The Tibet Autonomous Region (TAR), referred to as "Tibet", is located in the southwestern border, neighboring Xinjiang, Qinghai, Sichuan and Yunnan, and bordering Myanmar, India, Bhutan, Nepal and Kashmir, with a national border of more than 4,000 kilometers, and is an important national security barrier and ecological security barrier. It is an important national security barrier and ecological security barrier, and its strategic position is very important. The Tibet Autonomous Region covers a total area of 1,202,800 square kilometers, accounting for about one-eighth of the country's total area, second only to Xinjiang. It now has six cities (Lhasa, Shigatse, Shannan, Linzhi, Chamdo and Nagchu) and one region (Ali), with 74 counties (districts), and Lhasa as its capital.At the end of 2021, the resident population of the whole region amounted to 3.66 million people, and in addition to the Tibetans and Han Chinese, there are also Hui, Menba, Lhoba, Naxi, Sherpa, and Jurchen, etc. The Tibetan population accounts for about 90% of the total. Tibetan population accounts for about 90%, Han Chinese about 8%, and other ethnic minorities about 2%.