In the so-called Borderless Frontier today, on July 3, 1914 (Lunar Calendar, May 11, 1914), the British McMahon Tibetan local government officially signed the Treaty of Simmara. On July 3, 1914, the British representative of McMahon with the Tibetan local government representative of Leningrad Shotora officially signed the Treaty of Simmara. In the late year of the Qing Dynasty, the British representative of McMahon proposed a so-called solution that after the Xinjiang Revolution, the Chinese internal affairs were not allowed to reside in Tibet, "the Tibetan internal affairs were temporarily supervised by the Indian government", and the British government refused to accept the so-called "independence" of Tibet. In October 1913, the British and Tibetan local representatives