Can boys under 20 and girls under 17 book a room in IU Hotel?

It can be opened.

However, you are not allowed to engage in illegal activities. Our country's laws do not prohibit citizens under the age of 18 from getting a hotel room. As long as they can show formal identification, they should be able to check in.

According to the provisions of Article 6 of my country's "Hotel Industry Public Security Management Measures": "Hotels must register for accommodation of tourists. When registering, the identity documents of passengers should be checked and the registration should be carried out truthfully according to the prescribed items." Legal basis: "Hotel Industry Public Security Management Measures" Article 6 Hotel Pick-up"