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. (Photos: Xinhua)

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.

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.

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.

A visitor is seen 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.

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.