Two white-naped cranes are released into the wild by staff members at the Jiangxi Poyang Lake National Nature Reserve in east China's Jiangxi Province, Dec. 8, 2019. A total of 120 cured migrant birds were released into the wild in Jiangxi on Sunday. (Xinhua/Wan Xiang)

A white stork is released into the wild by staff members at the Jiangxi Poyang Lake National Nature Reserve in east China's Jiangxi Province, Dec. 8, 2019. A total of 120 cured migrant birds were released into the wild in Jiangxi on Sunday. (Xinhua/Wan Xiang)

Staff members release a white stork into the wild at the Jiangxi Poyang Lake National Nature Reserve in east China's Jiangxi Province, Dec. 8, 2019. A total of 120 cured migrant birds were released into the wild in Jiangxi on Sunday. (Xinhua/Wan Xiang)

A swan goose (L) is released into the wild by staff members at the Jiangxi Poyang Lake National Nature Reserve in east China's Jiangxi Province, Dec. 8, 2019. A total of 120 cured migrant birds were released into the wild in Jiangxi on Sunday. (Xinhua/Wan Xiang)