The CE mark is a safety conformity mark and is the main requirement that forms the core of the European directive. The "CE" mark is a safety certification mark that is regarded as a passport for manufacturers to open and enter the European market. CE stands for European Unity. In the EU market, the "CE" mark is a compulsory certification mark. Whether it is a product produced by an enterprise within the EU or a product produced in other countries, if it wants to circulate freely in the EU market, it must be affixed with the "CE" mark to show that the product complies with the basic requirements of the EU's "New Methods for Technical Coordination and Standardization" directive. This is a mandatory requirement imposed by EU law on products.