Macartney–MacDonald Line

The Macartney–MacDonald Line was a boundary proposal by the British Raj for the border between the princely state of Jammu and Kashmir and the Chinese territories of Xinjiang and Tibet. Broadly, it represented the watershed between the Indus River system and the rivers draining into the Tarim basin (the Yarkand and Karakash rivers). The line was proposed by British Indian Government to China in 1899 via its envoy in China, Sir Claude MacDonald. The Chinese Government never gave any response to the proposal. The Indian Government believed that, subsequently British India reverted to its traditional boundary, the Johnson–Ardagh Line. Independent scholars have not confirmed the claim.

It remains relevant today as a possible resolution for the Sino-Indian border dispute in the region of Aksai Chin.