According to the EU market surveillance regulations that will be implemented on July 16, 2021, if products with the CE marking want to enter the EU market for sale, the CE-marked products need to have an EU responsible person as a point of contact for compliance. If a product outside the EU lacks information from an EU authorized representative and enters the market for sale hastily, it will face a strict audit by the EU market supervision authorities. What is the role of the EU authorized representative? Who should sign the DoC to be valid? How to choose a qualified EU authorized representative?