JIUQUAN, Oct. 30 (Xinhua) -- Chinese astronauts Zhang Lu, Wu Fei and Zhang Hongzhang will carry out the Shenzhou-21 crewed spaceflight mission, and Zhang Lu will be the commander, the China Manned Space Agency announced at a press conference on Thursday. The Shenzhou-21 crewed spaceship is scheduled to be launched at 11:44 p.m. Friday (Beijing Time) from the Jiuquan Satellite Launch Center in northwest China, said Zhang Jingbo, spokesperson of the agency.