View of zigzag watercourse of Yellow River in Sichuan

This aerial photo taken on Aug. 21, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Yijie)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 21, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 21, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 21, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 21, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Yijie)

This aerial photo taken on Aug. 21, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 24, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 24, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Xing Guangli)

Tourists enjoy the view of the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province, Aug. 21, 2023. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

Tourists enjoy the view of the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province, Aug. 22, 2023. (Xinhua/Wang Yijie)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)

This aerial photo taken on Aug. 22, 2023 shows the zigzag watercourse of the Yellow River in Tangke Township, Ruoergai County of Aba Tibetan-Qiang Autonomous Prefecture, southwest China's Sichuan Province. (Xinhua/Wang Xi)