I actually did a Soviet-Chinese campaign-mostly infantry based-set in 1956. It was actually one of the most fun campaigns I've played with battles reminding the Eastern front of WW2. I have posted one mission of that campaign here (The crossing the Amur thread...)
Locationwise, it should only really affect Vietnam as Hainan is pretty much shielded by them and the Chinese coast. Unless they push that boundary out past the Paracel Islands its pretty much their sphere of influence anyway.