One of the original intention of the establishment of national product certification is to increase trade barriers and protect the competitiveness of our country's products, which is a non-tariff trade barrier; the second is to shut out unqualified products and improve the quality of imported products; the third is to meet the needs of the market as certified products will have better market competitiveness. In this process, in order to meet the needs of the market and ensure its own product quality, Acrel has successively obtained CE, MID, IEC, UL certification and will continue to apply for certification for all products.