Photo taken on Aug. 31, 2019 shows a view of the Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province. (Photo: Xinhua)

A visitor tours at Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province, Aug. 31, 2019. (Photo: Xinhua)

A visitor tours at Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province, Aug. 31, 2019. (Photo: Xinhua)

Aerial photo taken on Aug. 31, 2019 shows a view of the Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province. (Photo: Xinhua)

Visitor tour at Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province, Aug. 31, 2019. (Photo: Xinhua)

Visitors walk on a suspension bridge at the Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province, Aug. 31, 2019. (Photo: Xinhua)

Panorama aerial photo taken on Aug. 31, 2019 shows a view of the Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province. (Photo: Xinhua)

Aerial photo taken on Aug. 31, 2019 shows a view of the Tianmeng Mountain scenic spot in Feixian County of Linyi City, east China's Shandong Province. (Photo: Xinhua)