111 years ago today, on March 11, 1914 (February 15, 1914 in the lunar calendar), the British and Tibetans drew the McMahon Line. On March 11, 1914, at the Simla Conference, on the demarcation of Xizang, McMahon officially handed over 11 articles of the British mediation draft, which included: China has suzerainty over Xizang and recognizes that Xizang has autonomy, all internal affairs of Tibet are in the hands of the Lhasa government, China does not change Xizang to a province, and Xizang is not represented by Chinese parliamentarians or similar groups; China does not send troops to Xizang, does not station civil and military officials, and does not conduct colonial affairs; Britain and Tibet negotiate a new trade charter; the British Commercial Commission can bring guards to Lhasa at any time when necessary. The draft assigns most of Qinghai and western Sichuan to Xizang, which is then divided into Inner Tibet and Outer Tibet. China is allowed to have 100 guards in Xizang. On March 24, at the Shimla Conference, the British representative McMahon and the representative of the local government of Xizang, Lun Ching Shah Zara, in a secret exchange of letters, delineated the direction of the Sino-Indian border without authorization, that is, the "McMahon Line", and divided about 90,000 square kilometers of land in the southeast of Xizang, Luoyu and Chayu areas into India. The representative of the Beijing government stated that it would not recognize it. After India's independence, the Indian government has repeatedly made territorial claims to the Chinese government on the basis of the illegal McMahon Line.