LOL! Actually, though, I have seen a couple of three-way knife fights, as well as a memorable five-way!! (Drugs and alcohol may have been involved...)
But you are correct that China is critical in restraining India- if it were only India and Pakistan, there would now be a very large depression where Pakistan used to be.
The Chinese are not stupid. I'd bet that they're sitting back, rubbing their hands over a hot kettle of tea, just waiting to see the unfolding events between Inja and Paki.
China will pick its teeth on the survivors' bones.
W, C, P, R, R better be on mental full alert for a long time.