diff --git a/module/custom/css/set.ui.css b/module/custom/css/set.ui.css
index 218d449dec..48318d8dec 100644
--- a/module/custom/css/set.ui.css
+++ b/module/custom/css/set.ui.css
@@ -5,3 +5,4 @@
 .lang-row .form-group > .form-label {width: var(--form-horz-label-width);}
 .unit-box .checkbox-primary {flex: 0 1 15%;}
 #gradeList {width: 50%}
+.gradeRuleNotice {margin-left: 4.25rem}
diff --git a/module/custom/lang/de.php b/module/custom/lang/de.php
index f2187484c6..24f08e802f 100644
--- a/module/custom/lang/de.php
+++ b/module/custom/lang/de.php
@@ -68,6 +68,9 @@ $lang->custom->closeGrade           = 'Close Story Grade';
 $lang->custom->activateGrade        = 'Activate Story Grade';
 $lang->custom->deleteGrade          = 'Delete Story Grade';
 
+$lang->custom->gradeRuleList['cross']     = 'Allow cross-level segmentation';
+$lang->custom->gradeRuleList['stepwise']  = 'Restriction level-by-level subdivision';
+
 $lang->custom->unitList['efficiency'] = 'Working Hours/';
 $lang->custom->unitList['manhour']    = 'Man-hour/';
 $lang->custom->unitList['cost']       = 'Yuan/Hour';
@@ -129,7 +132,8 @@ $lang->custom->story->fields['statusList']       = 'Status';
 $lang->custom->story->fields['reviewRules']      = 'Review Rules';
 $lang->custom->story->fields['reviewResultList'] = 'Review Result';
 $lang->custom->story->fields['review']           = 'Review Required';
-if($config->edition != 'open' || 1) $lang->custom->story->fields['grade'] = 'Grade Setting';
+$lang->custom->story->fields['grade']            = 'Grade Setting';
+$lang->custom->story->fields['gradeRule']        = 'Grade Rule';
 
 $lang->custom->epic        = clone $lang->custom->story;
 $lang->custom->requirement = clone $lang->custom->story;
@@ -221,6 +225,8 @@ $lang->custom->notice->closeGrade          = "After closing, the grade cannot be
 $lang->custom->notice->activateGrade       = "After activating, the grade can be used to create new stories.";
 $lang->custom->notice->gradeNotEmpty       = 'There are stories in this grade, and it cannot be deleted!';
 $lang->custom->notice->deleteGrade         = 'Are you sure you want to delete this grade?';
+$lang->custom->notice->stepwise            = 'Level-by-level subdivision: It needs to be created starting from the top requirement level and subdivided layer by layer to the last requirement level.';
+$lang->custom->notice->cross               = 'Cross-level segmentation: Requirements can be created from any requirement level and support cross-level association of parent-child relationships.';
 
 $lang->custom->notice->indexPage['product'] = "ZenTao 8.2+ has Product Homepage. Do you want to go to Product Homepage?";
 $lang->custom->notice->indexPage['project'] = "ZenTao 8.2+ has {$lang->projectCommon} Home. Do you want to go to {$lang->projectCommon} Home?";
diff --git a/module/custom/lang/en.php b/module/custom/lang/en.php
index 4b58b54392..0cab57e5ff 100644
--- a/module/custom/lang/en.php
+++ b/module/custom/lang/en.php
@@ -68,6 +68,9 @@ $lang->custom->closeGrade           = 'Close Story Grade';
 $lang->custom->activateGrade        = 'Activate Story Grade';
 $lang->custom->deleteGrade          = 'Delete Story Grade';
 
+$lang->custom->gradeRuleList['cross']     = 'Allow cross-level segmentation';
+$lang->custom->gradeRuleList['stepwise']  = 'Restriction level-by-level subdivision';
+
 $lang->custom->unitList['efficiency'] = 'Working Hours/';
 $lang->custom->unitList['manhour']    = 'Man-hour/';
 $lang->custom->unitList['cost']       = 'USD/Hour';
@@ -129,7 +132,8 @@ $lang->custom->story->fields['statusList']       = 'Status';
 $lang->custom->story->fields['reviewRules']      = 'Review Rules';
 $lang->custom->story->fields['reviewResultList'] = 'Review Result';
 $lang->custom->story->fields['review']           = 'Need Review';
-if($config->edition != 'open' || 1) $lang->custom->story->fields['grade'] = 'Grade Setting';
+$lang->custom->story->fields['grade']            = 'Grade Setting';
+$lang->custom->story->fields['gradeRule']        = 'Grade Rule';
 
