+    function updateStatistic()
+    {
+        debounce(addStatistic(), 200)
+    }
+
     $('#productTableList').on('click', '.row-program,.row-line', function(e)
     {
         if($(e.target).closest('.table-nest-toggle,a').length) return;
@@ -96,7 +130,7 @@ $(function()
         {
             updatePrarentCheckbox($('#productTableList>tr[data-id="' + parentID + '"]'));
         }
-        addStatistic()
+        updateStatistic()
     });
 
     $('#productListForm').on('checkChange', updateCheckboxes);
@@ -104,7 +138,7 @@ $(function()
 
     $(":checkbox[name^='productIDList']").on('click', function()
     {
-        addStatistic()
+        updateStatistic()
     });
 
     $(".check-all").on('click', function()
@@ -117,6 +151,6 @@ $(function()
         {
             $(":checkbox[name^='productIDList']").prop('checked', true);
         }
-        addStatistic()
+        updateStatistic()
     });
 });
diff --git a/module/program/lang/de.php b/module/program/lang/de.php
index 86fcbcd233..ddc8622604 100644
--- a/module/program/lang/de.php
+++ b/module/program/lang/de.php
@@ -47,6 +47,7 @@ $lang->program->realDuration   = 'RealDuration';
 $lang->program->openedVersion  = 'OpenedVersion';
 $lang->program->lastEditedBy   = 'LastEditedBy';
 $lang->program->lastEditedDate = 'LastEditedDate';
+$lang->program->childProgram   = 'Child Program';
 
 /* Actions. */
 $lang->program->common                  = 'Program';
@@ -99,10 +100,10 @@ $lang->program->noProgram          = 'No program.';
 $lang->program->showClosed         = 'Closed programs.';
 $lang->program->tips               = 'If a parent program is selected, the products under the parent program can be associated. If no program is selected for the project, a product with the same name as the project is created and associated with the project by default.';
 $lang->program->confirmBatchUnlink = "Do you want to batch unlink these stakeholders?";
-$lang->program->beginLetterParent  = 'The start date of the program "%s" should be ≥ the start date of the parent program "%s": %s.';
-$lang->program->endGreaterParent   = 'The finish date of the program "%s" should be ≤ the finish date of the parent program "%s": %s.';
-$lang->program->beginGreateChild   = 'The start date of the parent program "%s" should be ≤the minimum start time of the subprogram "%s": %s.';
-$lang->program->endLetterChild     = 'The finish time of the parent program "%s" should be ≥ the maximum finish time of the subprogram "%s": %s.';
+$lang->program->beginLetterParent  = 'The start date of the program should be ≥ the start date of the parent program: %s.';
+$lang->program->endGreaterParent   = 'The finish date of the program should be ≤ the finish date of the parent program: %s.';
+$lang->program->beginGreateChild   = 'The start date of the parent program should be ≤the minimum start time of the %s: %s.';
+$lang->program->endLetterChild     = 'The finish time of the parent program should be ≥ the maximum finish time of the %s: %s.';
 $lang->program->closeErrorMessage  = 'There are subprograms or projects that are not closed';
 $lang->program->hasChildren        = 'It has child programs or projects. You cannot delete it.';
 $lang->program->hasProduct         = 'It has products. You cannot delete it.';
diff --git a/module/program/lang/en.php b/module/program/lang/en.php
index 44a8f7ac5d..c1bff24805 100644
--- a/module/program/lang/en.php
+++ b/module/program/lang/en.php
@@ -47,6 +47,7 @@ $lang->program->realDuration   = 'RealDuration';
 $lang->program->openedVersion  = 'OpenedVersion';
 $lang->program->lastEditedBy   = 'LastEditedBy';
 $lang->program->lastEditedDate = 'LastEditedDate';
+$lang->program->childProgram   = 'Child Program';
 
