A child feeds black-headed gulls at the Daguan Park in Kunming, southwest China's Yunnan Province, Feb. 16, 2021. (Xinhua/Chen Xinbo)

A woman feeds a black-headed gull at the Daguan Park in Kunming, southwest China's Yunnan Province, Feb. 16, 2021. (Xinhua/Chen Xinbo)

Photo taken on Feb. 16, 2021 shows black-headed gulls at the Daguan Park in Kunming, southwest China's Yunnan Province. (Xinhua/Chen Xinbo)

Photo taken on Feb. 16, 2021 shows flowers at the Daguan Park in Kunming, southwest China's Yunnan Province. (Xinhua/Chen Xinbo)

People row at the Daguan Park in Kunming, southwest China's Yunnan Province, Feb. 16, 2021. (Xinhua/Chen Xinbo)

People visit the Daguan Park in Kunming, southwest China's Yunnan Province, Feb. 16, 2021. (Xinhua/Chen Xinbo)