People visit the Holland Garden at the Beijing International Horticultural Exhibition in Beijing, capital of China, June 17, 2019. The Holland National Day event kicked off here on Monday. (Xinhua/Zhang Chenlin)

A band performs at the Holland Garden at the Beijing International Horticultural Exhibition in Beijing, capital of China, June 17, 2019. The Holland National Day event kicked off here on Monday. (Xinhua/Zhang Chenlin)

People visit the Holland Garden at the Beijing International Horticultural Exhibition in Beijing, capital of China, June 17, 2019. The Holland National Day event kicked off here on Monday. (Xinhua/Zhang Chenlin)