Qingdao Yunzhou Biochemistry Co., LTD has been dedicated in the manufacturing of chitosan, chitosan oligosaccharide, glucosamine hydrochloride, chondroitin sulfate and fish collagen. As No.1 brand chiotsan Manufacturer here in China, we have been exporting to USA and many European countries since 2002. We are also chitin and chitosan supplier to many domestic chitosan factories and trade companies. Our factory has ISO9001:2008 certificate and SGS certificate. And we will save no efforts to supply our customers with high quality products and most competitive prices.