An American activist and social campaigner born in Hong Kong. Founder and President of the Campaign for Hong Kong, an organization that lobbies politicians to introduce laws supporting democratisation and human rights in Hong Kong. He was one of the initiators of a successful campaign that led the U.S. Congress to pass legislation opposing human rights and democracy violations in Hong Kong – the Human Rights and Democracy Act, the Hong Kong Autonomy Act (2019). He has been sanctioned by the Ministry of Foreign Affairs of the People's Republic of China and is subject to an arrest warrant issued by the Hong Kong authorities (2020).