Photo taken on May 12, 2020 shows the construction site of Haikou Duty-Free Shopping Complex in Haikou, south China's Hainan Province. (Xinhua/Pu Xiaoxu)

Workers work at the construction site of Haikou Duty-Free Shopping Complex in Haikou, south China's Hainan Province, May 12, 2020. (Xinhua/Pu Xiaoxu)

Workers work at the construction site of Haikou Duty-Free Shopping Complex in Haikou, south China's Hainan Province, May 12, 2020. (Xinhua/Pu Xiaoxu)

Workers work at the construction site of Haikou Duty-Free Shopping Complex in Haikou, south China's Hainan Province, May 12, 2020. (Xinhua/Pu Xiaoxu)

A worker works at the construction site of Haikou Duty-Free Shopping Complex in Haikou, south China's Hainan Province, May 12, 2020. (Xinhua/Pu Xiaoxu)

Workers work at the construction site of Haikou Duty-Free Shopping Complex in Haikou, south China's Hainan Province, May 12, 2020. (Xinhua/Pu Xiaoxu)