Is it illegal to sell masks in a circle of friends?

It is legal to sell masks in a circle of friends, and there are corresponding qualification certificates. Medical masks, as a kind of medical supplies, belong to the second class of medical devices, so the sales of medical masks must be provided with the purchase receipt, supplier's (individual's) qualification certificate and product qualification certificate in addition to the business license and the second class medical operation record certificate. According to Article 63 of the Regulations on the Supervision and Administration of Medical Devices, those who produce and operate Class II and Class III medical devices without a medical device registration certificate, and those who illegally produce and operate medical devices whose value is less than 654.38+10,000 yuan, shall be fined between 50,000 yuan and 654.38+10,000 yuan, and those whose value is more than 654.38+10,000 yuan shall be fined. Article 65 stipulates that those who fail to file records in accordance with the provisions of these regulations shall be ordered by the pharmaceutical supervisory and administrative department to make corrections within a time limit, and those who fail to make corrections within the time limit may be fined 1000 yuan; Article 66 stipulates that those who engage in unlicensed, expired, invalid or obsolete medical devices, if the value of illegally operated medical devices is less than 10000 yuan, shall be fined from 20,000 yuan to 50,000 yuan, and those whose value exceeds 10 yuan shall be fined from 5 times to 0 times.