Aerial photo taken on Oct. 21, 2019 shows the scenery of the Hongyegu (Red Leaves Valley) scenic spot in Jinan, east China's Shandong Province. (Photo: Xinhua)

Aerial photo taken on Oct. 21, 2019 shows the scenery of the Hongyegu (Red Leaves Valley) scenic spot in Jinan, east China's Shandong Province. (Photo: Xinhua)

Aerial photo taken on Oct. 21, 2019 shows the scenery of the Hongyegu (Red Leaves Valley) scenic spot in Jinan, east China's Shandong Province. (Photo: Xinhua)

Aerial photo taken on Oct. 21, 2019 shows the scenery of the Hongyegu (Red Leaves Valley) scenic spot in Jinan, east China's Shandong Province. (Photo: Xinhua)

Aerial photo taken on Oct. 21, 2019 shows the scenery of the Hongyegu (Red Leaves Valley) scenic spot in Jinan, east China's Shandong Province. (Photo: Xinhua)