There was kind of war back in 1969:http://en.wikipedia.org/wiki/Sino-Sovie
I do not mean China vs USSR, they are very friendly at the start of the game and you can make allies instantly.
Besides the Sino-Soviet confict was just a few border clashes with less than 200 dead per side anyway, not all out war.
What I am meaning is china attacking other non USSR aligned Asian countries and colonies: South Korea, Taiwan, South Vietam etc
Even if I turn volatility to low it still happens and it is very annoying.