A number of articles have circulated widely on overseas Chinese websites questioning the authenticity of the space walk the Chinese astronauts on the Shen Qi spaceship conducted. The articles listed a number of doubts based on official state medias published videos and concluded that the spacewalk was not the live footage of the spacewalk, but rather recordings from the rehearsal at the Astronaut Research and Training Center.
Source: The Epoch Times, October 3, 2008
http://www.epochtimes.com/gb/8/10/3/n2284091.htm