You can try to bring foreign investment in south Tibet, but I don't think they will put money in that region knowing their money is at big risk. Business is business. They have to think about protecting their investment. Pakistan only connects China through Kashmir and India's claim is to cut off this lifeline, that motive is so evil, besides, we all know the majority of Kashmiris want to be with Pakistan, the only trouble area in that region is India occupied Kashmir. Forget about taking Pakistan's part of Kashmir, India now can not even hold on to India occupied Kashmir.
That region is the only place where China and Pakistan being connected, India's claim to to cut off all contact between the two countries, a very evil and also naive move.