Liu Wenhui
In 1932, an agreement signed between Chinese warlord Liu Wenhui and Tibetan forces formalized the partition of Kham into two regions: Eastern Kham, which was administered by Chinese forces, and Western Kham, which was administered by Tibet. Eastern Kham subsequently became the actual area of control of China's Xikang province. The border between eastern and western Kham is the Upper Yangtze - "Dri Chu" in Tibetan and "Jinsha Jiang" respectively, in Chinese.