What is the exclusive whirlwind room voucher of Atour at?

The cyclone room upgrade voucher of Atour Hotel is used for room upgrade.

You can upgrade to a higher room than you booked. The full name of the upgraded room of Atour Hotel is room upgrade. It is to upgrade you to a more upscale and comfortable room on the basis of your reservation. There are several situations in which you can upgrade your room. First, you are a senior member of Atour Hotel and have stayed in Atour Hotel for many times. Therefore, you can become a senior member after entering the house at night and enjoy the room upgrade treatment. Another situation is that the cleanliness of the room or the hardware facilities of the room have an impact on your stay experience. After the complaint, upgrade the high-end room.