A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)

A drone photo taken on July 28, 2025 shows scenery at the Naoli River National Natural Reserve, northeast China's Heilongjiang Province. (Photo by Sheng Jingli/Xinhua)