It is a Cantonese mask. There is a word on it to remind us not to wear the mask backwards. Its design is still very user-friendly.

Offline, you can go to pharmacies in your area to buy it. Online, you can buy it on Taobao and Pinduoduo.

A mask is a sanitary product. It generally refers to a device worn on the mouth and nose to filter the air entering the mouth and nose to prevent harmful gases, odors, and droplets from entering and exiting the wearer's mouth and nose. Made of gauze or paper. Masks have a certain filtering effect on the air entering the lungs. Wearing masks has a very good effect when respiratory infectious diseases are prevalent and when working in dust and other polluted environments. Masks can be divided into air filter masks and air supply masks.