Pictures taken by a drone show cages being used for aquaculture projects floating in a bay in Lingao County, South China’s Hainan Province, Oct. 19, 2017. The county has more than 3,000 cages for deep-water aquaculture farming and produces an annual output of 24,000 tons of fish, with a market value of 720 million yuan ($109 million). Lingao County has Asia’s largest deep-water cage farming base. (Photo: China News Service/Luo Yunfei)