免费好用的vpn，但在中国联通环境下dns被墙很严重（他们的免费vpn都是网址形式的)，建议开发者后期优化一下
Free and easy to use,but get blocked easily in China Unicom's network(for setupvpn's vpn uses dns to connect,if 8.8.8.8 get blocked,then everything gets blocked!) Hope this problem could be soon fixed!