What do you mean by AAA tourist attractions? What does AAA stand for?

According to the classification and evaluation of the quality grades of tourist areas (spots), tourist areas (spots) are divided into five grades: AAAAAA, AAAA, AAA, AA and A, and evaluated according to the environmental quality, landscape quality, service quality and tourists' opinions. AAAAAA-level and AAAA-level tourist attractions (spots) are recommended by provincial tourism administrative departments and assessed by quality rating agencies of the National Tourism Administration. AAAAAA-level tourist attractions are produced in AAAA-level tourist attractions. AAA, AA and A tourist areas (spots) are assessed by the quality rating agencies of tourist areas (spots) of provincial tourism administrative departments and reported to the National Tourism Administration for the record.