This aerial panoramic photo taken on July 13, 2023 shows Jiayu Pass, a famed part of the Great Wall, in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
LANZHOU, Dec. 10 (Xinhua) -- Gansu Province is home to multiple sections of the Great Wall that add up to 3,654 kilometers in length. The Hexi Corridor, a critical part of the ancient Silk Road winding through the south of the province, boasts more than 1,400 kilometers of the Wall built in the Han Dynasty (202 BC-220 AD) and over 1,200 kilometers erected in the Ming Dynasty (1368-1644). Gansu is, therefore, dubbed "an open-air museum of the Great Wall." 
This photo taken on July 16, 2023 shows a part of the Great Wall in Tianzhu Tibetan Autonomous County in Wuwei, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
A part of the Great Wall is seen in Yemawan village of Xincheng township, Jiayuguan City, northwest China's Gansu Province, July 14, 2023. (Xinhua/Liu Jinhai)
This photo taken on July 16, 2023 shows a worn-out part of the Great Wall in Tianzhu Tibetan Autonomous County in Wuwei, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
A worn-out part of the Great Wall is seen in Tianzhu Tibetan Autonomous County in Wuwei, northwest China's Gansu Province, July 16, 2023. (Xinhua/Liu Jinhai)
This photo taken on Sept. 6, 2022 shows the Hecangcheng relic site in Dunhuang, northwest China's Gansu Province. (Photo by Zhang Xiaoliang/Xinhua)
This aerial photo taken on July 13, 2023 shows Jiayu Pass, a famed part of the Great Wall, in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This aerial photo taken on July 14, 2023 shows Jiayu Pass, a famed part of the Great Wall, in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Fang Xin)
This aerial photo taken on July 12, 2023 shows a part of the Great Wall in Minqin County of Wuwei, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This aerial photo taken on July 16, 2023 shows a part of the Great Wall in Tianzhu Tibetan Autonomous County in Wuwei, northwest China's Gansu Province. (Xinhua/Liu Jinhai)
This aerial photo taken on May 16, 2023 shows a worn-out watchtower of the Great Wall in Shandan County of Zhangye City, northwest China's Gansu Province. (Xinhua/Chen Bin)
This aerial photo taken on July 13, 2023 shows Jiayu Pass, a famed part of the Great Wall, in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Liu Jinhai)
This aerial photo taken on July 16, 2023 shows a worn-out part of the ancient Great Wall in Tianzhu Tibetan Autonomous County in Wuwei, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This aerial photo taken on July 15, 2023 shows a part of the Great Wall in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Liu Jinhai)
This aerial photo taken on July 15, 2023 shows a part of the Great Wall in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This aerial photo taken on July 15, 2023 shows a relic site in Shandan County of Zhangye City, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This photo taken on July 14, 2023 shows a part of the Great Wall to the south of the Jiayu Pass in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This aerial photo taken on May 15, 2023 shows parallel parts of the Great Wall built in the Han Dynasty (202 BC-220 AD) and the Ming Dynasty (1368-1644), respectively, in Shandan County of Zhangye City, northwest China's Gansu Province. (Xinhua/Chen Bin)
This aerial photo taken on July 15, 2023 shows a part of the Great Wall in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Fang Xin)
This photo taken on July 16, 2023 shows a part of the Great Wall in Tianzhu Tibetan Autonomous County in Wuwei, northwest China's Gansu Province. (Xinhua/Chen Zhonghao)
This aerial photo taken on July 15, 2023 shows a part of the Great Wall in Jiayuguan City, northwest China's Gansu Province. (Xinhua/Fang Xin)■
