Laizhou Huayin Testing Instrument Co., Ltd. is a company that develops and produces hardness meter for metal and non-metallic materials. It has started to specialize in the production and manufacturing of hardness meters in 1961. The annual output of nine series of more than 50 different varieties and specifications is more than 10,000 hardness meters, and various standard hardness blocks exceed 100,000. The products are sold well across the country and are exported to more than 70 countries and regions including the United States, Europe, Asia and Africa. In addition, the company also produces universal, torsion, impact testing machines and other products.

The company was established in February 1948. It was originally named "Shandong Ye County Materials Testing Machine Factory" and "Laizhou Testing Machine General Factory". It was renamed "Laizhou Huayin Testing Instrument Co., Ltd." in 1990. It is a national hardness test base in the 1960s. The first domestic hardness tester development of Rockwell, Breakfast, Vickers, Shaw Brothers, Rich, Shaw, Shaw, Shaw, Shaw, and Shaw were all from the company. The company's technical R&D center has two research institutes: machinery and electronics, and has jointly established the "Beihang Huayin Experimental Technology R&D Center" with Beijing University of Aeronautics and Astronautics, and has established more than ten scientific research institutions including a military research institute in Xi'an and a Chinese Academy of Metrics Sciences. Stable cooperative relationships such as project development and standard formulation.

Since the 1960s, the enterprise hardness benchmark transmission unit authorized by the General Administration of Quality Supervision, Inspection and Quarantine. In addition to producing conventional hardness working machines, the company also has the ability to develop reference machines and intelligent online automatic detection of large-scale hardness machines. There are more than 50 hardness meter varieties in B, Luo, Wei, Xiao, Li, Shaw, Standard, Online, Multi-use nine series, large, medium and small, complete categories, with annual production capacity of more than 10,000 hardness meters, hardness blocks With more than 100,000 yuan, it is a professional hardness meter research and production company with large production scale, complete varieties and excellent quality in the world. There are currently five major subsidiaries: Huayin hardness meter, Huayin Metallographic Equipment, Huayin Jiehong Machinery, Shanghai Yecai Technology, and Huayin Engineering Technology.

The company's product marketing consists of three parts: International Trade Office, Domestic Sales Office, and Hardness Tester Service Center. There are seven sales subsidiaries, eighteen branches, and more than 130 first-level and second-level agents nationwide, with sales network covering provinces, cities and autonomous regions except Tibet and Xinjiang. The products are sold to more than 60 countries and regions including Europe, the United States, Asia, etc., and the company has established agency relationships with more than 120 foreign distributors.