With the widespread use of electronic and electrical equipment, the impact of electromagnetic interference on the environment is becoming increasingly severe, leading to the occurrence of electromagnetic interference and mutual incompatibility in various types of electrical appliances in practical applications. The electromagnetic interference generated by industrial, scientific, medical, information, motor vehicles, power equipment, and electrified railways and other electrical and electronic equipment not only disrupts the normal operation of public safety and communication equipment, but also has an impact and harm on the daily cultural life and even personal safety of residents. Therefore, industrialized countries and regions have incorporated the control of electromagnetic interference into the scope of national legal management and environmental protection. Especially since the 1990s, many countries have successively issued relevant laws, regulations, and standards, and implemented comprehensive management and supervision of the production and market circulation of electrical and electronic equipment, as well as the establishment of stations and enterprises engaged in electromagnetic radiation activities. In particular, electromagnetic compatibility certification systems have been widely implemented to ensure public safety and public interests. Introduction to BC Certification Abroad: In the field of EMC standards and certification, the European Community (now known as the European Union) issued Directive 89/336/EMC in 1989 (which was later modified twice, namely 92/31/EEC and 93/68/EEC), making EMC performance a condition for products with EMC requirements to enter the EU unified market. The main objects of this directive are: household sound and television receivers, industrial manufacturing equipment, mobile wireless devices, mobile radios and commercial wireless telephone equipment, medical and scientific equipment, information technology equipment, general electrical and household electronic equipment, light sources and fluorescent lamps, radio equipment for aviation and navigation, educational electronic equipment, telecommunications networks and instruments, etc. At the same time, it is also required that these devices and systems have appropriate immunity. The scope of application of this directive includes: products sold or used within the unified market of the European Union, as well as new products produced within the EU or new or second-hand products imported from third countries