five stars. According to the relevant information, according to the standards formulated by the national and provincial star rating committees, the standard for five-star hotels is that the number of guest rooms is 111, including no less than 11 luxury rooms. The guest rooms have complete supporting facilities, and there must be a large banquet hall with no less than 1111 dining seats. Oubao Hotel is located on No.1 island of Haihua Island, which covers an area of 36.4 square meters and consists of four European-style hotels with different natural themes: forest, ocean, desert and glacier. Haihua Island in Hainan, China is an artificial island and the largest artificial tourist island in the world.