 /* Actions. */
 $lang->program->common                  = 'Program';
@@ -99,10 +100,10 @@ $lang->program->noProgram          = 'No program.';
 $lang->program->showClosed         = 'Closed';
 $lang->program->tips               = 'If a parent program is selected, the products under the parent program can be associated. If no program is selected for the project, a product with the same name as the project is created and associated with the project by default.';
 $lang->program->confirmBatchUnlink = "Do you want to batch unlink these stakeholders?";
-$lang->program->beginLetterParent  = 'The start date of the program "%s" should be ≥ the start date of the parent program "%s": %s.';
-$lang->program->endGreaterParent   = 'The finish date of the program "%s" should be ≤ the finish date of the parent program "%s": %s.';
-$lang->program->beginGreateChild   = 'The start date of the parent program "%s" should be ≤the minimum start time of the subprogram "%s": %s.';
-$lang->program->endLetterChild     = 'The finish time of the parent program "%s" should be ≥ the maximum finish time of the subprogram "%s": %s.';
+$lang->program->beginLetterParent  = 'The start date of the program should be ≥ the start date of the parent program: %s.';
+$lang->program->endGreaterParent   = 'The finish date of the program should be ≤ the finish date of the parent program: %s.';
+$lang->program->beginGreateChild   = 'The start date of the parent program should be ≤the minimum start time of the %s: %s.';
+$lang->program->endLetterChild     = 'The finish time of the parent program should be ≥ the maximum finish time of the %s: %s.';
 $lang->program->closeErrorMessage  = 'There are subprograms or projects that are not closed';
 $lang->program->hasChildren        = 'The program has a child program or the project exists and can not be deleted.';
 $lang->program->hasProduct         = 'The program has products exist and can not be deleted.';
diff --git a/module/program/lang/fr.php b/module/program/lang/fr.php
index c0e96d374d..3b123757f2 100644
--- a/module/program/lang/fr.php
+++ b/module/program/lang/fr.php
@@ -47,6 +47,7 @@ $lang->program->realDuration   = 'RealDuration';
 $lang->program->openedVersion  = 'OpenedVersion';
 $lang->program->lastEditedBy   = 'LastEditedBy';
 $lang->program->lastEditedDate = 'LastEditedDate';
+$lang->program->childProgram   = 'sous-programme';
 
 /* Actions. */
 $lang->program->common                  = 'Program';
@@ -99,10 +100,10 @@ $lang->program->noProgram          = 'No program.';
 $lang->program->showClosed         = 'Closed programs.';
 $lang->program->tips               = 'If a parent program is selected, the products under the parent program can be associated. If no program is selected for the project, a product with the same name as the project is created and associated with the project by default.';
 $lang->program->confirmBatchUnlink = "Do you want to batch unlink these stakeholders?";
-$lang->program->beginLetterParent  = 'La date de début du programme "%s" doit être ≥ à la date de début du programme parent "%s" : %s.';
-$lang->program->endGreaterParent   = 'La date de fin du programme "%s" doit être ≤ à la date de fin du programme parent "%s" : %s.';
-$lang->program->beginGreateChild   = 'La date de début du programme parent "%s" doit être ≤ à la date de début minimum du sous-programme "%s" : %s.';
-$lang->program->endLetterChild     = 'Le temps de fin du programme parent "%s" doit être ≥ au temps de fin maximum du sous-programme "%s" : %s.';
+$lang->program->beginLetterParent  = 'La date de début du programme doit être ≥ à la date de début du programme parent: %s.';
+$lang->program->endGreaterParent   = 'La date de fin du programme doit être ≤ à la date de fin du programme parent: %s.';
+$lang->program->beginGreateChild   = 'La date de début du programme parent doit être ≤ à la date de début minimum du %s: %s.';
+$lang->program->endLetterChild     = 'Le temps de fin du programme parent doit être ≥ au temps de fin maximum du %s: %s.';
 $lang->program->closeErrorMessage  = 'There are subprograms or projects that are not closed';
 $lang->program->hasChildren        = 'It has child programs or projects. You cannot delete it.';
 $lang->program->hasProduct         = 'It has products. You cannot delete it.';
diff --git a/module/program/lang/zh-cn.php b/module/program/lang/zh-cn.php
index 91c20bc491..0ec1b2a72a 100644
--- a/module/program/lang/zh-cn.php
+++ b/module/program/lang/zh-cn.php
@@ -47,6 +47,7 @@ $lang->program->realDuration   = '实际周期天数';
 $lang->program->openedVersion  = '创建版本';
 $lang->program->lastEditedBy   = '最后编辑人';
 $lang->program->lastEditedDate = '最后编辑日期';
+$lang->program->childProgram   = '子项目集';
 
