Yongsheng Chemical Industrial Co., Ltd. was established in 1999. The total investment is 8 million RMB. We manage the professional production of super-sulphate and dozens of other kinds of chemical reagent products. With strong technical ability and advanced production facilities, we carry out the overall scientific administrative system of ISO9001. The products of our company are of stable quality, guaranteed with scientifically thorough and safe service standards. The output of our products increases year by year to meet customers' greater demands. Our annual yield of ammonium...