The CY-1 (Chang Ying 长樱, Long Tassel, often erronesously referred as Chian Yu, 劍魚, 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. 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. The CY-1 is also known to have been tested on the Type 039 submarine.