First: Go to National Medical Products Administration to inquire.

Usually, the product registration number will be marked on the outer packaging of more formal medical surgical masks. The numbering rule is usually: X- machine registration (X is the abbreviation of each province, such as Hubei, Zhejiang and Guangdong)+registration year +264 (indicating that it belongs to the second-class medical device 64 classification)+number. It can be identified through the website of the State Administration of Medical Products.

Second: inquire about the implementation standards and production standards of masks.

Real disposable surgical masks always have three filter layers. Please check whether there is "YY 0469-20 1 1" on the mask package before buying. If there is such a letter (number) code, it proves that the mask conforms to YY 0469-20 1 1 Medical Surgical Mask.

Third: appearance comparison.

You can judge the truth by checking whether the face side of the mask is shiny, broken hair and stains. The text printing of real masks generally adopts laser etching, and it is 45-degree twill. Due to the limitation of cost and technology, fakes are generally printed with ink, which can't present twill.