I'm sure you are aware, but India and China have been had continual skirmishes along the Line of Actual Control[1] since the 1960s.

It's the worst it's been for a while, but there have been pretty major incidents[2] even within the last decade.

It's a serious situation, but not unprecedented.

[1] https://en.wikipedia.org/wiki/Line_of_Actual_Control

[2] https://en.wikipedia.org/wiki/2013_Daulat_Beg_Oldi_incident