People visit a wetland in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region, June 27, 2022. (Xinhua/Bei He)

　　Aerial photo taken on June 27, 2022 shows the scenery of a wetland in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region. (Xinhua/Bei He)

　　Aerial photo taken on June 27, 2022 shows the scenery of a wetland in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region. (Xinhua/Wang Zecong)

　　Photo taken on June 27, 2022 shows the scenery of a wetland in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region. (Xinhua/Bei He)

　　Aerial photo taken on June 27, 2022 shows the scenery of a wetland in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region. (Xinhua/Bei He)

　　Aerial photo taken on June 27, 2022 shows the scenery of a wetland in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region. (Xinhua/Wang Zecong)

　　Photo taken on June 27, 2022 shows the scenery of white birch in Ergun, Hulun Buir City, north China's Inner Mongolia Autonomous Region. (Xinhua/Wang Zecong)