From 1975 to 1994 China has successfully developed three models of recoverable satellites - the FSW-0, FSW-1 and FSW-2. Nine FSW-0 satellites have been successfully launched and recovered. Five FSW-1 satellites were all successfully launched and recovered with the exception of FSW-1-5 which was not successfully recovered. Two FSW-2 satellites were successfully launched and recovered. Launch weight of these satellites has increased from 1,970 kilograms of the FSW-O-1 to 2,760 kilograms of the FSW-2-2. Duration ranged from three days of the FSW-O-1 to 16 days of the FSW-2-1. The service missions of these satellites has constantly increased. The FSW-2 is a multiple applications satellite, with space science experiments and technology experiments.