Pinwheel fair held in Beijing

A child views pinwheels during a pinwheel fair held at the China National Children's Center in Beijing, capital of China, April 7, 2019. (Xinhua/Zhang Yuwei)

Tourists view pinwheels during a pinwheel fair held at the China National Children's Center in Beijing, capital of China, April 7, 2019. (Xinhua/Zhang Yuwei)

Tourists pose for photos during a pinwheel fair held at the China National Children's Center in Beijing, capital of China, April 7, 2019. (Xinhua/Zhang Yuwei)

Children play during a pinwheel fair held at the China National Children's Center in Beijing, capital of China, April 7, 2019. (Xinhua/Zhang Yuwei)