Qingdao Dingzheng Import & Export Co.,Ltd is a joint-stock enterprise with four subsidiary factory for detergents,water treatment,



agriculture and petrochemical. It's one of the largest production base of chemicals in China,and has absolutely strength of



researching and developing the chemicals and its subsequent products with rich experience.We have approved the quanlity



mangagement system,environmental management system.We have totally right for Import & Export. The products are ...