Aksai Chin is a high-altitude, largely uninhabited cold desert plateau that is a central concept in the ongoing territorial dispute between India and China. It is a region of approximately 38,000 square kilometres located at the junction of the Tibetan Plateau and the Karakoram Range. India claims the territory as the easternmost part of the Union Territory of Ladakh, while China administers it as part of its Xinjiang Uyghur Autonomous Region and Tibet Autonomous Region.
The dispute's origin lies in the absence of a mutually agreed-upon boundary from the colonial era. The British proposed two competing lines: the Johnson Line of 1865, which placed Aksai Chin within the princely state of Jammu and Kashmir and is the basis for India's claim, and the Macartney-MacDonald Line of 1899, which assigned most of the area to China. The problem that crystallized the dispute was China's construction of the Xinjiang–Tibet Highway (China National Highway G219) across the plateau in the 1950s, which India learned of in 1957–58.
The mechanism governing the current situation is the Line of Actual Control (LAC), a notional demarcation line that separates Indian-controlled territory from Chinese-controlled territory. The LAC in the western sector is the line of control China established after the Sino-Indian War of October–November 1962, following which China retained physical control of the territory. The LAC is distinct from the formal boundary claims of both nations.
Aksai Chin connects directly to the broader Sino-Indian border dispute and the Kashmir question, which also involves Pakistan. The territory's strategic value for China is its connectivity, as the highway provides the only direct overland link between its two western regions, Xinjiang and Tibet.
The status of Aksai Chin has not changed recently, as it remains under Chinese administration with no negotiated settlement. However, China has recently made administrative changes, such as creating new counties like He'an and Hekang in December 2024 and Cenling in March 2026, which India has categorically rejected as attempts to assign fictitious names to Indian territory. The Galwan Valley clash of June 15, 2020, severely strained the existing confidence-building agreements, such as the 1993 Agreement on Maintenance of Peace and Tranquillity along the LAC.