 $lang->custom->epic        = clone $lang->custom->story;
 $lang->custom->requirement = clone $lang->custom->story;
@@ -221,6 +225,8 @@ $lang->custom->notice->closeGrade          = "After closing, the grade cannot be
 $lang->custom->notice->activateGrade       = "After activating, the grade can be used to create new stories.";
 $lang->custom->notice->gradeNotEmpty       = 'There are stories in this grade, and it cannot be deleted!';
 $lang->custom->notice->deleteGrade         = 'Are you sure you want to delete this grade?';
+$lang->custom->notice->stepwise            = 'Level-by-level subdivision: It needs to be created starting from the top requirement level and subdivided layer by layer to the last requirement level.';
+$lang->custom->notice->cross               = 'Cross-level segmentation: Requirements can be created from any requirement level and support cross-level association of parent-child relationships.';
 
 $lang->custom->notice->indexPage['product'] = "ZenTao 8.2+ has Product Home. Do you want to go to Product Home?";
 $lang->custom->notice->indexPage['project'] = "ZenTao 8.2+ has {$lang->projectCommon} Home. Do you want to go to {$lang->projectCommon} Home?";
diff --git a/module/custom/lang/fr.php b/module/custom/lang/fr.php
index faf7660b53..e0043eb458 100644
--- a/module/custom/lang/fr.php
+++ b/module/custom/lang/fr.php
@@ -68,6 +68,9 @@ $lang->custom->closeGrade           = 'Close Story Grade';
 $lang->custom->activateGrade        = 'Activate Story Grade';
 $lang->custom->deleteGrade          = 'Delete Story Grade';
 
+$lang->custom->gradeRuleList['cross']     = 'Allow cross-level segmentation';
+$lang->custom->gradeRuleList['stepwise']  = 'Restriction level-by-level subdivision';
+
 $lang->custom->unitList['efficiency'] = 'Working Hours/';
 $lang->custom->unitList['manhour']    = 'Man-hour/';
 $lang->custom->unitList['cost']       = 'Yuan/Hour';
@@ -129,7 +132,8 @@ $lang->custom->story->fields['statusList']       = 'Statut';
 $lang->custom->story->fields['reviewRules']      = 'Review Rules';
 $lang->custom->story->fields['reviewResultList'] = 'Valider Résultats';
 $lang->custom->story->fields['review']           = 'Validation Requise';
-if($config->edition != 'open' || 1) $lang->custom->story->fields['grade'] = 'Grade Setting';
+$lang->custom->story->fields['grade']            = 'Grade Setting';
+$lang->custom->story->fields['gradeRule']        = 'Grade Rule';
 
 $lang->custom->epic        = clone $lang->custom->story;
 $lang->custom->requirement = clone $lang->custom->story;
@@ -221,6 +225,8 @@ $lang->custom->notice->closeGrade          = "After closing, the grade cannot be
 $lang->custom->notice->activateGrade       = "After activating, the grade can be used to create new stories.";
 $lang->custom->notice->gradeNotEmpty       = 'There are stories in this grade, and it cannot be deleted!';
 $lang->custom->notice->deleteGrade         = 'Are you sure you want to delete this grade?';
+$lang->custom->notice->stepwise            = 'Level-by-level subdivision: It needs to be created starting from the top requirement level and subdivided layer by layer to the last requirement level.';
+$lang->custom->notice->cross               = 'Cross-level segmentation: Requirements can be created from any requirement level and support cross-level association of parent-child relationships.';
 
 $lang->custom->notice->indexPage['product'] = "ZenTao 8.2+ possède une page d'accueil. Voulez-vous consulter la page d'accueil du produit ?";
 $lang->custom->notice->indexPage['project'] = "ZenTao 8.2+ has {$lang->projectCommon} Home. Do you want to go to {$lang->projectCommon} Home?";
diff --git a/module/custom/lang/zh-cn.php b/module/custom/lang/zh-cn.php
index a3fd358938..a107979a8b 100644
--- a/module/custom/lang/zh-cn.php
+++ b/module/custom/lang/zh-cn.php
@@ -68,6 +68,9 @@ $lang->custom->closeGrade           = '停用需求层级';
 $lang->custom->activateGrade        = '启用需求层级';
 $lang->custom->deleteGrade          = '删除需求层级';
 
