add req.query

+const qs = require('querystring');
 
 
 exports.index = (req, res) => {
 exports.index = (req, res) => {
-    res.redirect('http://ad.yoho.cn/html5/2016/12/redbag');
+    res.redirect('http://ad.yoho.cn/html5/2016/12/redbag/?' + qs.stringify(req.query));
 };
 };