What's the difference between a 7-day economy room and an independent big bed room?

Difference between Economy Room and Big Bed Room, Double Room and Business Room in 7 Days Hotel Chain

For the convenience of friends staying in the hotel, through my 7-day experience, I will briefly summarize the differences between four types of rooms: economy room, independent queen room, independent double room and business queen room.

Economy room:

Building area:13-15m2

Windows: Some have no windows.

Bed: 1 bed, no extra bed.

Bed size:1.35m× 2m.

Occupancy: 2 people+1 child

Broadband: free wired broadband Internet access and free WIFI Internet access.

Daily necessities: 1 bath towel, 1 floor towel, 1 cotton core pillow, 1 buckwheat pillow.

Autonomous queen room:

Building area:16-20m2

Window: Yes.

Bed: 1 bed, no extra bed.

Bed size: 1.8m× 2m.

Occupancy: 2 people+1 child

Broadband: free wired broadband Internet access and free WIFI Internet access.

Daily necessities: 1 bath towel, 1 floor towel, 1 cotton core pillow, 1 buckwheat pillow.

Independent double room:

Building area:16-20m2

Window: Yes.

Bed: 2 beds, no extra bed.

Bed size:1.35m× 2m.

Occupancy: 2 people+1 child

Broadband: free wired broadband Internet access and free WIFI Internet access.

Daily necessities: 2 bath towels, 1 floor towels and 2 cotton-core pillows.

Business big bed room:

Building area:16-20m2

Window: Yes.

Bed: 1 bed, no extra bed.

Bed size: 1.8m× 2m.

Occupancy: 2 people

Broadband: free wired broadband Internet access and free WIFI Internet access.

Configuration of daily necessities: 1 bottle of bottled water and 1 set of daily necessities (including 1 set of toiletries, 1 bag of shampoo and 1 bag of shower gel) are provided free of charge, and each room is given away according to the actual number of registered people (up to 2 copies).