Roads and rail tracks to transport troops and weapons won't bring peace, just like building air and missile bases in Tibet, or ports and surveillance stations around Indias coasts won't. China started it and India is reacting on these actions!
We modernise airfields and infrastructure like you did, we place new fighter squads like you did, we build new air defense and surveillance alongside the borders and we place troops in that reagion as well.
In your situation we might did the same, because one must be very naive to not see the growth of Indias military, because sooner or later we will pose a threat to China. Chinese gov and forces already acknowledges it and risking trouble with India on a diplomatic level for now, might still be the better solution that just sit and wait. But that is the point, with our experience with you of the past, we won't just sit and wait either!