Aerial photo taken on Dec. 11, 2019 shows the scenery of cherry valley on Wuliang Mountain at sunrise in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Photo taken on Dec. 10, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 11, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 11, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 10, 2019 shows the scenery of cherry valley on Wuliang Mountain at sunset in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 10, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 11, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 10, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 10, 2019 shows the scenery of cherry valley on Wuliang Mountain in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)

Aerial photo taken on Dec. 11, 2019 shows the scenery of cherry valley on Wuliang Mountain at sunrise in Yi Autonomous County of Nanjian, southwest China's Yunnan Province. (Xinhua/Hu Chao)