 /* Actions. */
 $lang->program->common                  = '项目集';
@@ -99,10 +100,10 @@ $lang->program->noProgram          = '暂时没有项目集';
 $lang->program->showClosed         = '显示已关闭';
 $lang->program->tips               = '选择了父项目集，则可关联该父项目集下的产品。如果项目未选择任何项目集，则系统会默认创建一个和该项目同名的产品并关联该项目。';
 $lang->program->confirmBatchUnlink = "您确定要批量移除这些干系人吗？";
-$lang->program->beginLetterParent  = '项目集“%s”开始日期应大于等于父项目集“%s”的开始日期：%s。';
-$lang->program->endGreaterParent   = '项目集“%s”完成日期应小于等于父项目集“%s”的完成日期：%s。';
-$lang->program->beginGreateChild   = '父项目集“%s”的开始日期应小于等于子项目集“%s”的最小开始时间：%s。';
-$lang->program->endLetterChild     = '父项目集“%s”的完成时间应大于等于子项目集“%s”的最大完成时间：%s。';
+$lang->program->beginLetterParent  = '项目集开始日期应大于等于父项目集的开始日期：%s。';
+$lang->program->endGreaterParent   = '项目集完成日期应小于等于父项目集的完成日期：%s。';
+$lang->program->beginGreateChild   = '父项目集的开始日期应小于等于%s的最小开始时间：%s。';
+$lang->program->endLetterChild     = '父项目集的完成时间应大于等于%s的最大完成时间：%s。';
 $lang->program->closeErrorMessage  = '存在子项目集或项目为未关闭状态';
 $lang->program->hasChildren        = '该项目集有子项目集或项目存在，不能删除。';
 $lang->program->hasProduct         = '该项目集有产品存在，不能删除。';
diff --git a/module/program/model.php b/module/program/model.php
index 64d00dbc07..caf71c1072 100644
--- a/module/program/model.php
+++ b/module/program/model.php
@@ -709,13 +709,13 @@ class programModel extends model
             if($parentProgram)
             {
                 /* Child program begin cannot less than parent. */
-                if(!empty($program->name) and $program->begin < $parentProgram->begin) dao::$errors['begin'] = sprintf($this->lang->program->beginLetterParent, $program->name, $parentProgram->name, $parentProgram->begin);
+                if(!empty($program->name) and $program->begin < $parentProgram->begin) dao::$errors['begin'] = sprintf($this->lang->program->beginLetterParent, $parentProgram->begin);
 
                 /* When parent set end then child program end cannot greater than parent. */
-                if(!empty($program->name) and$parentProgram->end != '0000-00-00' and $program->end > $parentProgram->end) dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $program->name, $parentProgram->name, $parentProgram->end);
+                if(!empty($program->name) and$parentProgram->end != '0000-00-00' and $program->end > $parentProgram->end) dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $parentProgram->end);
 
                 /* When parent set end then child program cannot set longTime. */
-                if(!empty($program->name) and empty($program->end) and $this->post->delta == 999 and $parentProgram->end != '0000-00-00') dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $program->name, $parentProgram->name, $parentProgram->end);
+                if(!empty($program->name) and empty($program->end) and $this->post->delta == 999 and $parentProgram->end != '0000-00-00') dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $parentProgram->end);
 
                 /* The budget of a child program cannot beyond the remaining budget of the parent program. */
                 $program->budgetUnit = $parentProgram->budgetUnit;
@@ -772,6 +772,7 @@ class programModel extends model
      */
     public function update($programID)
     {
+        $this->app->loadLang('project');
         $programID  = (int)$programID;
         $oldProgram = $this->dao->findById($programID)->from(TABLE_PROGRAM)->fetch();
 
