Maybe you have heard about the China Great Firewall , Many websites are blocked there.
Some VPN protocols are also blocked.
But OpenVPN and CiscoVPN work there, So try them to see which one works better for you.
We also recommend you to try PPTP and L2TP too.
You can find more information here
If you would like to try the service before you pay, Send us and email and ask for a free trial account
info -at- saturnvpn.com