Chen's introduction

Chen, whose real name is Huai San, was born in Longde, Gansu (now Longde, Ningxia) in the Republic of China. He was born in Guangxu period of Qing Dynasty, and was born in Qing Dynasty. The Reconstruction of Longde County Records, which he presided over, recorded six precursors of earthquakes in detail, also known as "Six Mega Earthquakes". It is of practical significance to predict earthquakes through animal reactions and weather changes today. Especially after the Wenchuan earthquake in 2008, the domestic attention to earthquakes has been further improved, which has strengthened people's research on earthquakes. Some ancient books in China are also taken as research objects, among which "Six Mega Earthquakes" have the most far-reaching influence.