This photo taken on Nov. 28, 2016 shows tourists lining up at a cashier of Sanya International Duty Free City in Sanya, south China's Hainan Province. Since introducing relevant policies 12 years ago, south China's island province of Hainan has recorded total offshore duty-free sales of 202.4 billion yuan (about 28.19 billion U.S. dollars), according to local authorities. (Xinhua/Yang Guanyu)