Remember to lock the door when you go out. You'd better take all valuables with you. If it is inconvenient to carry, you can usually put it at the front desk of the hotel.
3. Pay attention to hygiene after check-in. Try not to wash your face with a hotel towel. It is best to bring your own or use it once.
4. Keep the check-in voucher and room magnetic card for use when checking out.