A drone photo taken on Jan. 4, 2025 shows birds flying at the Zhangjiangkou National Mangrove Nature Reserve in Yunxiao County, southeast China's Fujian Province. Located in the estuary of the Zhangjiang river, the Zhangjiangkou National Mangrove Nature Reserve covers an area of 2,360 hectares. It was listed as one of the Wetlands of International Importance under the Ramsar Convention on Wetlands in 2008. (Xinhua/Lin Shanchuan)