Zhanggong Cave was first recorded in the Spring and Autumn Period and the Warring States Period. At that time, it was called Geng Sangdong. Dr Geng Sangchu was named Geng Sangdong because he didn't want to accept Chen Jun's abdication and seclusion here. Later, Zhang Daoling in Han Dynasty and Zhang in Tang Dynasty practiced in this cave successively, so it was also called Zhanggong Cave. Located at the foot of Fengmeng Mountain