Looks we are using different dictionary.
If you want to position where you are, why should you forward the troops? If you've never been there, how can you declare that is yours?
This is a mutual agreement with Myanmar government as a result of negotiations of gives and takes.
Chou Enlai mentioned that McMahon line might be acceptable on Sino-India boarder but one had to know where exactly the line was, because India, funny enough at that time, drew the boundary
willfully, as if it were British colonist of 100+ year ago.
Yet, your great democratic elected Nehru said No and my map was your map.
Thus he deserves the pinch of 1961. He is well served due to his and his politicians stupidity...