麦克马洪线
In 1913–1914, representatives of the "de facto" independent state of Tibet and Britain met in India to define the borders of 'Outer Tibet' (with respect to China). British administrator Sir Henry McMahon drew the McMahon Line as the border between British India and Tibet, placing Tawang and other areas within British India. The Tibetan and British representatives devised the Simla Accord including the McMahon Line, but the Chinese representatives did not concur. The Simla Accord denies other benefits to China while it declines to assent to the Accord.