It had more to do with the mounting pressure from both US and USSR, beside Chinese leadership still hadn't decided to complete break up with India and naively believed that Indian government may come around and become China's friend again, China was isolated and desperately needed friends then.One thing has puzzled me for a long time, how China managed to rout India with such ease while the whole country was in the thick of the worst famine in the human history? Is it really what Indian army's true worth?
I think you guys by then had already gotten what you came for. Cheers.