What's the difference between a four-star hotel and a quasi-four-star hotel?

The difference between four-star and quasi-four-star is listed and unlisted, which is also applicable to hotels with 12345 stars. Quasi-four-star facilities and standards have also reached the four-star standard, but the tourism department will not give so many hotels a star rating, so there is a difference between listed and unlisted hotels. Their rooms are generally not much different, such as the number of square meters and the corresponding supporting facilities. And the difference may be in the lobby, restaurant and other places.