Why did Hanting Hotel take ID photo and travel itinerary code?

Hanting Hotel should take ID photo and travel itinerary code. The public security department stipulates that hotel accommodation must be presented and registered with ID card. After booking a hotel online, you must show and register your ID card when you go to the hotel. If the subscriber is a check-in, he/she needs to show his/her ID card. If the subscriber does not sign in, he/she does not need an ID card.