Qingdao Yunzhou Biochemistry Co., Ltd. was founded in 2002 in Jimo, Qingdao, China by its owner and also managing director Mr. Wang Kaiyu., and now we are a leading manufacturer dedicated in Chitosan and supplying to both domestic and overseas markets like the USA, Asia countries as well as European countries. Yunzhou has grown from a chemical factory into a very professional enterprise with its trade department in central area of Qingdao. Relying on the technology of institute of oceanology, ...