diff --git a/application/api/controller/Index.php b/application/api/controller/Index.php
index cf7d253..43ba80c 100644
--- a/application/api/controller/Index.php
+++ b/application/api/controller/Index.php
@@ -243,7 +243,7 @@ class Index extends Api
             $num = '001';
         } else {
             if (strstr($arr[3], '00')) {
-                echo substr ($arr[3],1,3);
+                echo substr ($arr[3],1,4);
                 echo '1';
                 die;
             }