diff --git a/module/common/model.php b/module/common/model.php
index a10deb00ff..5340fac145 100644
--- a/module/common/model.php
+++ b/module/common/model.php
@@ -794,7 +794,7 @@ class commonModel extends model
                         substr_count((string)$old->$key, "\n") > 1 or
                         strpos('name,title,desc,spec,steps,content,digest,verify,report,definition,analysis,summary,prevention,resolution,outline,schedule,minutes', strtolower($key)) !== false)
                     {
-                        $diff = commonModel::diff($old->$key, $value);
+                        $diff = commonModel::diff((string)$old->$key, (string)$value);
                     }
                     $changes[] = array('field' => $key, 'old' => $old->$key, 'new' => $value, 'diff' => $diff);
                 }
diff --git a/module/product/control.php b/module/product/control.php
index b78761befc..60fef39cf9 100755
--- a/module/product/control.php
+++ b/module/product/control.php
@@ -270,7 +270,7 @@ class product extends control
 
         /* 获取要修改的产品ID列表。*/
         $productIdList = $this->post->productIDList;
-        if(empty($productIdList)) return print(js::locate($this->session->productList, 'parent'));
+        if(empty($productIdList)) return $this->locate($this->session->productList);
 
         /* Set menu when page come from program. */
         if($this->app->tab == 'program') common::setMenuVars('program', 0);
diff --git a/module/product/zen.php b/module/product/zen.php
index 9d84445a87..a72f02d255 100644
--- a/module/product/zen.php
+++ b/module/product/zen.php
@@ -541,8 +541,8 @@ class productZen extends product
      * 编辑完成后，做页面跳转。
      * Locate after edit product.
      *
-     * @param  int   $productID
-     * @param  int   $programID
+     * @param  int     $productID
+     * @param  int     $programID
      * @access private
      * @return array
      */
@@ -749,6 +749,7 @@ class productZen extends product
     {
         /* Get location. */
         $location = $this->createLink('program', 'product', "programID=$programID");
+        if(empty($programID)) $location = $this->createLink('program', 'productView');
         if($this->app->tab == 'product') $location = $this->createLink('product', 'all');
         return array('result' => 'success', 'message' => $this->lang->saveSuccess, 'load' => $location);
     }
diff --git a/module/program/control.php b/module/program/control.php
index 0acb12d2aa..f41f1eefca 100644
--- a/module/program/control.php
+++ b/module/program/control.php
@@ -98,10 +98,10 @@ class program extends control
     public function product(int $programID = 0, string $browseType = 'noclosed', string $orderBy = 'order_asc', int $recTotal = 0, int $recPerPage = 15, int $pageID = 1)
     {
         $programPairs = $this->program->getPairs();
-        if(!isset($programPairs[$programID]))
+        if($programID && !isset($programPairs[$programID]))
         {
             if(defined('RUN_MODE') && RUN_MODE == 'api') return $this->send(array('status' => 'fail', 'message' => '404 Not found'));
-            return print(js::error($this->lang->notFound) . js::locate($this->createLink('program', 'browse')));
+            return $this->send(array('result' => 'fail', 'message' => $this->lang->notFound, 'load' => $this->createLink('program', 'browse')));
         }
 
         $programID = $this->program->checkAccess($programID, $programPairs);