'Ocean farm' on land in South China's Hainan(1/5)

The artificial cultivation of coral was displayed in the land-based coral and giant clam breeding base in Wanning City, Hainan Province, April 28, 2020. The artificial cultivation of marine life, such as coral, tridacna and seaweed, forms a small ecological system to achieve zero discharge of pollutants and zero drug use of breeding, which will finally be used to repair the marine ecological environment. (Photo: China News Service/Luo Yunfei)

The artificial cultivation of coral was displayed in the land-based coral and giant clam breeding base in Wanning City, Hainan Province, April 28, 2020. The artificial cultivation of marine life, such as coral, tridacna and seaweed, forms a small ecological system to achieve zero discharge of pollutants and zero drug use of breeding, which will finally be used to repair the marine ecological environment. (Photo: China News Service/Luo Yunfei)

The artificial cultivation of coral was displayed in the land-based coral and giant clam breeding base in Wanning City, Hainan Province, April 28, 2020. The artificial cultivation of marine life, such as coral, tridacna and seaweed, forms a small ecological system to achieve zero discharge of pollutants and zero drug use of breeding, which will finally be used to repair the marine ecological environment. (Photo: China News Service/Luo Yunfei)

The artificial cultivation of coral was displayed in the land-based coral and giant clam breeding base in Wanning City, Hainan Province, April 28, 2020. The artificial cultivation of marine life, such as coral, tridacna and seaweed, forms a small ecological system to achieve zero discharge of pollutants and zero drug use of breeding, which will finally be used to repair the marine ecological environment. (Photo: China News Service/Luo Yunfei)

The artificial cultivation of coral was displayed in the land-based coral and giant clam breeding base in Wanning City, Hainan Province, April 28, 2020. The artificial cultivation of marine life, such as coral, tridacna and seaweed, forms a small ecological system to achieve zero discharge of pollutants and zero drug use of breeding, which will finally be used to repair the marine ecological environment. (Photo: China News Service/Luo Yunfei)