After August 13, Hongkou, Shanghai was bombed indiscriminately by the Japanese army and was devastated. 1938 It was found that a two-story villa at No.7 East Sports Club Road, Hongkou District, which was occupied by the Japanese, had been renovated, and someone had furnished the building and was going to live here. It turned out that the man was Kenji Fujiwara, a Japanese war criminal. He regarded it as a private house and renamed it "Chongguang Hall". The notorious Secret Service "Special Committee on China" and "dohihara Agency" are located here. The general location of No.7 East Sports Club Road is relatively easy to determine, just on a small piece of land between the north of hongkou football stadium and Shanghai International Studies University.
On behalf of Gao Chongwu, Mei Siping, Takeo Imai and Yoshio Ito, Wang Jingwei held a preparatory meeting for Wang Puppet to take refuge in Japan, which was later called "Sogo Hall Talks", and the agreement reached was "Sogo Hall Secret Agreement".