diff --git a/module/help/lang/field.en.php b/module/help/lang/field.en.php
index b09460a60b..eda06c3b66 100644
--- a/module/help/lang/field.en.php
+++ b/module/help/lang/field.en.php
@@ -98,6 +98,8 @@ $help->project->team   = 'Team name';
 $help->project->status = 'Project status|Only runing projects can appears in the home page';
 $help->project->desc   = 'Description';
 $help->project->goal   = 'The goal of the project';
+$help->project->updateburn = 'Update burn down chart|<br />1. Click the "update burndown" link to update it manually.<br />2. Update it by cron.
+                              for more, see <a href="http://www.zentao.net/help-book-zentaopmshelp.html" target="_blank">How to update burndown chart</a>.';
 
 $help->release->product = 'Product';
 $help->release->build   = 'Build|The related build.';
diff --git a/module/help/lang/field.zh-cn.php b/module/help/lang/field.zh-cn.php
index 0ca3436362..31acddf80c 100644
--- a/module/help/lang/field.zh-cn.php
+++ b/module/help/lang/field.zh-cn.php
@@ -90,14 +90,16 @@ $help->productplan->desc    = '描述|可以对计划进行较详细的描述。
 $help->productplan->begin   = '开始日期|计划开始的日期。';
 $help->productplan->end     = '结束日期|计划结束的日期。';
 
-$help->project->name   = '项目名称';
-$help->project->code   = '项目代号|项目的代码，作为团队内部对某一个项目的简短称呼。';
-$help->project->begin  = '开始日期|项目一般应该有明确的起止时间。';
-$help->project->end    = '结束日期|对于scrum而言，一般不宜超过30天。';
-$help->project->team   = '团队名称|团队内部可以自己选择自己喜欢的名称。';
-$help->project->status = '项目状态|只有状态为进行中的项目，其燃烧图才会在首页出现。';
-$help->project->desc   = '项目描述|项目的描述。';
-$help->project->goal   = '项目目标|项目所要取得的目标。';
+$help->project->name       = '项目名称';
+$help->project->code       = '项目代号|项目的代码，作为团队内部对某一个项目的简短称呼。';
+$help->project->begin      = '开始日期|项目一般应该有明确的起止时间。';
+$help->project->end        = '结束日期|对于scrum而言，一般不宜超过30天。';
+$help->project->team       = '团队名称|团队内部可以自己选择自己喜欢的名称。';
+$help->project->status     = '项目状态|只有状态为进行中的项目，其燃烧图才会在首页出现。';
+$help->project->desc       = '项目描述|项目的描述。';
+$help->project->goal       = '项目目标|项目所要取得的目标。';
+$help->project->updateburn = '更新燃尽图|<br />1. 通过手工点击“更新燃尽图”来进行更新。<br />2. 通过计划任务来进行更新。
+                              详情请查看<a href="http://www.zentao.net/help-book-zentaopmshelp.html" target="_blank">《如何更新燃尽图》</a>';
 
 $help->release->product = '产品';
 $help->release->build   = 'build|所对应的build。build是在项目视图中，在某一个项目中创建。';
diff --git a/module/help/lang/field.zh-tw.php b/module/help/lang/field.zh-tw.php
index af7e8e7b35..fe138d6d5a 100644
--- a/module/help/lang/field.zh-tw.php
+++ b/module/help/lang/field.zh-tw.php
@@ -90,14 +90,16 @@ $help->productplan->desc    = '描述|可以對計划進行較詳細的描述。
 $help->productplan->begin   = '開始日期|計劃開始的日期。';
 $help->productplan->end     = '結束日期|計劃結束的日期。';
 
