What does the A in 4A in tourist attractions mean?

It is understood that my country currently divides the quality levels of tourist areas (spots) into four levels from high to low, which are AAAA, AAA, AA, and A-level tourist areas (spots). 4A-level scenic spots are based on the national standards of "Classification and Assessment of Quality Grades of Tourist Attractions" and the "Measures for the Management of Quality Grade Assessment of Tourist Attractions", after preliminary evaluation and recommendation by the Provincial Tourist Attractions Quality Grade Evaluation Committee, and by the National Tourist Attractions Quality Grade Evaluation Committee. . The division and evaluation of the four levels of scenic spots are based on 10 aspects of data including tourist transportation, sightseeing, tourism safety, sanitation, communications, tourism shopping, comprehensive management, number of tourists received, tourism resources and environmental protection, and quality of tourism resources.