ail transportation equipment industry is one of the high-end branches of precision metal manufacturing industry, with critical requirement on the technical standards and technology of product safety, grade of windproof and rainproof and cold proof, salt fog proof and ultraviolet-proof. the company has passed through the iris certification of international railway industry standard, able to manufacture products including seat frame for rail traffic vehicle, air conditioning ventilation duct and casing for traction system. we have been constant supplier for shanghai tanda, the largest domestic manufacturer of high-speed railway vehicle seats, providing almost all the mainstream models of domestic emu seat components. meanwhile, our traction box has been successfully applied in many urban rail transit lines, such as no.2 and no.4 suzhou light railway metro lines, and qingdao chengyang metro line, and so on. at present, market share of our high-speed railway seat system products is about 40%, and that of other products in this industry is low.