A kid plays with a bubble machine near the Dianchi Lake in Kunming, southwest China's Yunnan Province, Oct. 13, 2021. (Xinhua/Li Yahui)

Tourists record a video clip through a mobile phone near the Dianchi Lake in Kunming, southwest China's Yunnan Province, Oct. 13, 2021. (Xinhua/Li Yahui)

A speedboat cruises on the Dianchi Lake in Kunming, southwest China's Yunnan Province, Oct. 13, 2021. (Xinhua/Li Yahui)

Visitors enjoy leisure time near the Dianchi Lake in Kunming, southwest China's Yunnan Province, Oct. 13, 2021. (Xinhua/Li Yahui)

Photo taken with a mobile phone on Oct. 13, 2021 shows a view of Kunming, southwest China's Yunnan Province. (Xinhua/Li Yahui)

A man views the scenery of the Dianchi Lake through a pair of binoculars in Kunming, southwest China's Yunnan Province, Oct. 13, 2021. (Xinhua/Li Yahui)

Citizens dance near the Dianchi Lake in Kunming, southwest China's Yunnan Province, Oct. 13, 2021. (Xinhua/Li Yahui)

Photo taken on Oct. 13, 2021 shows a view of Dianchi Lake in Kunming, southwest China's Yunnan Province. (Xinhua/Li Yahui)