Aerial photo taken on Nov. 4, 2019 shows the scenery of Xiezi Mountain in Jinan, east China's Shandong Province. Smoke trees and pine trees growing on both sides of the ridge here present two colors during the autumn season. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows the scenery of Xiezi Mountain in Jinan, east China's Shandong Province. Smoke trees and pine trees growing on both sides of the ridge here present two colors during the autumn season. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows the scenery of Xiezi Mountain in Jinan, east China's Shandong Province. Smoke trees and pine trees growing on both sides of the ridge here present two colors during the autumn season. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows the scenery of Xiezi Mountain in Jinan, east China's Shandong Province. Smoke trees and pine trees growing on both sides of the ridge here present two colors during the autumn season. (Photo: Xinhua)

Aerial photo taken on Nov. 4, 2019 shows the scenery of Xiezi Mountain in Jinan, east China's Shandong Province. Smoke trees and pine trees growing on both sides of the ridge here present two colors during the autumn season. (Photo: Xinhua)