Photo taken with a mobile phone shows blooming flowers at the Beijing Ming Dynasty City Wall Relics Park in Beijing, capital of China, March 21, 2019. (Xinhua/Luo Xiaoguang)

　　Photo taken with a mobile phone shows people taking photos of sunset at Yuyuantan Park in Beijing, capital of China, March 22, 2019. (Xinhua/Pan Siwei)

　　Photo taken with a mobile phone shows blooming flowers at Yuyuantan Park in Beijing, capital of China, March 22, 2019. (Xinhua/Pan Siwei)

　　Photo taken with a mobile phone shows blooming flowers at the Beijing Ming Dynasty City Wall Relics Park in Beijing, capital of China, March 21, 2019. (Xinhua/Luo Xiaoguang)

　　Photo taken with a mobile phone shows blooming flowers in Beijing, capital of China, March 23, 2019. (Xinhua/Li Bin)

　　Photo taken with a mobile phone shows blooming flowers at the Beijing Ming Dynasty City Wall Relics Park in Beijing, capital of China, March 21, 2019. (Xinhua/Luo Xiaoguang)