Let's not mistake fistfights with war. PLA's rocket force/arty poses credible threat. They backed off because any misadventure will result in death of many Han soldiers which a nation that hasn't been in conflict for four decades is afraid of.
PLA and China in its entire history never cared about the number of dead Chinese soldiers. They care about strategic gains, not number of dead soldiers. If you think Chinese don't have stomach for war, you don't know PRC/PLA
If anyone who didn't have stomach for conflict in China/India dynamics, its India and Indian population.