Are bathtubs disinfected in hotels like Shangri-La (domestic)? Can I use it directly?

The bathtub should be disinfected, but it is not recommended to use it directly. No matter how high the star rating of the hotel is, the rules of room service and cleaning are similar. Because it's all made by people. For example, the glass of the hotel should be cleaned every time, but almost all the workers use toilet brushes to clean it. So go to the hotel, either bring your own water cup or use a disposable one. If you want to take a bath, take it. These two days are not bad.