@@ -799,11 +800,13 @@ class programModel extends model
 
         if($children > 0)
         {
-            $minChildBegin = $this->dao->select('name, min(begin) as minBegin')->from(TABLE_PROGRAM)->where('id')->ne($programID)->andWhere('deleted')->eq(0)->andWhere('path')->like("%,{$programID},%")->fetch();
-            $maxChildEnd   = $this->dao->select('name, max(end) as maxEnd')->from(TABLE_PROGRAM)->where('id')->ne($programID)->andWhere('deleted')->eq(0)->andWhere('path')->like("%,{$programID},%")->andWhere('end')->ne('0000-00-00')->fetch();
+            $minChildBegin = $this->dao->select('type, begin as minBegin')->from(TABLE_PROGRAM)->where('id')->ne($programID)->andWhere('deleted')->eq(0)->andWhere('path')->like("%,{$programID},%")->orderBy('begin_asc')->fetch();
+            $maxChildEnd   = $this->dao->select('type, end as maxEnd')->from(TABLE_PROGRAM)->where('id')->ne($programID)->andWhere('deleted')->eq(0)->andWhere('path')->like("%,{$programID},%")->andWhere('end')->ne('0000-00-00')->orderBy('end_desc')->fetch();
 
-            if($minChildBegin and $program->begin > $minChildBegin) dao::$errors['begin'] = sprintf($this->lang->program->beginGreateChild, $program->name, $minChildBegin->name, $minChildBegin->minBegin);
-            if($maxChildEnd   and $program->end   < $maxChildEnd and $this->post->delta != 999) dao::$errors['end'] = sprintf($this->lang->program->endLetterChild, $program->name, $maxChildEnd->name, $maxChildEnd->maxEnd);
+            $minChildType = ($minChildBegin->type == 'project') ? $this->lang->project->common : $this->lang->program->childProgram;
+            $maxChildType = ($maxChildEnd->type   == 'project') ? $this->lang->project->common : $this->lang->program->childProgram;
+            if($minChildBegin and $program->begin > $minChildBegin->minBegin) dao::$errors['begin'] = sprintf($this->lang->program->beginGreateChild, $minChildType, $minChildBegin->minBegin);
+            if($maxChildEnd   and $program->end   < $maxChildEnd->maxEnd and $this->post->delta != 999) dao::$errors['end'] = sprintf($this->lang->program->endLetterChild, $maxChildType, $maxChildEnd->maxEnd);
             if(dao::isError()) return false;
         }
 
@@ -818,9 +821,9 @@ class programModel extends model
             $parentProgram = $this->dao->select('*')->from(TABLE_PROGRAM)->where('id')->eq($program->parent)->fetch();
             if($parentProgram)
             {
-                if(!empty($program->name) and $program->begin < $parentProgram->begin) dao::$errors['begin'] = sprintf($this->lang->program->beginLetterParent, $program->name, $parentProgram->name, $parentProgram->begin);
-                if(!empty($program->name) and $parentProgram->end != '0000-00-00' and $program->end > $parentProgram->end) dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $program->name, $parentProgram->name, $parentProgram->end);
-                if(!empty($program->name) and empty($program->end) and $this->post->delta == 999 and $parentProgram->end != '0000-00-00') dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $program->name, $parentProgram->name, $parentProgram->end);
+                if(!empty($program->name) and $program->begin < $parentProgram->begin) dao::$errors['begin'] = sprintf($this->lang->program->beginLetterParent, $parentProgram->begin);
+                if(!empty($program->name) and $parentProgram->end != '0000-00-00' and $program->end > $parentProgram->end) dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $parentProgram->end);
+                if(!empty($program->name) and empty($program->end) and $this->post->delta == 999 and $parentProgram->end != '0000-00-00') dao::$errors['end'] = sprintf($this->lang->program->endGreaterParent, $parentProgram->end);
             }
 
             /* The budget of a child program cannot beyond the remaining budget of the parent program. */
diff --git a/module/project/lang/de.php b/module/project/lang/de.php
index f9a6cf60a2..0297e0c2a6 100644
--- a/module/project/lang/de.php
+++ b/module/project/lang/de.php
@@ -65,7 +65,7 @@ $lang->project->budgetGe0          = '『Budget』must be greater than or equal
 $lang->project->allProjects        = 'All Projects';
 
 /* Fields. */
-$lang->project->common             = 'Program';
+$lang->project->common             = 'Project';
 $lang->project->id                 = 'ID';
 $lang->project->project            = 'Project';
 $lang->project->stage              = 'Stage';
@@ -307,21 +307,23 @@ $lang->project->programTitle['0']    = 'Hide';
 $lang->project->programTitle['base'] = 'Base-level project only';
 $lang->project->programTitle['end']  = 'End-level project only';
 
