The Astronaut System is mainly responsible for selecting and training astronauts and conducting medical monitoring and providing supports to astronauts during trainings and flight tasks. An astronaut selection and training center has been set up in Beijing; such spacecraft-borne facilities as intra-vehicular activity spacesuit, medical monitoring and support equipment and personal life-saving appliance have been developed. The first group of 14 astronauts were selected out of the active pilots from the PLA Air Force at the beginning of 1998, who have successfully completed basic trainings and trainings on flight procedures and task simulation, joint rehearsals and so on. Having undergone strict trainings and tests, the first crew are all qualified for manned space flights. In May 2010, the 2nd crew, including 5 male astronauts and 2 female astronauts were selected. Till now, a total of 8 astronauts have undertaken manned space flight tasks, of whom are: Yang Liwei, Fei Junlong, Nie Haisheng, Zhai Zhigang, Liu Boming, Jing Haipeng, Liu Wang and Liu Yang.