QINGDAO JINGGANG BUILDING CO.LTD, is a professional company engaged in the design research, development sale and service of steel structure building, transmission tower prefab house, Building construction materials and so on. We are located in Qingdao city with convenient transportation access. brhas enough test equipments.Strict quality control is performed in every procedure from material sourcing processing and testing to packing.We also support full refund in case of bad quality.,brWith export license>we export products to American Russia, Saudi Arabia Jamaica, Suriname Philippines, Japan Africa, India and so on.Our products gain wide praises at home and abroad.We will be your trustworthy supplier in China.