J渣滓洞, located in the suburbs of chongqing city under the songle mountain, five Ling Guan area, it three sides around the mountain, a face ditch, the terrain is hidden. 1938, this place was the nationalist secret service organs into a secret prison, specially used to detain and persecute the revolutionaries, many can be sung, heroic and tragic deeds happened in this. Jagged Cave is divided into two courtyards, the inner courtyard has a floor and a bottom of the men's prison 16, and two cottages for the women's prison, the outer courtyard for the secret service office and interrogation room. On the eve of liberation, the Kuomintang agents set fire to the dregs of the cave, only escaped 15 imprisoned revolutionaries, the rest were unfortunately sacrificed.

Jardine Cave was originally a small coal kiln for manual coal mining, and was named after the small amount of coal and the large amount of slag. It was surrounded by mountains on three sides and a ditch on the other side, and the terrain was hidden. 1943, the White House was changed into the third guest house of the Sino-US Cooperation Institute, and the detained "political prisoners" were moved to this place, and in April 1947, they were moved back. In December 1947, closed for more than half a year, Jhaju Cave as the Chongqing Regiment two second detention center re-imprisoned people. The source of the detainees were mainly the "key criminals" arrested in 1947 "six, one", the "Progressive Newspaper" case and the "Small Democratic Revolution" case of the arrested persons. The maximum number of people arrested after the failure of the Upper and Lower Chuan Dong Armed Uprising was more than 300. Martyrs such as Jiang Zhuyun, Xu Jianye and Yu Zusheng were detained here. The Jagged Cave Detention Center is divided into two courtyards, the inner courtyard has a wind release dam, a floor and a bottom of the men's cell sixteen, women's cell two. In order to spiritually break the fighting spirit of the revolutionaries, the secret agents deliberately wrote on the wall of the inner courtyard of the Jagre Cave, "Youth is gone forever, think carefully, recognize this time and place, do not be obsessed." and "The maze is boundless." They wrote on the wall of the inner courtyard of the dregs cave the slogans "Youth is gone forever, think carefully, recognize this time and this place, do not be obsessed.", "There are no boundaries, turn back to the shore", and "Tranquility and patience, do not complain, do not worry. The outer courtyard was the secret service office and torture room. On the wall of the outer courtyard, there is a slogan of the secret service, "What you can't see, can't think, can't hear and can't do, we want to see, think, hear and do it for you".

The prison was jointly run by the Kuomintang and the U.S. imperialist secret services during the Anti-Japanese War, and specialized in the imprisonment of ****anufacturing party members and progressive youth. It is located at the foot of Gele Mountain in Chongqing, China. Originally a coal kiln for manual mining, it was named for the abundance of slag. It is 2.5 kilometers away from Baigongguan, which was turned into a prison by the Kuomintang in 1939, and was transformed into the second prison by the Sino-American Cooperation Institute in 1943, which is directly under the Southwest Governor's Office. Jagged Cave Prison faces mountains on three sides, with a deep ditch in front of it. The prison was divided into two courtyards, the outer courtyard was the prison office and torture room, the inner courtyard had 16 male cells and 2 female cells, imprisoning more than 700 people at most. ***In 1949, the KMT massacred more than 200 people in a group massacre, and only 15 of them escaped.

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During the Sino-Japanese War, the Nationalist Party and the U.S. imperialist secret service jointly organized a prison specializing in the incarceration of ****-production party members and progressive youth. It is located at the foot of Gele Mountain in Chongqing, China. Jagudong was originally a coal cave, and its founder, Cheng Erchang, was born in 1886 in Zhangjiachang, Maguikou, and at the age of 23, Cheng sold his property and opened three charcoal factories to mine bituminous coal in the area from today's Maguikou to the Tomb of the Martyrs, in the area of Tudang, Jagudong, and Qingcaopo. The Jagudong Coal Kiln was opened in 1920. It was originally a coal kiln for manual mining, and got its name because of the abundance of dregs. It is 2.5 kilometers away from Baigongguan, which was turned into a prison by the Kuomintang in 1939, and then transformed into the second prison by the Sino-American Cooperation Institute in 1943, which is directly under the Southwest Governor's Office. Jagged Cave Prison faces mountains on three sides, with a deep ditch in front of it. The prison is divided into two courtyards, the inner and outer, and a basement, which is used for storage. The outer courtyard was the prison office and torture room, and the inner courtyard had 16 male cells and 2 female cells, imprisoning more than 700 people at the most. *** Party members Luo Shiwen, Jiang Zhuyun (Sister Jiang), Li Qinglin, etc. have been imprisoned in this. 1949, the tragic case of 127, the Kuomintang on the collective massacre of more than 200 people, only 35 people out of harm's way.