Aerial photo taken on Aug. 14, 2019 shows the Qiankunwan river bend along the Yellow River, China's second-longest waterway, on the border between Yanchuan County, northwest China's Shaanxi Province and Yonghe County, north China's Shanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Aug. 14, 2019 shows the Qiankunwan river bend along the Yellow River, China's second-longest waterway, on the border between Yanchuan County, northwest China's Shaanxi Province and Yonghe County, north China's Shanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Aug. 14, 2019 shows the Qiankunwan river bend along the Yellow River, China's second-longest waterway, on the border between Yanchuan County, northwest China's Shaanxi Province and Yonghe County, north China's Shanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Aug. 13, 2019 shows the Qiankunwan river bend scenic area along the Yellow River, China's second-longest waterway, on the border between Yanchuan County, northwest China's Shaanxi Province and Yonghe County, north China's Shanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Aug. 13, 2019 shows tourist cable cars above the Qiankunwan river bend along the Yellow River, China's second-longest waterway, on the border between Yanchuan County, northwest China's Shaanxi Province and Yonghe County, north China's Shanxi Province. (Xinhua/Tao Ming)

Aerial photo taken on Aug. 14, 2019 shows the Qiankunwan river bend scenic area along the Yellow River, China's second-longest waterway, on the border between Yanchuan County, northwest China's Shaanxi Province and Yonghe County, north China's Shanxi Province. (Xinhua/Tao Ming)