That's nothing new. China and India have been fighting (sometimes literally) over Arunachal Pradesh since the PRC became a thing.It's truly bizarre the way they do it, too. They've got a mutual agreement to fight with literal sticks instead of guns so that it won't escalate into a full-scale war. So the border units of the Indian and Chinese armies just periodically beat the shit out of each other to show that they still both claim the territory.