Weifang Dongxing Chitosan Factory was established in 2003 , and located in weifang city Shandong province .Through the hard work for these years that our company has become one of the strongest manufacturers in chitosan line .we specialize in producing chitin , chitosan , chitosan oligosaccharide , water soluble chitosan, and high desity chitosan and so on . all the products be exported to Europe and America , Southeast of Asia , Africa , and the Middle East international markets . For these ...