How do you say the warm reminder of wearing a mask?

1. If you have a meeting in the conference room, you must wear a mask.

2. If you work in the office and workshop, you must wear a mask.

3. If you are a service worker in shops, public transportation, restaurants, canteens, hotels, entrances and exits of units and communities, and the front desk of enterprises, you must wear disposable medical masks or surgical masks.

4. If you are a teacher, attendant, cleaner, canteen and other campus staff in kindergartens, you must wear disposable medical masks or surgical masks.

5. If you are the attendant, cleaner and canteen staff in primary and secondary schools, you must wear disposable medical masks or surgical masks.