In addition to the strict implementation of the certified ISO9001 quality management system and the related quality standard requirements, self-inspections, professional inspections and third-party inspections are conducted in the Company to make sure compliance to the quality standard for all the products before dispatching from workshops. Based on the management of job skills at key working positions, 4M management for change approval process and the application of the national standard production line management system, we record the manufacturing data and product status at each processing step in a real-time mode, realizing the traceability of product quality, which significantly contributes to the excellent quality of “Sinoma-Liyang” products.