Yantai Guohua Heavy Industry Co., Ltd. was established in 1992 and specializes in the production of steel grating products. Steel grating welding machines were introduced from the United States in the early days and used for production. In 2005, in order to meet the needs of market expansion and business growth, Japanese high-tech welding machines were introduced.

The company has manufacturing processes such as steel gratings, stepping plates, steel ladders, railings, structural steel and stainless steel. The products are used in commercial and civil fields such as production platforms, floors, corridors, stairs, trench bridges, fences, trench covers, manhole covers, ceiling panels, ventilation and light-transmitting facilities. The light weight of the product not only saves material costs and galvanizing costs, but also significantly reduces the pressure, which greatly reduces the cost of steel grating support structure.

The company's products comply with the Chinese YB/T4001.1-2007 standards, and can also be produced in accordance with the US ANSI/NAAMM (MBG531-88), UK BS4592-1987, and Australian AS1657-1992 standards. The company passed the international certification of the Norwegian Classification Society (DNV) ISO9000 quality assurance system in 1999; in 2015, the company passed the EU CE certification (CE) to meet the needs of the international market. In 1996, 2002 and 2005, it was named a high-tech enterprise by the Shandong Provincial Science and Technology Commission.