You have two options
1. The hotel can provide laundry service. Please consult the hotel for specific charges.  The daily cleaning has to be approved as soon as you confirm the reservation. This is more expensive.
2. Go to the laundry room to wash by yourself, which is more affordable.
There is a laundry room on the sixth floor, which provides dry cleaning services.
Detergent needs to be purchased with coins, as shown in the picture.
For how to use the laundry room, please refer to the instructions on the wall of the laundry room.