At the foot of Gele Mountain in Chongqing, it is 2.5 kilometers away from Baigong Pass. Zhazidong was originally a small coal mine in the suburbs of Chongqing, named after more slag and less coal. Zhazidong is surrounded by mountains on three sides and ditches on one side, and its location is relatively hidden. 1939, the Kuomintang military spy forced the mine owner to death and occupied the coal kiln, and set up a prison here. It is divided into two houses, the outer court is the spy office and torture room, the inner court has room 16, the first floor and the first floor are men's cells, and the two bungalows are women's cells.

After Bai Mansion was changed into the third guest house of SACO on 1943, the political prisoners in custody had to move out. Shen Zui, the general affairs director of the military system, personally looked around in a jeep, and finally chose the dross cave as the new place where the former Baigongguan detention center held prisoners. 1July, 946, Xifeng prison and Wanglongmen detention center were abolished, and Xifeng, Wanglongmen, Zhazidong prison and detention center were merged into Zhazidong prison and detention center, and all the detainees in Xifeng, Wanglongmen prison and detention center were merged into Zhazidong prison and detention center.