An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Yu Lan)

An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Yu Lan)

An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Chen Bin)

An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Yu Lan)

An aerial drone photo taken on July 10, 2025 shows a camp at the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Yu Lan)

An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Chen Bin)

An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Ma Ning)

An aerial drone photo taken on July 10, 2025 shows a rape flower field at the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Yu Lan)

An aerial drone photo taken on July 10, 2025 shows a camp at the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Ma Ning)

An aerial drone photo taken on July 10, 2025 shows the scenery of the Sangke Grassland in Xiahe County, Gannan Tibetan Autonomous Prefecture, northwest China's Gansu Province. (Xinhua/Chen Bin)