Qingdao C. O. S. Trading Co., Ltd. Produce tyre & tube, and supply steel plate. QINGDAO C. O. S. TRADING Co., Ltd. is a corporation that specilizes in the sales such as tire, machinery and machinery fittings, steel plate and non-ferrous metal, wheel, rubber and rubber product, ply wood, fashing and furniture. Our main business include international trade, logistic service, domestice wholesale and retail, techinical service. We provide high-quality products and technical support for clients in mainland world alike. Beautiful life need intellectual management, C. O. S. Worker will devote our brightness to our customer and cooperator!