 From December 1965 thru November 1975, a total of four ships were completed by Wuchang Shipyard, and all of them went into civilian service.The last ship built by Guangzhou Shipyard International in 1972 went into service with PLAN and had name Hai-Sheng (海声, meaning Oceanic Acoustic) 582.Type 988 is often deployed in conjunction with Type 595 ocean surveillance ship.