The Company's quality management stipulates the requirements of the Company's quality management system according to ISO9001:2015, IATF 16949:2016, EN9100:2018, EN15085, ISO3834 and ISO/TS22163:2017 standards. Among them, EN9100 is the international aviation and aerospace quality management system standard, which is one of the prerequisites for the market access of aviation and aerospace suppliers. IATF 16949 is a special requirement for the organization and implementation of ISO9001 for production parts and related service parts in the automobile industry. It is a technical specification for the international automobile industry. It is applicable to automobile manufacturers and their direct spare parts manufacturers. It is also an admission certification for suppliers in the automobile industry. ISO/TS22163 is the management system standard for the railway industry and has been recognized by the four largest railway system manufacturers in the world. EN15085 is a quality management system for rail transit welded parts, including the whole process quality certification of contract, design, process, production, inspection and subcontracting. The Company also actively participates in and advocates environmental protection and manufacturing in low-carbon life in accordance with the requirements of ISO14001 and ISO45001, and strives to become an energy-saving manufacturing enterprise.