Dongying Changsheng Metal Products Co., Ltd. is a manufacturer and trading company based in Dongying, Shandong, China, established in 2010. With 11 to 50 employees, the company specializes in precision metal products, including casting, stamping, and machining parts. They utilize materials such as stainless steel, carbon steel, and alloy materials. Their product portfolio includes solar fastening systems, glass holders, glass clamps, hanger bolts, trailer balls, hooks, roof hooks, and various general hardware. The company operates a factory and is located near the Yellow River estuary, approximately 300 kilometers south of Qingdao.