一种梯子的搭建方法

First of all, you need a VPS of non CN IP address which you can ssh. Then Run these commands on the server side:

sudo yum install python2-pip
sudo pip install --upgrade pip
sudo pip install shadowsocks
sudo ssserver -p 443 -k yourpassword -m aes-256-cfb

After that, you need install client side and add server information, then you are ready to go!

Reference:
https://github.com/shadowsocks/shadowsocks-iOS/releases
https://github.com/shadowsocks1/shadowsocks