Celebrated every May 17th, International Day Against Homophobia, Transphobia, and Biphobia (IDAHOTB) commemorates the World Health Organization's 1990 decision to declassify homosexuality as a mental illness. This IDAHOTB, Tsai Center Senior Fellow Darius Longarino and Beijing LGBT Center program manager Cai Yao recount the early history of the depathologization movement in the Chinese edition of the Financial Times.