As one of the earliest domestic companies to engage in steel structure design and manufacturing, HHI is a first-class solution provider domestically for steel structure engineering system, which boasts several core products such as large-span spatial steel structures, wind turbine towers, and steel structures of industrial heavy equipment. The business scope covers design, technology R&D, engineering general contracting for steel structure engineering system, involving electric power, chemical industry, metallurgy, mining, and civil construction at home and abroad. It has strong market competitiveness in engineering of bulk material storage closed system, industrial building steel structure, steel structure indirect cooling tower system, high-rise and large-span civil buildings, etc.