diff --git a/module/common/model.php b/module/common/model.php
index e87164f1e0..27c126786f 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -3113,6 +3113,7 @@ EOF;
 
         if(empty($object)) return true;
 
+        /* Judge that if the closed object(product|execution) is readonly from config table. The default is can modify. */
         if($type == 'product'   and empty($config->CRProduct)   and $object->status == 'closed') return false;
         if($type == 'execution' and empty($config->CRExecution) and $object->status == 'closed') return false;
 
diff --git a/module/custom/control.php b/module/custom/control.php
index f03210e453..f5c6ea0106 100644
--- a/module/custom/control.php
+++ b/module/custom/control.php
@@ -523,7 +523,7 @@ class custom extends control
     }
 
     /**
-     * Set whether the execution is read-only.
+     * Set whether the closed execution is read-only.
      *
      * @access public
      * @return void
@@ -543,7 +543,7 @@ class custom extends control
     }
 
     /**
-     * Set whether the product is read-only.
+     * Set whether the closed product is read-only.
      *
      * @access public
      * @return void