Without a door, just stand in the rain and swipe your card. If you lean against it, you will come out of the water. If you take it off, you will automatically stop the water supply. There are often queues in summer, and the Nannong Bath Gate incident was reported in the newspaper. You can search under Baidu, hehe. However, some graduate dormitories have separate bathrooms and water heaters. Undergraduates will feel very uncomfortable if they don't go to the toilet, in Nanyuan.

[Note] Personal opinions are for reference only and hope to be adopted.