SHANGHAI GUAN SHENG YUAN INTERNATIONAL CO. LTD. - China

shanghai greatsun industry co., ltd. one of the leading supplier of maleic anhydride,fumaric acid and gum rosin in china.we have productions base in shanxi province and yunnan province.shanxi province is rich in coal resources,coal used to produce benzene as raw materials for maleic anhydride. yunan province is rich in forest resources,it is convenient to get raw materials for gum rosin. and our manufactory have ISO9002 certificate,our output of maleic anhydride is about 1000MT/month,the fumaric acid is about 500MT/month,the gum rosin is about 800MT/month.