Aerial photo taken on July 28, 2020 shows clouds flowing over the Taihang Mountains in Xingtai, north China's Hebei Province. (Xinhua/Fan Shihui)

Photo taken on July 28, 2020 shows clouds flowing over the Taihang Mountains in Xingtai, north China's Hebei Province. (Xinhua/Fan Shihui)

Aerial photo taken on July 28, 2020 shows clouds flowing over the Taihang Mountains in Xingtai, north China's Hebei Province. (Xinhua/Fan Shihui)

Aerial photo taken on July 28, 2020 shows clouds flowing over the Taihang Mountains in Xingtai, north China's Hebei Province. (Xinhua/Fan Shihui)