Introduction to China's inland altitude zero point: China's inland altitude zero point is located in Bacun, Yar Township, Turpan, Xinjiang. The geographical coordinates are 89 degrees 11 minutes east longitude. At 42 degrees 56 minutes north latitude, "Zero Point" is 13 kilometers from Jiaohe Ancient City in the west, 50 kilometers from Gaochang Ancient City in the east, 2 kilometers from Sugong Pagoda in the north, and 30 kilometers from the lowest point of Ayding Lake in the south. "Zero Point" is a special geographical location. The Turpan Basin in Xinjiang is the lowest inland basin in China and the second lowest land in the world. It covers an area of 4,050 square kilometers below sea level and is defined by the zero point contour. The lowest point is -154.43 meters above sea level. The establishment of China's inland altitude zero point is of scientific significance and has the function of popularizing science. It is of great significance to the development of cultural exchanges between China and foreign countries and the development of tourism.