Shenzhou XII astronauts conduct second spacewalk

Upon its completion, Tiangong will be manned regularly by groups of three astronauts in periods lasting several months. During handovers to the new three-member crew, the station will accommodate up to six astronauts.

During the three-day Shenzhou VII mission in September 2008, astronauts Liu and Zhai Zhigang carried out China's first spacewalk that lasted about 15 minutes.