Sean Sih-Cheng Du (he/him) is the secretary-general of the Taiwan Tongzhi (LGBTQ+) Hotline Association. He joined Hotline as a volunteer in 2002 and has since been actively involved in the work on LGBTI+ and PLWHIV’s rights. He became Hotline’s director of policy advocacy in 2011 and the secretary-general in 2021. His work includes social education, workplace equality, gay men’s sexual health, and international affairs. He was a crucial member of the Marriage Equality Coalition Taiwan and a board member of the Persons with HIV/AIDS Rights Advocacy Association of Taiwan. He is currently the East Asian Representative of the ILGA Asia Executive Board, a member of the Gender Equality Committee, Executive Yuan, a member of the Taipei City Committee of Gender Equality, and a board member of the Taiwan Equality Campaign. He has a master’s degree in Sociology from National Taiwan University.