Visitors view orchids during the Orchid Show at the Chicago Botanic Garden in Glencoe of Illinois, the United States, on Feb. 27, 2020. The Orchid Show is held here from Feb. 8 to March 22. Photo:Xinhua

Visitors view orchids during the Orchid Show at the Chicago Botanic Garden in Glencoe of Illinois, the United States, on Feb. 27, 2020. The Orchid Show is held here from Feb. 8 to March 22. Photo:Xinhua

Visitors view orchids during the Orchid Show at the Chicago Botanic Garden in Glencoe of Illinois, the United States, on Feb. 27, 2020. The Orchid Show is held here from Feb. 8 to March 22. Photo:Xinhua

Visitors view orchids during the Orchid Show at the Chicago Botanic Garden in Glencoe of Illinois, the United States, on Feb. 27, 2020. The Orchid Show is held here from Feb. 8 to March 22. Photo:Xinhua