The western end of Tibet reaches parts of Xinjiang, which is called Aksai Qin area, and belongs to Ali area of Tibet and Hotan area of Xinjiang in administrative division. In ancient times, it belonged to the Guge dynasty, and part of it belonged to the kingdom of Ladakh. In the Qing Dynasty, Ladakh belonged to the vassal state of the central government. This area covers an area of more than 30,000 square kilometers, which is the main road from Xinjiang to Ali area. Except for a small part occupied by Indian, it is all effectively controlled territory of China.