-$lang->project->accessDenied        = 'Access denied!';
-$lang->project->chooseProgramType   = 'Select the project management model';
-$lang->project->cannotCreateChild   = 'It is not empty, so you cannot add a child. You can add a parent for it, and then create a child.';
-$lang->project->hasChildren         = 'This project has a child project, so it cannot be deleted.';
-$lang->project->confirmDelete       = "Do you want to delete [%s]?";
-$lang->project->cannotChangeToCat   = "It is not empty, so you cannot change it to a parent.";
-$lang->project->cannotCancelCat     = "It has child projects, so you cannot unmark the parent.";
-$lang->project->parentBeginEnd      = "Parent begin&end date: %s ~ %s";
-$lang->project->parentBudget        = "The budget of the parent project: ";
-$lang->project->beginLetterParent   = "The begin date of the parent project: %s. It cannot be < the begin date of its parent project.";
-$lang->project->endGreaterParent    = "The end date of the parent project: %s. It cannot be > the end date of its parent project.";
-$lang->project->beginGreateChild    = 'The start date of the project "%s" should be ≥ the start date of program "%s": %s.';
-$lang->project->endLetterChild      = 'The finish date of the project "%s" should be ≤ the finish date of program "%s": %s.';
-$lang->project->childLongTime       = "If a child as long-term projects, the parent should be long-term too.";
-$lang->project->confirmUnlinkMember = "Do you want to remove this user from project?";
+$lang->project->accessDenied         = 'Access denied!';
+$lang->project->chooseProgramType    = 'Select the project management model';
+$lang->project->cannotCreateChild    = 'It is not empty, so you cannot add a child. You can add a parent for it, and then create a child.';
+$lang->project->hasChildren          = 'This project has a child project, so it cannot be deleted.';
+$lang->project->confirmDelete        = "Do you want to delete [%s]?";
+$lang->project->cannotChangeToCat    = "It is not empty, so you cannot change it to a parent.";
+$lang->project->cannotCancelCat      = "It has child projects, so you cannot unmark the parent.";
+$lang->project->parentBeginEnd       = "Parent begin&end date: %s ~ %s";
+$lang->project->parentBudget         = "The budget of the parent project: ";
+$lang->project->beginLetterParent    = "The begin date of the parent project: %s. It cannot be < the begin date of its parent project.";
+$lang->project->endGreaterParent     = "The end date of the parent project: %s. It cannot be > the end date of its parent project.";
+$lang->project->beginGreateChild     = 'The start date of the project should be ≥ the start date of program: %s.';
+$lang->project->endLetterChild       = 'The finish date of the project should be ≤ the finish date of program: %s.';
+$lang->project->begigLetterExecution = 'The start date of project should be ≤ the minimum start date of the execution: %s.';
+$lang->project->endGreateExecution   = 'The finish date of the project should be ≥ the maximum finish date of the execution: %s.';
+$lang->project->childLongTime        = "If a child as long-term projects, the parent should be long-term too.";
+$lang->project->confirmUnlinkMember  = "Do you want to remove this user from project?";
 
 $lang->project->action = new stdclass();
 $lang->project->action->managed = '$date, managed by <strong>$actor</strong>. $extra' . "\n";
diff --git a/module/project/lang/en.php b/module/project/lang/en.php
index 3e07049109..87a656b975 100644
--- a/module/project/lang/en.php
+++ b/module/project/lang/en.php
@@ -318,8 +318,10 @@ $lang->project->parentBeginEnd      = "The begin and end date of the parent proj
 $lang->project->parentBudget        = "The budget of the parent project: ";
 $lang->project->beginLetterParent   = "The begin date of the parent project: %s. It cannot be < the begin date of its parent project.";
 $lang->project->endGreaterParent    = "The end date of the parent project: %s. It cannot be > the end date of its parent project.";
-$lang->project->beginGreateChild    = 'The start date of the project "%s" should be ≥ the start date of program "%s": %s.';
-$lang->project->endLetterChild      = 'The finish date of the project "%s" should be ≤ the finish date of program "%s": %s.';
+$lang->project->beginGreateChild    = 'The start date of the project should be ≥ the start date of program: %s.';
+$lang->project->endLetterChild      = 'The finish date of the project should be ≤ the finish date of program: %s.';
+$lang->project->begigLetterExecution = 'The start date of project should be ≤ the minimum start date of the execution: %s.';
+$lang->project->endGreateExecution   = 'The finish date of the project should be ≥ the maximum finish date of the execution: %s.';
 $lang->project->childLongTime       = "There are long-term projects in the child project, and the parent project should also be a long-term project.";
 $lang->project->confirmUnlinkMember = "Do you want to remove this user from project?";
 
