US Congressional leader and veteran China critic Nancy Pelosi is due in Hong Kong next week after a visit to the mainland just days ahead of the June 4 anniversary. Mrs Pelosi's trip is still being finalised and has yet to be announced by her Washington office, but sources said she was expected to meet a wide range of Hong Kong politicians, and American businessmen. A formal meeting with Chief Executive Donald Tsang Yam-kuen is also expected. 'She's got a lot to catch up on ... it is her first trip for some time and it will give her the chance to take the temperature of the political environment of the city,' a Washington source close to the trip said. 'It is also an important message that Hong Kong has not been forgotten in the US Congress.' While her visit comes just ahead of the 20th anniversary of the Tiananmen crackdown, her staff said her rising interest in sustainable energy, rather than June 4, would dictate her priorities. Mrs Pelosi, the Speaker of the US House of Representatives, is expected to meet her old friend, Democratic Party founder Martin Lee Chu-ming, in Hong Kong but is also likely to meet younger, emerging politicians as well. Mrs Pelosi has long been at the core of the US Democratic Party's anti-Beijing wing. She voted against her own party's push to normalise trade relations in 2000, a move that paved the way for China's entry to the World Trade Organisation. She has been an outspoken critic of the human rights situation on the mainland, particularly over Tibet and the Tiananmen crackdown. Her views in part reflect the fact that her San Francisco congressional district is home to one of the oldest Chinatowns in the United States. She staged a high-profile visit to Hong Kong and Beijing in 1993 to support the cause of dissident Han Dongfang , who at the time had just been expelled from the mainland to Hong Kong. Mr Han still lives in Hong Kong. Mrs Pelosi is to visit Beijing and Shanghai before arriving in Hong Kong late next week. Since being appointed to the Speaker's chair after the Democratic electoral landslide in 2006, Mrs Pelosi and other US Democratic leaders have been the target of an intensified campaign by Washington lobbyists hired by Beijing.