diff --git a/application/api/controller/Aiarticle.php b/application/api/controller/Aiarticle.php
index e296272..473049f 100644
--- a/application/api/controller/Aiarticle.php
+++ b/application/api/controller/Aiarticle.php
@@ -1143,6 +1143,10 @@ class Aiarticle extends Base
         return $aResult;
     }
 
+    /**
+     * 字符串处理
+     * @param article_id 文章ID
+     */
     private function truncateByBytes($str, $maxBytes) {
         $len = 0;
         $result = '';
@@ -1160,7 +1164,6 @@ class Aiarticle extends Base
             $len += $charBytes;
             $i++;
         }
-        
         return $result;
     }