SHANGHAI TONGYADA IMPORT AND EXPORT CO.,LIMITED Is a collection of production, processing, agency, sales and export is a body comprehensive enterprise, its business scope involves: electric bicycle spare parts, hardware, steel, building materials, metal materials, manual pump, high pressure pump, bicycle pump, maksidom, bicycle parts, bearings and other mechanical equipment and electronic products sales and other fields, the company is receiving ;professional, honest, trustworthy; business ideas, committed to hardware mechanical and electrical, bicycles and electric car accessories, etc, to provide you with the first class products and services.