Pic Description: Ali is located in the southwest border region, located in the western Tibet Autonomous Region, north of Xinjiang Uygur Autonomous Region, southern Nepal and India and the mud adjacent to the east, Xigaze, Nagqu, the West and Kashmir and other border areas. Something about 600 km north-south width of 500 km, an area of 305,000 square kilometers, accounting for a quarter of the total area of the Tibet Autonomous Region. Average elevation of 4,500 meters, known as "the roof of the world's roof." Region mountain horizon, Xuefeng everywhere in the north of Kunlun Mountains and the Karakoram mountain range, stretching from west to east; central Gangdise Mountains from northwest to southeast diagonal consistent throughout; southern Himalayas Stretching from northwest to southeast in India, Nepal border. 1116 km long border, outside the road pass through nearly 60, the formation of the southwest border of a natural barrier, is very important strategically.