What star rating does the three diamonds belong to?

Are you asking "How many stars does a three-diamond hotel belong to?" It's two stars.

The "National Restaurant and Hotel Rating" is divided into 5 levels, and different levels are distinguished by the number of "diamonds" on the logo. Among them, for the evaluation of special-grade (five-diamond) and first-grade (four-diamond) restaurants and hotels, the enterprise first conducts self-evaluation, the local grading agency submits an application, and the National Grade Rating Committee organizes the review; the national second-grade (three-diamond) and third-grade restaurants The assessment of restaurants and hotels of Category 2 (two diamonds) and Category 4 (one diamond) hotels shall be organized by the Municipal Grading Rating Committee authorized by the National Grading Rating Committee and reported to the National Grading Rating Committee for review and filing.