Aerial photo taken on Oct. 17, 2020 shows a view of red leaves at a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province. (Xinhua/Wang Xiao)

Tourists take selfies at a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province, Oct. 17, 2020. (Xinhua/Wang Xiao)

Aerial photo taken on Oct. 17, 2020 shows tourists visiting a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province. (Xinhua/Wang Xiao)

Tourists take selfies at a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province, Oct. 17, 2020. (Xinhua/Wang Xiao)

Aerial photo taken on Oct. 17, 2020 shows a view of red leaves at a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province. (Xinhua/Wang Xiao)

Aerial photo taken on Oct. 17, 2020 shows a view of red leaves at a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province. (Xinhua/Wang Xiao)

A tourist takes photos at a canyon in the Taihang Mountains in Shexian County, north China's Hebei Province, Oct. 17, 2020. (Xinhua/Wang Xiao)