Today, 35 years ago, on October 8, 1990 (August 20, 1990), the site of the great earthquake was discovered thousands of years ago. Senior engineer Chen Kenshin and other scientific and technological personnel recently worked in Yangtze County earthquake area, discovered the earthquake of the great earthquake of 512 AD and its remnants. This earthquake was discovered in the area north of Yangtze County, up to the end of Yangtze Mountain, with a length of more than 120 kilometers, and distributed a large number of layers, earthquake slopes, grooves, and earthquake spray and earthquake collapse slopes, etc. The slopes also disconnected the ancient surface of the late North Wei period. This finding is important for the study of the earthquake danger of the Great Ba