A customer tries out lipsticks at a duty-free shop in Haikou, capital of south China's Hainan Province Jan. 7, 2021. Offshore duty-free shops in China's island province of Hainan have raked in more than 32 billion yuan (about 4.9 billion U.S. dollars) in sales in 2020. (Photos: Xinhua)

A sales assistant packs purchased products at a duty-free shop in Haikou, capital of south China's Hainan Province Jan. 7, 2021. Offshore duty-free shops in China's island province of Hainan have raked in more than 32 billion yuan (about 4.9 billion U.S. dollars) in sales in 2020.

A customer selects perfume products at a duty-free shop in Haikou, capital of south China's Hainan Province Jan. 7, 2021. Offshore duty-free shops in China's island province of Hainan have raked in more than 32 billion yuan (about 4.9 billion U.S. dollars) in sales in 2020.

Sales assistants arrange purchased products at a duty-free shop in Haikou, capital of south China's Hainan Province Jan. 7, 2021. Offshore duty-free shops in China's island province of Hainan have raked in more than 32 billion yuan (about 4.9 billion U.S. dollars) in sales in 2020.

A customer selects cosmetic products at a duty-free shop in Haikou, capital of south China's Hainan Province Jan. 7, 2021. Offshore duty-free shops in China's island province of Hainan have raked in more than 32 billion yuan (about 4.9 billion U.S. dollars) in sales in 2020.

A customer selects perfume products at a duty-free shop in Haikou, capital of south China's Hainan Province Jan. 7, 2021. Offshore duty-free shops in China's island province of Hainan have raked in more than 32 billion yuan (about 4.9 billion U.S. dollars) in sales in 2020.