The company strictly follows the established control process, forms detailed quality documents according to the product manufacturing process, and regularly inspects the measuring tools and standard parts as required. The Production Department is mainly responsible for the production of all products of the company in strict accordance with the production process and bearing quality standards; The Quality Inspection Department is mainly responsible for inspecting all products of the company in strict accordance with the standards. The raw materials of the company's products are the steel of Daye and Shougang in Hubei Province. In the production process, the process flow card is used for tracking, and the products are numbered. Each part and each set of finished products are numbered. From the source of the products, from the entry of forgings to the delivery of finished products, each process is tracked and recorded. Each set of bearings has a separate quality file, and the products are traceable. Each process of all parts shall be subject to full inspection, and detailed inspection records shall be made, including all inspection records between processes of parts, final inspection records of parts * * *, all inspections before entering the assembly workshop, all inspections before packaging and other multiple inspection processes. The perfect quality assurance system and advanced testing means effectively ensure the stability and reliability of product quality, and also improve the market competitiveness of products.