Shengstone International Trade Co.,Ltd is located in the beautiful international port ? Economic Development Zone in Qingdao City, Shandong Province which boasts convenient transportation and abundant resources. The factory of company bears an advanced ability in research and invention, wonderful manufacturing technology, specialized testing equipments and professional management team (whose members share a working experience exceeding 15 years in the tire industry on average; among them, 2 senior economists, 5 senior engineers, 16 intermediate engineers, 3 doctors and 5 masters). The company develops an annual production capacity of 12000000 sets of semi - steel zero-angle tire in whole series since its pioneering days.