The CY-1 (Chang Ying 长缨, Long Tassel, often erroneously referred as Chian Yu, 剑鱼, or Swordfish) is a Chinese anti-submarine rocket carried on a variety of surface platforms, including the Luda class missile destroyers and Jiangwei class missile frigates. A series of CY ASW missiles have been developed based on CY-1. To date only a small number of CY-1 is known to have been produced and deployed on trial basis, despite the fact that it had first appeared on the defense exhibitions held in China in the late 1980s.