diff --git a/module/project/lang/fr.php b/module/project/lang/fr.php
index f3969c0654..b08f7cae8c 100644
--- a/module/project/lang/fr.php
+++ b/module/project/lang/fr.php
@@ -65,7 +65,7 @@ $lang->project->budgetGe0          = '『Budget』must be greater than or equal
 $lang->project->allProjects        = 'All Projects';
 
 /* Fields. */
-$lang->project->common             = 'Project';
+$lang->project->common             = 'Projets';
 $lang->project->id                 = 'ID';
 $lang->project->project            = 'Project';
 $lang->project->stage              = 'Stage';
@@ -307,21 +307,23 @@ $lang->project->programTitle['0']    = 'Hide';
 $lang->project->programTitle['base'] = 'Base-level project only';
 $lang->project->programTitle['end']  = 'End-level project only';
 
-$lang->project->accessDenied        = 'Access denied!';
-$lang->project->chooseProgramType   = 'Select the project management model';
-$lang->project->cannotCreateChild   = 'It is not empty, so you cannot add a child. You can add a parent for it, and then create a child.';
-$lang->project->hasChildren         = 'This project has a child project, so it cannot be deleted.';
-$lang->project->confirmDelete       = "Do you want to delete [%s]?";
-$lang->project->cannotChangeToCat   = "It is not empty, so you cannot change it to a parent.";
-$lang->project->cannotCancelCat     = "It has child projects, so you cannot unmark the parent.";
-$lang->project->parentBeginEnd      = "Parent begin&end date: %s ~ %s";
-$lang->project->parentBudget        = "The budget of the parent project: ";
-$lang->project->beginLetterParent   = "The begin date of the parent project: %s. It cannot be < the begin date of its parent project.";
-$lang->project->endGreaterParent    = "The end date of the parent project: %s. It cannot be > the end date of its parent project.";
-$lang->project->beginGreateChild    = 'La date de début du projets "%s" doit être ≥ à la date de début du programme "%s" : %s.';
-$lang->project->endLetterChild      = 'La date de fin du projets "%s" doit être ≤ à la date de fin du programme "%s" : %s.';
-$lang->project->childLongTime       = "If a child as long-term projects, the parent should be long-term too.";
-$lang->project->confirmUnlinkMember = "Do you want to remove this user from project?";
+$lang->project->accessDenied         = 'Access denied!';
+$lang->project->chooseProgramType    = 'Select the project management model';
+$lang->project->cannotCreateChild    = 'It is not empty, so you cannot add a child. You can add a parent for it, and then create a child.';
+$lang->project->hasChildren          = 'This project has a child project, so it cannot be deleted.';
+$lang->project->confirmDelete        = "Do you want to delete [%s]?";
+$lang->project->cannotChangeToCat    = "It is not empty, so you cannot change it to a parent.";
+$lang->project->cannotCancelCat      = "It has child projects, so you cannot unmark the parent.";
+$lang->project->parentBeginEnd       = "Parent begin&end date: %s ~ %s";
+$lang->project->parentBudget         = "The budget of the parent project: ";
+$lang->project->beginLetterParent    = "The begin date of the parent project: %s. It cannot be < the begin date of its parent project.";
+$lang->project->endGreaterParent     = "The end date of the parent project: %s. It cannot be > the end date of its parent project.";
+$lang->project->beginGreateChild     = 'La date de début du projets "%s" doit être ≥ à la date de début du programme "%s" : %s.';
+$lang->project->endLetterChild       = 'La date de fin du projets doit être ≤ à la date de fin du programme: %s.';
+$lang->project->begigLetterExecution = 'La date de début du projet "%s" doit être ≤ à la date de début minimum d\'excution: %s';
+$lang->project->endGreateExecution   = 'La date de fin du projet "%s" doit être ≥ à la date de fin maximale d\'exécution: %s.';
+$lang->project->childLongTime        = "If a child as long-term projects, the parent should be long-term too.";
+$lang->project->confirmUnlinkMember  = "Do you want to remove this user from project?";
 
