EU RoHS is a directive that specifically controls mful substances in electrical and electronic products, and the impact of EU RoHS is huge, and many countries or regions have issued similar regulations to control the entry of electronic and electrical products into their own or regional markets. In addition, WEEE, REACH, polycyclic aromatic hydrocarbons, halogens, PoHS, POP, etc. have a greater impact on the business community of electronic and electrical products.