How to drain the Vienna sink?

There is a button on the faucet of Vienna sink, which can drain water when pressed.

When staying in a hotel, you can call the front desk of the hotel and ask the hotel staff for help.

Established in 1993, Vienna Hotel takes "comfort and elegance, top-class food, luxurious quality, safety and environmental protection, music and art, leading health" as its core values. It has four brands: Venus Royal Hotel, Vienna International Hotel, Vienna Hotel and three good hotels.