Because Xiangshan Villa is a detention center, Chiang Kai-shek will not live there.

Xiangshan Villa, also known as Bai Mansion, was originally a villa of Sichuan warlords in the suburb of Shapingba, Chongqing. In the 1930s, he built it to raise concubines. 1938, bought by the Military Bureau for 30 taels of gold. 1939, the Scout changed it into a detention center directly under the headquarters of the Scout Bureau, which was called the Scout Chongqing Detention Center, and was mainly used to hold political prisoners who were considered by the Kuomintang government to be of higher rank. After the establishment of 1943 SACO, the prisoners in Baigongguan were transferred to the dregs cave. Bai Mansion was renamed the Third Guest House of Sino-American Cooperation College for American personnel to live in.

After the end of World War II, the Sino-American Cooperation Institute was abolished, American personnel returned to China, and Bai Mansion was restored as a detention center. Moreover, the military government merged the military concentration camp, Xifeng prison, Wanglongmen detention center and Zhazidong detention center in the southwest, and established the Baigongguan detention center, which was later called the National Defense Secrecy Bureau detention center.

On the wall of the courtyard of Bai Mansion, there are slogans such as "thinking about loyalty and righteousness, retreating from thinking about making up for it" and "being right but not its benefits, knowing its way but not its merits". The underground storage room was turned into a dungeon, the original bomb shelter into a torture room, and the house into a cell. Bai Mansion once held Huang Xiansheng, Tongji University President Zhou Junshi, Liao Chengzhi, party member, Xu Linxia and their youngest son "Little Radish Head", and at most held more than 200 political prisoners.