 $lang->project->action = new stdclass();
 $lang->project->action->managed = '$date, managed by <strong>$actor</strong>. $extra' . "\n";
diff --git a/module/project/lang/zh-cn.php b/module/project/lang/zh-cn.php
index 04edb713da..eacc6c49c0 100644
--- a/module/project/lang/zh-cn.php
+++ b/module/project/lang/zh-cn.php
@@ -310,18 +310,20 @@ $lang->project->programTitle['end']  = '只显示最后一级项目集';
 $lang->project->accessDenied        = '您无权访问该项目！';
 $lang->project->chooseProgramType   = '选择项目管理方式';
 $lang->project->cannotCreateChild   = '该项目已经有实际的内容，无法直接添加子项目。您可以为当前项目创建一个父项目，然后在新的父项目下面添加子项目。';
-$lang->project->hasChildren         = '该项目有子项目存在，不能删除。';
-$lang->project->confirmDelete       = '您确定删除项目“%s”吗？';
-$lang->project->cannotChangeToCat   = "该项目已经有实际的内容，无法修改为父项目";
-$lang->project->cannotCancelCat     = "该项目下已经有子项目，无法取消父项目标记";
-$lang->project->parentBeginEnd      = "父项目起止时间：%s ~ %s";
-$lang->project->parentBudget        = "父项目预算：";
-$lang->project->beginLetterParent   = "父项目的开始日期：%s，开始日期不能小于父项目的开始日期";
-$lang->project->endGreaterParent    = "父项目的完成日期：%s，完成日期不能大于父项目的完成日期";
-$lang->project->beginGreateChild    = '项目“%s”的开始日期应大于等于项目集“%s”的最小开始日期：%s';
-$lang->project->endLetterChild      = '项目“%s”的完成日期应小于等于项目集“%s”的最大完成日期：%s';
-$lang->project->childLongTime       = "子项目中有长期项目，父项目也应该是长期项目";
-$lang->project->confirmUnlinkMember = "您确定从该项目中移除该用户吗？";
+$lang->project->hasChildren          = '该项目有子项目存在，不能删除。';
+$lang->project->confirmDelete        = '您确定删除项目“%s”吗？';
+$lang->project->cannotChangeToCat    = "该项目已经有实际的内容，无法修改为父项目";
+$lang->project->cannotCancelCat      = "该项目下已经有子项目，无法取消父项目标记";
+$lang->project->parentBeginEnd       = "父项目起止时间：%s ~ %s";
+$lang->project->parentBudget         = "父项目预算：";
+$lang->project->beginLetterParent    = "父项目的开始日期：%s，开始日期不能小于父项目的开始日期";
+$lang->project->endGreaterParent     = "父项目的完成日期：%s，完成日期不能大于父项目的完成日期";
+$lang->project->beginGreateChild     = '项目的开始日期应大于等于项目集的最小开始日期：%s';
+$lang->project->endLetterChild       = '项目的完成日期应小于等于项目集的最大完成日期：%s';
+$lang->project->begigLetterExecution = '项目的开始日期应小于等于执行的最小开始日期：%s';
+$lang->project->endGreateExecution   = '项目的完成日期应大于等于执行的最大完成日期：%s';
+$lang->project->childLongTime        = "子项目中有长期项目，父项目也应该是长期项目";
+$lang->project->confirmUnlinkMember  = "您确定从该项目中移除该用户吗？";
 
 $lang->project->action = new stdclass();
 $lang->project->action->managed = '$date, 由 <strong>$actor</strong> 维护。$extra' . "\n";
diff --git a/module/project/model.php b/module/project/model.php
index 7fc4a0f36e..ae90e96cb2 100644
--- a/module/project/model.php
+++ b/module/project/model.php
@@ -1094,10 +1094,10 @@ class projectModel extends model
             if($program)
             {
                 /* Child project begin cannot less than parent. */
-                if(!empty($project->name) and $project->begin < $program->begin) dao::$errors['begin'] = sprintf($this->lang->project->beginGreateChild, $project->name, $program->name, $program->begin);
+                if(!empty($project->name) and $project->begin < $program->begin) dao::$errors['begin'] = sprintf($this->lang->project->beginGreateChild, $program->begin);
 
