Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Nancang-class auxiliary oiler replenishment ship is used by the People''s Liberation Army Navy to resupply ships at sea with food, munitions, fuel and spare parts. The only ship in this class in Chinese service, is Qinghaihu, ex Nancang. A similar ship with a Chinese hull classified by China as in the same class is in service with the Royal Thai Navy, as HTMS Similan. She was originally laid down for the Soviet Navy as a Komandarn Fedko class merchant tanker, but building work was halted due to insufficient funds, and was then purchased by the PLAN from the Russian Navy unfinished in 1993. The ship has a near sister ship operating with the Indian Navy.