European standard level is high. Because Europe started early in industrial standardization, many international standards are based on European standards. European Standards (EN) are a series of standards formulated by the European Committee for Standardization (CEN) and its member countries, covering multiple fields such as product manufacturing, environmental protection, health and safety. These standards reflect the most common standards in the European market. Advanced production technology and environmental protection requirements are of great significance for protecting consumer interests and promoting international trade. Chinese National Standards (GB) are a series of national standards issued by the China National Standardization Administration Committee to regulate the domestic market and ensure Product quality and safety.