This photo taken on Aug. 29, 2023 shows people visiting the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Chen Zhonghao)

This aerial photo taken on Aug. 29, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Yang Chenguang)

This aerial photo taken on Aug. 29, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Chen Zhonghao)

This photo taken on Aug. 30, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Liu Jinhai)

This aerial photo taken on Aug. 30, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Liu Jinhai)

This photo taken on Aug. 29, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Yang Chenguang)

This aerial photo taken on Aug. 29, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Yang Chenguang)

This aerial photo taken on Aug. 30, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Liu Jinhai)

This photo taken on Aug. 29, 2023 shows people visiting the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Yang Chenguang)

This aerial photo taken on Aug. 30, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Chen Zhonghao)

This aerial photo taken on Aug. 29, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Chen Zhonghao)

This aerial photo taken on Aug. 29, 2023 shows the Yanmen Pass in Daixian County, north China's Shanxi Province. The Yanmen Pass is a famed part of the Great Wall. The Great Wall, a UNESCO World Heritage Site, consists of many interconnected walls, some dating back 2,000 years. (Xinhua/Chen Zhonghao)