Not a fan of the Chinese government, but why does the article say this is a “perceived” border? Either it’s an agreed upon border established by treaties or whatnot, or it’s not.
https://en.wikipedia.org/wiki/Sino-Indian_border_dispute
https://en.wikipedia.org/wiki/Line_of_Actual_Control
Looks like the border has been in dispute since the 1962 Sino-Indian war.
Looks like the border is in dispute in the 2020 Sino-Indian war.