According to Article 140 of China's Criminal Law, if selling fake and inferior masks constitutes a crime, it is suspected of selling fake and inferior products, and all localities can be sentenced to 15 years imprisonment or life imprisonment. Producers and sellers who adulterate their products, pass fake products off as genuine products, and pass unqualified products off as qualified products, if they are suspected of any of the following circumstances, should file a case for prosecution: 1, and the sales amount of fake and inferior products is more than 50,000 yuan; 2, fake and shoddy products have not been sold, the value of more than one hundred and fifty thousand yuan; 3. The sales amount of fake and shoddy products is less than 50,000 yuan, but the total value of unsold fake and shoddy products exceeds150,000 yuan after multiplying the sales amount by 3 times.