Gangyan Nake Testing Technology Co., Ltd. (stock code: 300797) is a secondary unit of the central enterprise China Gangyan Technology Group Co., Ltd., specializing in the research, development, and application of analytical instruments, equipment, and analytical testing technology. It is a high-tech innovative enterprise. At present, the main services or products provided by the company include analytical and testing instruments, third-party testing services, standard materials/samples, capability verification services, and other testing related products and extended services. The company's services and products are mainly applied in fields such as steel, metallurgy, non-ferrous metals, machinery, aerospace, nuclear power, high-speed rail, automobiles, new materials, environment, food, petrochemical, etc.