I used to be a real estate agent, not an expert, but I still know very well that a regular one-bedroom apartment is one bedroom, one living room and one bathroom.

As far as I know, Hall 0 you mentioned should be a single room, that is, a square room with a small bathroom.

However, there is no such apartment in the regular community, so it may be one of two or three bedrooms, with a master bedroom or a second bedroom and a separate bathroom.