Shenzhou 6 (神舟六号) was China's second human spaceflight, launched on October 12, 2005. The Shenzhou spacecraft carried Fei Junlong (费俊龙) and Nie Haisheng (聂海胜) for a five days orbit around the Earth. It was launched three days before the second anniversary of Shenzhou 5.
3 commemorative covers (launch, in orbit, recovery) here signed by Fei Junlong, Nie Haisheng and all other Chinese astronauts.