Introduction to Zhazi Cave: Zhazi Cave is located in the Ciqikou and Wulingguan area at the foot of Gele Mountain in Chongqing. Since 1938, it has been used by the Kuomintang secret service to detain and persecute revolutionaries. Zhazi Cave is divided into two courtyards: an inner courtyard and an outer courtyard. The inner courtyard has 16 men's cells on one floor and one floor, and two bungalows for women. The outer courtyard houses the spy office and torture room.