-$help->project->name   = '項目名稱';
-$help->project->code   = '項目代號|項目的代碼，作為團隊內部對某一個項目的簡短稱呼。';
-$help->project->begin  = '開始日期|項目一般應該有明確的起止時間。';
-$help->project->end    = '結束日期|對於scrum而言，一般不宜超過30天。';
-$help->project->team   = '團隊名稱|團隊內部可以自己選擇自己喜歡的名稱。';
-$help->project->status = '項目狀態|只有狀態為進行中的項目，其燃燒圖才會在首頁出現。';
-$help->project->desc   = '項目描述|項目的描述。';
-$help->project->goal   = '項目目標|項目所要取得的目標。';
+$help->project->name       = '項目名稱';
+$help->project->code       = '項目代號|項目的代碼，作為團隊內部對某一個項目的簡短稱呼。';
+$help->project->begin      = '開始日期|項目一般應該有明確的起止時間。';
+$help->project->end        = '結束日期|對於scrum而言，一般不宜超過30天。';
+$help->project->team       = '團隊名稱|團隊內部可以自己選擇自己喜歡的名稱。';
+$help->project->status     = '項目狀態|只有狀態為進行中的項目，其燃燒圖才會在首頁出現。';
+$help->project->desc       = '項目描述|項目的描述。';
+$help->project->goal       = '項目目標|項目所要取得的目標。';
+$help->project->updateburn = '更新燃盡圖|<br />1. 通過手工點擊“更新燃盡圖”來進行更新。<br />2. 通過計劃任務來進行更新。
+                              詳情請查看<a href="http://www.zentao.net/help-book-zentaopmshelp.html" target="_blank">《如何更新燃盡圖》</a>';
 
 $help->release->product = '產品';
 $help->release->build   = 'build|所對應的build。build是在項目視圖中，在某一個項目中創建。';
diff --git a/module/index/view/index.html.php b/module/index/view/index.html.php
index 1a8774a613..275377161d 100644
--- a/module/index/view/index.html.php
+++ b/module/index/view/index.html.php
@@ -47,6 +47,7 @@
               echo html::a($this->createLink('project', 'browse', "projectid=$project->id"), $project->name);
               common::printLink('project', 'burn', "projectID=$project->id", $lang->project->largeBurnChart);
               common::printLink('project', 'computeBurn', 'reload=yes', $lang->project->computeBurn, 'hiddenwin');
+              printf($lang->project->howToUpdateBurn, $this->createLink('help', 'field', 'module=project&method-burn&field=updateburn'));
               ?>
             </div>
             <?php endforeach;?>
diff --git a/module/project/lang/en.php b/module/project/lang/en.php
index 07b7c67e9c..82da2bec83 100644
--- a/module/project/lang/en.php
+++ b/module/project/lang/en.php
@@ -96,7 +96,6 @@ $lang->project->groups['openedby']  = 'Group by openedBy';
 $lang->project->groups['assignedTo']= 'Group by assignedTo';
 $lang->project->groups['finishedby']= 'Group by finishedBy';
 $lang->project->groups['closedby']  = 'Group by closedBy';
-
 $lang->project->groups['estimate']  = 'Group by estimate';
 $lang->project->groups['consumed']  = 'Group by consumed';
 $lang->project->groups['left']      = 'Group by left';
@@ -117,6 +116,7 @@ $lang->project->oneLineStats   = "Project『%s』, code is『%s』, products is
 $lang->project->storySummary   = "Total 『%s』stories, estimate『%s』hours.";
 $lang->project->wbs            = "WBS";
 $lang->project->largeBurnChart = 'View large';
+$lang->project->howToUpdateBurn= "<a href='%s' class='helplink'><i>How?</i></a>";
 
 /* Confirm. */
 $lang->project->confirmDelete         = 'Are you sure to delete project [%s]?';
diff --git a/module/project/lang/zh-cn.php b/module/project/lang/zh-cn.php
index a342deb18d..0721ba3753 100644
--- a/module/project/lang/zh-cn.php
+++ b/module/project/lang/zh-cn.php
@@ -116,6 +116,7 @@ $lang->project->oneLineStats   = "项目『%s』, 代号为『%s』, 相关产
 $lang->project->storySummary   = "共『%s』个需求，预计『%s』个工时。";
 $lang->project->wbs            = "分解任务";
 $lang->project->largeBurnChart = '点击查看大图';
+$lang->project->howToUpdateBurn= "<a href='%s' class='helplink'><i>如何更新?</i></a>";
 
 /* 交互提示。*/
 $lang->project->confirmDelete         = '您确定删除项目[%s]吗？';
diff --git a/module/project/view/burn.html.php b/module/project/view/burn.html.php
index e6290a0f73..5b588503c0 100644
--- a/module/project/view/burn.html.php
+++ b/module/project/view/burn.html.php
@@ -15,6 +15,7 @@
   <?php
   echo $charts; 
   common::printLink('project', 'computeBurn', 'reload=yes', $lang->project->computeBurn, 'hiddenwin');
+  printf($lang->project->howToUpdateBurn, $this->createLink('help', 'field', 'module=project&method-burn&field=updateburn'));
   ?>
 </div>
 <script language='Javascript'>createChart1();</script>