whether to coexist peacefully with India and settle the border dispute in the next 3 years
or if not possible, maybe it is time to sabotage India from every possible angle. India has so many of weak points that China can easily exploit. Right now India is taking its military out from Pakistan theatre to focus on China because India think Pakistan is mired in its own domestic problems now. China need to proactively encourage Pakistan to solve its domestic problem, and also maybe it is time to give Pakistan military aid just like uncle sam is giving to Israel every year. China need a strong Pakistan to scare the shit out of India. Meanwhile China can also send clandistine operation to support separatists in India.
No need to play nice anymore if India want to play rough. Joining the quad and sending warships to SCS is sending a message that India want to play rough. Some skrimishes in the border area is not enough of a response. It didn't change anything except encourage India to prepare.