Aerial photos taken on Nov. 4, 2020 show the autumn sceneries at the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

(Xinhua/Yang Shiyao)

(Xinhua/Yang Shiyao)

Photo taken on Nov. 4, 2020 shows the autumn scenery at the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

In this aerial photo taken on Nov. 4, 2020, tourists visit the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

In this aerial photo taken on Nov. 4, 2020, tourists visit the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

In this aerial photo taken on Nov. 4, 2020, tourists visit the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

Aerial photo taken on Nov. 4, 2020 shows the autumn scenery at the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

In this aerial photo taken on Nov. 4, 2020, tourists visit the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)

In this aerial photo taken on Nov. 4, 2020, tourists visit the Yumuling section of the Great Wall in Qianxi County, north China's Hebei Province. (Xinhua/Yang Shiyao)