Shenzhou 4 (神舟四号), launched on Dec 29, 2002, was the fourth unmanned launch of the
Shenzhou spacecraft. This spaceflight cover was issued to commemorate the successful launch, authographed by the 6 Chinese astronauts selected for the human spaceflight
Shenzhou 6.
Signatures:
Liu Boming(刘伯明),
Zhai Zhigang(翟志剛),
Nie Haisheng(聂海胜),
Jing Haipeng(景海鵬),
Wu Jie(吴杰),
Fei Junlong(费俊龙).