A photo taken on March 22, 2019, shows a view of the China pavilion in the Beijing World Horticultural Expo venue. The expo, to be held in Beijing's Yanqing district from April 29 to Oct 7, is expected to receive 16 million visits from people around the world. (Photos: IC)

A photo taken on March 22, 2019, shows the international pavilion in the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows the international pavilion in the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows a view of the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows a view of the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows a view of the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows a view of the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows a view of the Beijing World Horticultural Expo venue.

A photo taken on March 22, 2019, shows a view of the Beijing World Horticultural Expo venue.