In the teahouse on the second floor, in order to attract people, the stairs should not be narrow and crowded, otherwise it will produce a sense of depression and make guests reluctant to patronize. The ideal staircase should be wide, which not only looks comfortable, but also gives consideration to safety.
Don't have too many doors. The most taboo is that every door can see the middle of the whole business place and you can't see it all at once.