1, it is not illegal to sell diet pills, as the case may be. It is not illegal to sell diet pills produced by regular manufacturers, but if they are not produced by regular manufacturers or are counterfeit and shoddy drugs, they will be sentenced, which involves two kinds of charges. Whoever produces or sells counterfeit drugs shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention and shall also be fined; Whoever causes serious harm to human health or has other serious circumstances shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years.

2. Legal basis: Article 141st of the Criminal Law of People's Republic of China (PRC).

Crime of producing, selling and providing counterfeit drugs. Whoever produces or sells counterfeit drugs shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention and shall also be fined; Whoever causes serious harm to human health or has other serious circumstances shall be sentenced to fixed-term imprisonment of not less than three years but not more than ten years and fined; Whoever causes death or has other particularly serious circumstances shall be sentenced to fixed-term imprisonment of not less than 10 years, life imprisonment or death, and shall also be fined or confiscated. Drug addicts who knowingly provide counterfeit drugs to others for use shall be punished in accordance with the provisions of the preceding paragraph.

Second, is it illegal to sell masks privately?

It is illegal to sell masks in private. Masks belong to medical devices and can only be operated with relevant business qualifications. Without business qualifications, it is illegal to operate. If the circumstances are serious, he shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also be fined not less than one time but not more than five times the illegal income. Whoever, in violation of state regulations according to law, commits one of the following illegal business operations and disrupts market order, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than five years or criminal detention, and shall also, or shall only, be fined not less than one time but not more than five times the illegal income; If the circumstances are especially serious, he shall be sentenced to fixed-term imprisonment of not less than five years, and shall also be fined not less than one time but not more than five times for illegal gains or confiscation of property:

1. Without permission, engaging in franchise or monopoly commodities or other commodities whose operation is restricted by laws and administrative regulations;

2. Buying and selling import and export licenses, import and export certificates of origin and other business licenses or approval documents stipulated by laws and administrative regulations;

3, without the approval of the relevant competent departments of the state, illegally engaged in securities, futures, insurance business, or illegally engaged in fund payment and settlement business;

4. Other illegal business operations that seriously disrupt the market order.