People go for a walk at Yuandadu Park in Beijing, capital of China, April 9, 2018. As the temperature turns warmer in Beijing, spring is in the air. (Xinhua/Li Xin)

People enjoy the view of flowers at Yuandadu Park in Beijing, capital of China, April 9, 2018. As the temperature turns warmer in Beijing, spring is in the air. (Xinhua/Li Xin)