diff --git a/webapp/controller/ShopController.class.php b/webapp/controller/ShopController.class.php
index 0b94d1ed..653e0c89 100644
--- a/webapp/controller/ShopController.class.php
+++ b/webapp/controller/ShopController.class.php
@@ -50,10 +50,6 @@ use models\BcOrder;
 use services\LogService;
 use services\ShopAddItemService;
 
-use function phpcommon\bnAdd_s;
-use function phpcommon\bnDiv_s;
-use function phpcommon\bnInit;
-
 if (!function_exists('array_column')) {
     function array_column($arr2, $column_key)
     {
@@ -421,7 +417,7 @@ class ShopController extends BaseAuthedController
         $order_id_base = date('YmdHis') . "10000000";
         $divIdx = ($lastId) % 9999999;
 
-        $order_id = bnAdd_s($order_id_base, $divIdx);
+        $order_id = phpcommon\bnAdd_s($order_id_base, $divIdx);
         $test = SqlHelper::update($conn, 't_web2_order', array('idx' => $lastId), array('order_id' => $order_id));
         if (!$test) {
             $this->_rspErr(5, "start purchase failed");