20th anniversary of Tiananmen Square: how events unfolded

22 April 1989: 200,000 pro-democracy student protesters face off with police outside the Great Hall of the People Photograph: Catherine Henriette/AFP/Getty Images

1 May 1989: Wang Dan, a leading dissident and member of the Beida students delegation, addresses foreign correspondents Photograph: Catherine Henriette/AFP/Getty Images

Students build a replica of the Statue of Liberty Photograph: Sipa Press / Rex Features

2 June 1989: Thousands of people gather around a 10-metre replica of the Statue of Liberty Photograph: Catherine Henriette/AFP/Getty Images

3 June 1989: A student calls on soldiers to go home as crowds flood into central Beijing Photograph: Catherine Henriette/AFP/Getty Images

3 June 1989: Buses burn in the street on the day the military crackdown begins in earnest Photograph: Jacques Langevin/Corbis

3 June 1989: Protesters run for cover as tanks roll into Tiananmen Square Photograph: Jacques Langevin/Sygma/Corbis

3 June 1989: Protesters attempt to save the wounded Photograph: Patrick Durand/Corbis

4 June 1989: Dead civilians among mangled bicycles Photograph: AP

5 June 1989: A man blocks a line of tanks heading east on Beijing's Changan Boulevard Photograph: Jeff Widener/AP

5 June 1989: Two people on a bicycle take cover in an underpass as tanks roll overhead in eastern Beijing Photograph: Liu Heung Shing/AP

6 June 1989: Tanks remain in Tiananmen Square days after the military crushed protests Photograph: Jacques Langevin/Corbis