Are there six-star hotels in the world?

The official review should only be 5 stars. Many newly built 5-star hotels claim to be 6-star because their standards exceed 5-star. \x0d\\x0d\The national review now only has platinum and five stars. \x0d\\x0d\Some overseas hotel chains hang their own stars. Xiamen will also build a so-called 7-star hotel on the sea.