修改代金券编码规则

frontend/controllers/InsurerController.php

@@ -3564,7 +3564,7 @@ class InsurerController extends BaseController
         //礼券
         if ($gift_info && $gift_info->type_id == 2) {
             $pinyin_arr = explode(' ', $gift_info->pinyin_name);
-            $liquan_str = 'ch';
+            $liquan_str = 'wf';
             //获取礼券拼音首字母
             foreach ($pinyin_arr as $first) {
                 $liquan_str .= substr($first, 0, 1);