RoHS is a mandatory standard formulated by EU legislation. Its full name is the restriction of hazardous substances. The standard has been officially implemented since July 1, 2006. It is mainly used to standardize the material and process standards of electronic and electrical products, so as to make it more conducive to human health and environmental protection. The standard aims to eliminate lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers in motor and electronic products, and focuses on the content of lead not exceeding 0.1%.