There are some serious flaws in your reply
1. China cant use rocket artillary in arunachal pradesh due to high mountains. It simply isnt possible. Tanks well there are no roads in India (they have crappy roads compared to china sure will break couple of backs to reach its destination
)
If pakistan attacks India, it asking for trouble and you know it.. Nato is itching to start a fight and as you know after the OSAMA incident NATO is wary even Chinese are wary of them. (I can say that the whole world is afraid of pakistanis)
Pakistan will not attack with this government that is for sure when they have no economy
As for china border mechanisms are too complex for your tiny brain.
Invasion is costly especially when people are trying to nail china on human rights. any bad move today and china can collapse just like dominos effect. Its all connected. Any sanctions on export like done in Iran would be BAD and chinese will not risk it. Time has changed since 1962.