An aerial drone photo taken on Aug. 19, 2025 shows the scenery along the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region. (Xinhua/Ma Jinrui)

A drone photo taken on Aug. 19, 2025 shows the scenery along the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region. (Xinhua/Ma Jinrui)

People ride horses near the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region on Aug. 19, 2025. (Xinhua/Ma Jinrui)

A drone photo taken on Aug. 19, 2025 shows the scenery along the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region. (Xinhua/Ma Jinrui)

This photo taken on Aug. 19, 2025 shows the scenery along the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region. (Xinhua/Ma Jinrui)

An aerial drone photo taken on Aug. 19, 2025 shows the scenery along the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region. (Xinhua/Ma Jinrui)

This photo taken on Aug. 19, 2025 shows the scenery along the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region. (Xinhua/Ma Jinrui)

A tourist rests on the grass near the Mergel Gol River in Hulun Buir, north China's Inner Mongolia Autonomous Region on Aug. 19, 2025. (Xinhua/Ma Jinrui)