Well, they can't really completely prevent people from using VPNs, only prevent them from downloading them, and maybe block connections to known VPN IPs (which are not static anyway). But you can simply have an installer on a USB stick and pass it around, allowing people to install the client without having to download it.
I would recommend Astrill, if you ever need a replacement. Been using it for a year, and has worked very solidly for me.