                 /* When parent set end then child project end cannot greater than parent. */
-                if(!empty($project->name) and $$program->end != '0000-00-00' and $project->end > $program->end) dao::$errors['end'] = sprintf($this->lang->project->endLetterChild, $project->name, $program->name, $program->end);
+                if(!empty($project->name) and $$program->end != '0000-00-00' and $project->end > $program->end) dao::$errors['end'] = sprintf($this->lang->project->endLetterChild, $program->end);
 
                 if(dao::isError()) return false;
             }
@@ -1358,10 +1358,10 @@ class projectModel extends model
             if($program)
             {
                 /* Child project begin cannot less than parent. */
-                if(!empty($project->name) and $project->begin < $program->begin) dao::$errors['begin'] = sprintf($this->lang->project->beginGreateChild, $project->name, $program->name, $program->begin);
+                if(!empty($project->name) and $project->begin < $program->begin) dao::$errors['begin'] = sprintf($this->lang->project->beginGreateChild, $program->begin);
 
                 /* When parent set end then child project end cannot greater than parent. */
-                if(!empty($project->name) and $program->end != '0000-00-00' and $project->end > $program->end) dao::$errors['end'] = sprintf($this->lang->project->endLetterChild, $project->name, $program->name, $program->end);
+                if(!empty($project->name) and $program->end != '0000-00-00' and $project->end > $program->end) dao::$errors['end'] = sprintf($this->lang->project->endLetterChild, $program->end);
 
                 if(dao::isError()) return false;
             }
@@ -1375,6 +1375,19 @@ class projectModel extends model
             }
         }
 
+        $executionsCount = $this->dao->select('COUNT(*) as count')->from(TABLE_PROJECT)
+            ->where('project')->eq($project->id)
+            ->andWhere('deleted')->eq('0')
+            ->fetchAll();
+        if(!empty($executionsCount))
+        {
+            $minExecutionBegin = $this->dao->select('begin as minBegin')->from(TABLE_PROJECT)->where('project')->eq($project->id)->andWhere('deleted')->eq('0')->orderBy('begin_asc')->fetch();
+            $maxExecutionEnd   = $this->dao->select('end as maxEnd')->from(TABLE_PROJECT)->where('project')->eq($project->id)->andWhere('deleted')->eq('0')->orderBy('end_desc')->fetch();
+            if($minExecutionBegin and $project->begin > $minExecutionBegin->minBegin) dao::$errors['begin'] = sprintf($this->lang->project->begigLetterExecution, $minExecutionBegin->minBegin);
+            if($maxExecutionEnd and $project->end < $maxExecutionEnd->maxEnd) dao::$errors['end'] = sprintf($this->lang->project->endGreateExecution, $maxExecutionEnd->maxEnd);
+            if(dao::isError()) return false;
+        }
+
         /* Judge products not empty. */
         $linkedProductsCount = 0;
         foreach($_POST['products'] as $product)
@@ -1529,14 +1542,14 @@ class projectModel extends model
                     /* Child project begin cannot less than parent. */
                     if(!empty($projects[$projectID]->name) and $projects[$projectID]->begin < $parentProject->begin)
                     {
-                        dao::$errors['begin'] = sprintf($this->lang->project->beginGreateChild, $projects[$projectID]->name, $parentProject->name, $parentProject->begin);
+                        dao::$errors['begin'] = sprintf($this->lang->project->beginGreateChild, $parentProject->begin);
                         return false;
                     }
 
                     /* When parent set end then child project end cannot greater than parent. */
                     if(!empty($projects[$projectID]->name) and $parentProject->end != '0000-00-00' and $projects[$projectID]->end > $parentProject->end)
                     {
-                        dao::$errors['end'] =  sprintf($this->lang->project->endLetterChild, $projects[$projectID]->name, $parentProject->name, $parentProject->end);
+                        dao::$errors['end'] =  sprintf($this->lang->project->endLetterChild, $parentProject->end);
                         return false;
                     }
                 }