Customers shop at a duty-free store in Bo'ao, South China's Hainan Province on July 4, 2022. By the end of June, offshore duty-free sales in Hainan had hit 90.6 billion yuan ($13.55 billion), since the island province raised its annual tax-free shopping quota from 30,000 yuan to 100,000 yuan per person on July 1, 2020, local customs data showed. Photo: cnsphoto