He rapidly rose within the Kuomintang hierarchy with the support of the so-called
"Central Club Clique" led by
Chen Lifu and by 1934 chaired the Research and Statistics Department, which was a cover for the Kuomintang
secret police. However, when forced out of power due to numerous corruption scandals in a reorganization of the Kuomintang in 1938, he defected to the Japanese side along with
Li Shiqun. Under the direction of Japanese spymaster
Kenji Doihara, the two worked to create an intelligence and secret police security service, which was founded in April 1939 and whose headquarters was located at 76 Jessfield Road in Shanghai. This address contained holding cells, where suspected Communists and Kuomintang prisoners could be interrogated and executed. Under the collaborationist
Reorganized National Government of China led by
Wang Jingwei Ding served in the Central Political Committee, the Military Committee, and the
Executive Yuan of the Reorganized National Government. He later held the cabinet-level posts as Minister of Society and Minister of Transport in the Reorganized National Government and served at one point as governor of
Zhejiang Province. On December 21, 1939 he escaped an assassination attempt involving
Zheng Pingru. ==Arrest and execution==