China State Shipbuilding Corporation
Two further ships of the class have been built. The first was "Yuanwang 3", which was commissioned on 20 October 1995. The "Yuanwang 4" tracking ship was constructed by China State Shipbuilding Corporation and delivered to the China Satellite Launch and Tracking Control General on 18 July 1999. It had been converted from the previously used "Xiang Yang Hong 10" scientific survey ship.