A drone photo taken on June 13, 2026 shows oriental white storks tending their chicks at Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 12, 2026 shows a roe deer foraging at Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 13, 2026 shows a view of Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 12, 2026 shows an oriental white stork tending its chicks at Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 12, 2026 shows a lynx foraging at Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 13, 2026 shows a view of Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 13, 2026 shows a view of Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 12, 2026 shows a view of Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 13, 2026 shows a view of Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)

A drone photo taken on June 12, 2026 shows an oriental white stork foraging at Nanweng River National Nature Reserve in northeast China's Heilongjiang Province. This nature reserve, which serves as a critical ecological barrier on the Songnen Plain, is also a wetland of international importance and key area for biodiversity. (Photo by Zhuang Yu/Xinhua)