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Hengyang Valin Steel Tube Co. Ltd. (hereinafter referred to as HYST) is a subsidiary of Hunan Valin Iron & Steel Group Co., Ltd. founded in 1958, is one of the seamless steel tube & pipe enterprises with the most entire rolling mills, advanced equipment and complete product specifications whose production scale has been tanked the globe fifth by “Metal Bulletin” US. Its export volume has continuously kept the leading position in China seamless tube & pipe industry for dozen years. It is a national high and new-tech enterprise which is the first to pass the State Intellectual Property Management System Certification and one of the first among 45 steel standardizes enterprises audited by “Steel Industry Standard Condition” of MIIT. It has 5400 employees with total assets of 13.4 billion Yuan.