Tourists view maple leaves on Yuelu Mountain in Changsha, central China's Hunan Province, Dec. 7, 2019. (Xinhua/Xue Yuge)

Tourists take a selfie before maple leaves on Yuelu Mountain in Changsha, central China's Hunan Province, Dec. 7, 2019. (Xinhua/Xue Yuge)

Tourists take a selfie before maple leaves on Yuelu Mountain in Changsha, central China's Hunan Province, Dec. 7, 2019. (Xinhua/Xue Yuge)

Tourists enjoy maple leaves on Yuelu Mountain in Changsha, central China's Hunan Province, Dec. 7, 2019. (Xinhua/Xue Yuge)

A tourist takes photos of maple leaves on Yuelu Mountain in Changsha, central China's Hunan Province, Dec. 7, 2019. (Xinhua/Xue Yuge)

Aerial photo taken on Dec. 7, 2019 shows scenery of Yuelu Mountain in Changsha, central China's Hunan Province. (Xinhua/Xue Yuge)

Photo taken on Dec. 7, 2019 shows maple leaves on Yuelu Mountain in Changsha, central China's Hunan Province. (Xinhua/Xue Yuge)