Cai Pei (Chinese: 蔡培; pinyin: Cài Péi; Wade–Giles: Ts'ai P'ei; Hepburn: Sai Bai; 1884–1960) was a diplomat and politician in the pre-World War II Republic of China. He held a number of important posts during the collaborationist Reorganized National Government of China, and successively held the positions of Mayor of Nanjing Special City and Ambassador to Japan. His courtesy name was Ziping (子平).
Source: “Cai Pei”, English Wikipedia (CC BY-SA 4.0), excerpt