A drone photo taken on Aug. 11, 2026 shows water birds at Fujin National Wetland Park in Jiamusi, northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Qu Yubao/Xinhua)

A drone photo taken on Aug. 9, 2026 shows water birds at Fujin National Wetland Park in Jiamusi, northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Qu Yubao/Xinhua)

An aerial drone photo taken on Aug. 10, 2026 shows great crested grebes foraging in a wetland in Hulin City of northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Huang Yongxing/Xinhua)

An aerial drone photo taken on Aug. 11, 2026 shows egrets foraging in a wetland of Honghe National Nature Reserve in northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Liu Wanping/Xinhua)

A drone photo taken on Aug. 5, 2026 shows oriental storks at Nanwenghe National Nature Reserve in northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on Aug. 14, 2026 shows bean geese foraging in the wetland of a national nature reserve in northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Zhuang Yu/Xinhua)

A swallow feeds its babies in a wetland in Qiqihar, northeast China's Heilongjiang Province, Aug. 5, 2026. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Wang Yonggang/Xinhua)

A drone photo taken on Aug. 11, 2026 shows an egret foraging in a wetland in Hulin City of northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Huang Yongxing/Xinhua)

A swallow feeds its baby in a wetland in Qiqihar, northeast China's Heilongjiang Province, Aug. 2, 2026. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Wang Yonggang/Xinhua)

Water birds forage in a wetland in Baiquan County in northeast China's Heilongjiang Province, Aug. 14, 2026. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Lyu Shuxin/Xinhua)

A drone photo taken on Aug. 12, 2026 shows water birds at Fujin National Wetland Park in Jiamusi, northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Qu Yubao/Xinhua)

An aerial drone photo taken on Aug. 11, 2026 shows egrets in a wetland of Honghe National Nature Reserve in northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Liu Wanping/Xinhua)

An aerial drone photo taken on Aug. 5, 2026 shows the sunrise at Nanwenghe National Nature Reserve in northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on Aug. 11, 2026 shows white-naped cranes at Fujin National Wetland Park in Jiamusi, northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Qu Yubao/Xinhua)

A drone photo taken on Aug. 10, 2026 shows great crested grebes foraging in a wetland in Hulin City of northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Huang Yongxing/Xinhua)

An aerial drone photo taken on Aug. 10, 2026 shows egrets foraging in a wetland in Hulin City of northeast China's Heilongjiang Province. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Huang Yongxing/Xinhua)

Water birds forage in a wetland in Baiquan County in northeast China's Heilongjiang Province, Aug. 13, 2026. In recent years, the number of migratory birds to Heilongjiang Province has rebounded thanks to sustained ecological efforts. (Photo by Lyu Shuxin/Xinhua)