Wang Jingwei
Chu was in Shanghai during the Battle of Shanghai in 1937, remaining in that city during the Japanese takeover. However, when his brother-in-law Wang Jingwei broke ranks with the Kuomintang and established the collaborationist Wang Jingwei Government, Chu accepted the post of Vice President of the Executive Yuan and Foreign Minister in 1940. There was a byword describing the main members of Wang Jingwei's government. “Chen Gongbo's mouth, Zhou Fohai's pen and Chu Minyi's legs.”