evidence: Britain, Tibet and China met to negotiate the borders of India and her northern neighbours. The treaty gave secular control of Qinghai to China and recognised the autonomy of the rest of Tibet. China refused to sign as a result of south Tibet being ceded to British India. [...] This affirmed Chinese sovereignty over Tibet and stated that China would not "alter the existing political system in Tibet" and that "in matters relating to various reforms in Tibet there would be no compulsion on the part of the central authorities". [...] One of Tibet’s three provinces, U-Tsang, was formally inaugurated as the Tibet Autonomous Region (TAR). Along with Amdo and Kham, historical Tibet was about the size of western Europe. The former was renamed Qinghai and the latter incorporated into the Chinese provinces of Sichuan, Gansu and Yunnan.