This photo taken on Aug. 27, 2023 shows the Sigou Great Wall in Pianguan County, north China's Shanxi Province. The Great Wall built during the Ming Dynasty (1368-1644) encounters the Yellow River at the Laoniuwan section. (Xinhua/Chen Zhonghao)

This aerial photo taken on Aug. 27, 2023 shows the Sigou Great Wall in Pianguan County, north China's Shanxi Province. The Great Wall built during the Ming Dynasty (1368-1644) encounters the Yellow River at the Laoniuwan section. (Xinhua/Yang Chenguang)