Consumers shop at a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)

Consumers shop at a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)

A consumer shops at a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)

A consumer shops at a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)

Consumers shop at a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)

Consumers visit a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)

A consumer shops at a duty-free store in Haikou, capital of south China's Hainan Province, Oct. 4, 2020. Duty-free stores in Haikou on Sunday saw scores of consumers on the fourth day of the National Day and Mid-Autumn Festival holiday. (Xinhua/Pu Xiaoxu)