Hello, the central dormitory is still the same, only recently installed air conditioning, but that's all. There are two kinds of rooms in the central area. One is that there is no separate bathroom in the dormitory and you need to go to the public bathroom on the floor. Some have bathrooms, but they are shared by two rooms.
As for how to allocate dormitories, I have never heard of any lottery, that is, the college randomly allocates students.
I hope I can help you!