It is true that you can buy three golds in duty-free shops in Sanya. According to public materials related to the investigation, duty-free shops refer to sales places and supervised warehouses for storing duty-free goods that are approved by the General Administration of Customs and set up by business units in locations approved by the State Council of the People's Republic of China or its authorized departments that comply with customs supervision requirements. , a store that sells and supplies duty-free goods to specified objects. Duty-free shops in my country mainly include port duty-free shops, transportation duty-free shops, city duty-free shops, diplomat duty-free shops, ship supply duty-free shops and foreign exchange duty-free shops for Chinese people going abroad.