2. Office, conference room, computer room, Internet cafe, basement and smoking area.

3. Steaming rooms, shops, beauty salons, restaurants, cafes, fast food restaurants and teahouses.

4. Hospitals, clinics, sanatoriums, schools, study classes and nurseries

5. Department stores, restaurants, steaming rooms, supermarkets, playgrounds, cold storage, shopping centers, mahjong halls, chess and card rooms, public toilets, KTV, pet shops, gyms, etc.