Photo taken on Aug. 25, 2020 shows the Hainan International Convention and Exhibition Center (second-phase) project under construction in Haikou, south China's Hainan Province. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)

Aerial photo taken on Aug. 25, 2020 shows the Hainan International Convention and Exhibition Center (second-phase) project under construction at Haikou, south China's Hainan Province. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)

Photo taken on Aug. 25, 2020 shows the Hainan International Convention and Exhibition Center (second-phase) project under construction in Haikou, south China's Hainan Province. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)

Photo taken on Aug. 25, 2020 shows the Hainan International Convention and Exhibition Center (second-phase) project under construction in Haikou, south China's Hainan Province. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)

A worker is busy at the construction site of the Hainan International Convention and Exhibition Center (second-phase) project in Haikou, south China's Hainan Province, Aug. 25, 2020. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)

A worker is busy at the construction site of the Hainan International Convention and Exhibition Center (second-phase) project in Haikou, south China's Hainan Province, Aug. 25, 2020. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)

Photo taken on Aug. 25, 2020 shows the Hainan International Convention and Exhibition Center (second-phase) project under construction in Haikou, south China's Hainan Province. The key works of the project have been completed recently. (Xinhua/Pu Xiaoxu)