Yanxi Class (Weapons Trials Support Ship)
The Yanxi weapon trials ship is a poorly characterized auxiliary ship of the People's Liberation Army Navy (PLAN). The class is named after the first [and only] unit commissioned, with the Chinese nomenclature unknown. In contrast to the standard naming conventions of Chinese military where the ship is designated by a combination of two Chinese characters followed by three-digit number, the Yanxi class is designated by a single Chinese character, Xun, short for Xun-Lian, meaning training in Chinese. Seemingly this ship is also used for training ships. The pennant numbers seem to have changed due to the change of Chinese naval ships naming convention. The Yanxi carried no systems other than anti-aircraft guns and radars, but it did support Soviet Styx surface-to-surface missile (SSM) launch and recovery tests. In addition to weapon trials ship, the Yanxi was also used as a training ship, and could carry thirty instructors with two hundred cadets when used in that role. With more advanced and larger weapon trials ships and training ships entering Chinese service to replace its original weapon trials and training role, Yanxi was mainly carrying out drone launch and recovery trials to support the development of naval UAVs.