diff --git a/templates/wechat/h5_jsapi_pay.html b/templates/wechat/h5_jsapi_pay.html
index b139713..b55f322 100644
--- a/templates/wechat/h5_jsapi_pay.html
+++ b/templates/wechat/h5_jsapi_pay.html
@@ -215,6 +215,9 @@
                     push('若含「URL未注册」，对照：微信校验 URL 必须落在商户 JSAPI 授权目录前缀下');
                     push('当前校验 URL', String(location.href || '').split('#')[0]);
                     push('调起用的 appId', appId);
+                    try {
+                        alert('支付失败诊断\n\n' + msg + '\n\nappId=' + appId + '\nURL=' + String(location.href || '').split('#')[0] + '\n\n完整日志在页面绿色区域，点「复制」');
+                    } catch (e) {}
                 }
             });
         } catch (e) {