![](http://www.ecns.cn/hd/2020/04/29/14ce6a43e5d34c74bf462fbf96633b33.jpg)
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)
![](http://www.ecns.cn/hd/2020/04/29/b50a0159145f4fd68653c19af4401f03.jpg)
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)
![](http://www.ecns.cn/hd/2020/04/29/1db82087eeed460fa7e85546f5af230c.jpg)
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)
![](http://www.ecns.cn/hd/2020/04/29/1512fcf44cef40d28a758fba41513393.jpg)
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)
![](http://www.ecns.cn/hd/2020/04/29/30a7a417004c45a88b616703df54e0f5.jpg)
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)