On November 28, 2019, we welcomed the three-system (three-system refers to quality, environment, occupational health and safety) audit. The three teachers reviewed the monitoring process of products and services. Product and service deadlines and their delivery processes; Customer-related processes; Control of product monitoring process, environmental factors and hazard sources; Operation control of production process, environmental factors and hazard sources; Procurement management and operation control; Management process; We have audited all links of the company from the aspects of supporting processes, environmental factors and hazard sources, and required us to continuously improve the problems found in the audit process. At the last meeting, the general manager analyzed the problems in the audit and required all departments to make corresponding rectification according to the system documents.