I hope this is not true. I might be living in China in a couple years.
Vietnam blocked FB and other sites but never lowly ol' VolNation.
The way around it is to have a VPN. I have one, but it had grown to a point that the government there had found a way to block it. Gotrusted.com is one that works, but you have to have it loaded prior to arrival as you cannot download it there. For my iPhone, I have Photon, but it is a bit slow to say the least.