Aerial photo taken on March 25, 2018 shows part of the 35-kilometer seaside sightseeing highway in Wanning, South China’s Hainan province. [Photo/Xinhua]

Aerial photo taken on March 25, 2018 shows part of the 35-kilometer seaside sightseeing highway in Wanning, South China’s Hainan province. [Photo/Xinhua]

Aerial photo taken on March 25, 2018 shows part of the 35-kilometer seaside sightseeing highway in Wanning, South China’s Hainan province. [Photo/Xinhua]

Aerial photo taken on March 25, 2018 shows part of the 35-kilometer seaside sightseeing highway in Wanning, South China’s Hainan province. [Photo/Xinhua]