During the normal period, the retail market of masks in this city sells about 10000 masks a day. After the outbreak, by allocating inventory and making full use of every day to seize production, in addition to giving priority to ensuring the needs of medical staff and front-line staff of epidemic prevention work, our city put 3 million masks into the retail market such as pharmacy for three consecutive days during the Spring Festival. Now there are 1.8-2 million retail markets per day. With the gradual return of employees to Shanghai, the production of masks will be further improved. From the current demand, there is still a big gap in the supply of masks. After professional guidance and scientific and reasonable use, mask demand will return to rationality. While we continue to do our best to coordinate production and increase production capacity, we also hope that citizens will not panic, rush to buy, hoard or waste. As for the use of masks, they should be used scientifically according to needs and functions to avoid excessive use. They should be left to those who need them most, especially the general protection, not to occupy precious medical resources.