+$lang->custom->gradeRuleList['cross']     = '允许跨层级细分';
+$lang->custom->gradeRuleList['stepwise']  = '限制逐层级细分';
+
 $lang->custom->unitList['efficiency'] = '工时/';
 $lang->custom->unitList['manhour']    = '人时/';
 $lang->custom->unitList['cost']       = '元/小时';
@@ -129,7 +132,8 @@ $lang->custom->story->fields['statusList']       = '状态';
 $lang->custom->story->fields['reviewRules']      = '评审规则';
 $lang->custom->story->fields['reviewResultList'] = '评审结果';
 $lang->custom->story->fields['review']           = '评审流程';
-if($config->edition != 'open' || 1) $lang->custom->story->fields['grade'] = '层级设置';
+$lang->custom->story->fields['grade']            = '层级设置';
+$lang->custom->story->fields['gradeRule']        = '细分流程';
 
 $lang->custom->epic        = clone $lang->custom->story;
 $lang->custom->requirement = clone $lang->custom->story;
@@ -221,6 +225,8 @@ $lang->custom->notice->closeGrade          = "停用后，该层级无法再创
 $lang->custom->notice->activateGrade       = "启用后，该层级可以创建新需求。";
 $lang->custom->notice->gradeNotEmpty       = '系统内存在该层级的需求，不能删除！';
 $lang->custom->notice->deleteGrade         = '层级删除后无法恢复！';
+$lang->custom->notice->stepwise            = '逐层细分：需从顶级需求层级开始创建，逐层细分至最后一个需求层级。';
+$lang->custom->notice->cross               = '跨层细分：可从任意需求层级创建需求，并支持跨层级关联父子关系。';
 
 $lang->custom->notice->indexPage['product'] = "从8.2版本起增加了产品主页视图，是否默认进入产品主页？";
 $lang->custom->notice->indexPage['project'] = "从8.2版本起增加了{$lang->projectCommon}主页视图，是否默认进入{$lang->projectCommon}主页？";
diff --git a/module/custom/ui/set.html.php b/module/custom/ui/set.html.php
index 6020abb1da..e589957df9 100644
--- a/module/custom/ui/set.html.php
+++ b/module/custom/ui/set.html.php
@@ -71,6 +71,24 @@ elseif(in_array($module, array('story', 'requirement', 'epic')) && $field == 're
         set::items($users)
     );
 }
+elseif(in_array($module, array('story', 'requirement', 'epic')) && $field == 'gradeRule')
+{
+    $formItems[] = formGroup
+    (
+        set::width('1/2'),
+        set::label($lang->custom->story->fields['gradeRule']),
+        set::name('gradeRule'),
+        set::value($gradeRule),
+        set::control('radioListInline'),
+        set::items($lang->custom->gradeRuleList)
+    );
+    $formItems[] = div
+    (
+        setClass('gradeRuleNotice'),
+        div($lang->custom->notice->cross),
+        div($lang->custom->notice->stepwise)
+    );
+}
 elseif(in_array($module, array('epic', 'story', 'requirement', 'testcase')) && $field == 'review')
 {
     $formItems[] = formGroup
diff --git a/module/custom/zen.php b/module/custom/zen.php
index d5ac5d391c..dc5bc347df 100644
--- a/module/custom/zen.php
+++ b/module/custom/zen.php
@@ -88,6 +88,11 @@ class customZen extends custom
             $this->view->users          = $this->loadModel('user')->getPairs('noclosed|nodeleted');
             $this->view->superReviewers = zget($this->config->$module, 'superReviewers', '');
         }
+        if(in_array($module, array('story', 'requirement', 'epic')) && $field == 'gradeRule')
+        {
+            $this->app->loadConfig($module);
+            $this->view->gradeRule = zget($this->config->$module, 'gradeRule', '');
+        }
         if(in_array($module, array('story', 'requirement', 'epic')) && $field == 'grade')
         {
             $this->view->storyGrades = $this->loadModel('story')->getGradeSetting($module);
@@ -151,6 +156,10 @@ class customZen extends custom
         {
             $this->setStoryReview($module, $data);
         }
+        elseif(in_array($module, array('story', 'requirement', 'epic')) && $field == 'gradeRule')
+        {
+            $this->setGradeRule($module, $data);
+        }
         elseif(in_array($module, array('story', 'requirement', 'epic')) && $field == 'grade')
         {
             $this->custom->setStoryGrade($module, $data);
@@ -340,6 +349,21 @@ class customZen extends custom
         return !dao::isError();
     }
 
+    /**
+     * 设置需求细分流程。
+     * Set the rule of story grade.
+     *
+     * @param  string    $module
+     * @param  array     $data
+     * @access protected
+     * @return bool
+     */
+    public function setGradeRule(string $module, array $data): bool
+    {
+        $this->loadModel('setting')->setItems("system.{$module}@{$this->config->vision}", $data);
+        return !dao::isError();
+    }
+
     /**
      * 设置用例评审规则。
      * Set testcase review rules.