The origin of the earth, also known as the base point of the earth, is the starting point and the base point of the national geographical coordinates - longitude and latitude. The origin of the earth is a point defined by man, and it is to establish a unified coordinate system of the country by the method of Gaussian plane right angle coordinates, using the "1980 national coordinate system", referred to as "80 system", also known as "1980 Xi'an coordinate system". In the 1970s, China decided to establish its own independent earth coordinate system. Through field visits and comprehensive analysis, the original location of China's earth was finally determined in Beiliu Village, Yongle Town, Fuyang County, Shaanxi Province.