Photo taken with a mobile phone shows a bee collecting honey at Xiangshan Park in Beijing, capital of China, March 13, 2019. (Xinhua/Yin Dongxun)

　　Photo taken with a mobile phone shows a bee collecting honey at Xiangshan Park in Beijing, capital of China, March 13, 2019. (Xinhua/Yin Dongxun)

　　Photo taken with a mobile phone shows a bee collecting honey at Weiying Hutong in Beijing, capital of China, March 14, 2019. (Xinhua/Ding Hongfa)

　　Photo taken with a mobile phone shows blossoming flowers at Weiying Hutong in Beijing, capital of China, March 14, 2019. (Xinhua/Ding Hongfa)

　　Photo taken with a mobile phone shows the night scenery of Yulan magnolia flowers and the moon at Xuanwumen in Beijing, capital of China, March 18, 2019. (Xinhua/Li Renzi)

　　Photo taken with a mobile phone shows the spring scenery at Houhai area in Beijing, capital of China, March 6, 2019. (Xinhua/Li Renzi)