Customers pay for the offshore duty-free products at a duty-free shopping mall in Haikou, south China's Hainan Province, Feb. 14, 2021. Offshore duty-free sales in China's island province of Hainan reached 997 million yuan (about 154.4 million U.S. dollars) during the 2021 Spring Festival holiday, an increase of 261 percent year on year, according to the data from Haikou Customs. (Xinhua/Pu Xiaoxu)