What does the bid opening room with four people mean?

It means they are all friends.

You have to look at the configuration of the so-called standard rooms in the hotel. Almost every hotel in China has different standard rooms. There are standard rooms with double beds, standard rooms with twin beds, and standard rooms with three beds. So if you Four people need to communicate with the hotel, otherwise they will refuse to check you in when you arrive at the hotel. In theory, it is okay for children to share rooms with adults, but if you have four adults, it is definitely not possible. This is required by a document issued by the Ministry of Public Security.

Standard room refers to a room where the bedroom, work area, and reception area are in the same room, and there is a separate bathroom. Standard rooms are divided into standard double rooms and standard double rooms, which are commonly known as standard single or standard double rooms. It is the most economical room type in every hotel. In order to distinguish between ordinary and luxurious rooms, some hotels also have various types of standard rooms, such as ordinary standard rooms, business standard rooms, deluxe standard rooms and executive standard rooms. According to Different levels, types of decoration or configurations are distinguished.