Shanghai ChangZeng Metal Co., Ltd. attaches great importance to the raw materials of structural steel channel-standard i beam. Apart from choosing low-cost materials, we take the properties of material into consideration. All the raw materials sourced by our professionals are of the strongest properties. They are sampled and examined to ensure they comply with our high standards.. To establish ChangZeng brand and maintain its consistency, we first focused on satisfying customers' targeted needs through significant research and development. In recent years, for example, we have modified our product mix and enlarged our marketing channels in response to the needs of customers. We make efforts to enhance our image when going global.. Our dedicated and knowledgeable staff have extensive experience and expertise. To meet the quality standards and provide high quality services at ChangZeng Metal, our employees participate in international cooperation, internal refresher courses, and a wide variety of external courses in the areas of technology and communication skills..