Which one is bigger, Zhazidong or White House?

Zhazidong was originally a coal cave in the outskirts of Chongqing. It was a small coal kiln opened by Cheng Erchang in 1920. It was named because there was a lot of slag but little coal. Zhazi Cave is surrounded by mountains on three sides and a ditch on one side, so its location is relatively hidden. After the Bai Gongguan was converted into the Third Guesthouse of the Sino-US Cooperation Institute in 1943, political prisoners held there had to be relocated. Shen Zui, the director of the General Affairs Department of the Military Command, personally drove a jeep to inspect everything, and finally selected Zhazidong as the new location for the prisoners in the former Baigongguan Detention Center. After the Sino-US Cooperation Institute was abolished, the prisoners were moved back at the end of 1946 (some say April 2, 1947). Zhazidong Prison was merged into Baigongguan Detention Center, but it was temporarily abandoned. In December 1947, prisoners were again detained in Zhazidong, and it was called the Second Detention Center of Chongqing Xingyuan No. 2 Branch. The detained persons are mainly those from education and journalism arrested in the "June 1st Arrests" in 1947, persons arrested in the underground armed case of the "Little Chinese Revolution", persons captured and arrested in the three armed uprisings in eastern Sichuan, "Advance" People arrested in the "Newspaper" incident, members of the Sichuan East and Sichuan Kang branch of the Kuomintang Revolutionary Committee, etc., at most, more than 300 people were imprisoned. Jiang Zhuyun, Xu Jianye, Yu Zusheng, etc. were once detained here.

Zhazidong Detention Center is divided into inner and outer courtyards. The inner courtyard has a ventilation dam, 16 male cells and 2 female cells. On the wall of the inner courtyard are written slogans such as "Youth is gone and never comes back. Think carefully and recognize this here and now, and don't be obsessed with it.", "The maze is endless, and you will find a safe place when you turn around." The outer courtyard is the office and torture chamber. On the wall of the outer courtyard are slogans such as "What the superior cannot see, think of, hear, and cannot do, we must see, think, hear, and do for the superior."

The Bai Mansion was originally the villa of Sichuan warlord Bai Ju in the suburbs of Shapingba, Chongqing. In the 1930s, he built it to raise his concubine. In 1938, the Military Command Bureau bought it for 30 taels of gold. In 1939, the military reunification changed it into a detention center directly under the headquarters of the military reunification bureau, called the military reunification Chongqing Detention Center. It mainly detained political prisoners considered to be higher-level by the Kuomintang government. After the establishment of the Sino-American Cooperation Institute in 1943, the prisoners in Bai Gongguan were moved to Zhazidong. The Bai Mansion was renamed the Third Guest House of the China-US Cooperation Institute to accommodate American personnel. After the end of World War II, the Sino-US Cooperation Center was dismantled and American personnel returned to China, and Bai Gongguan was restored as a detention center. In addition, the military commander merged the military commander concentration camp, Xifeng Prison, Wanglongmen Detention Center, and Zhazidong Detention Center in the southwest to establish the Baigongguan Detention Center, which was later called the National Defense Security Bureau Detention Center.

On the wall in the courtyard of Bai Gongguan are written slogans such as "Advance to think and improve loyalty, withdraw to think and make up for mistakes", "Righten the right thing without counting the benefits, understand the way without counting the merits" and other slogans. The original underground storage room was converted into a dungeon, the original air raid shelter was converted into a torture room, and the housing was converted into cells. Bai Gongguan once imprisoned Huang Xiansheng, Tongji University President Zhou Junshi, Liao Chengzhi, Communist Party member Song Qiyun, Xu Linxia and his wife, and their youngest son "Little Luobotou". The maximum number of political prisoners imprisoned was more than 200.