A tourist takes photos of orchids at the Beijing Botanic Garden in Beijing, capital of China, Jan. 23, 2017. (Xinhua/Li Mingfang)

Tourists visit an orchid exhibition at the Beijing Botanic Garden in Beijing, capital of China, Jan. 23, 2017. (Xinhua/Li Mingfang)

Tourists visit an orchid exhibition at the Beijing Botanic Garden in Beijing, capital of China, Jan. 23, 2017. (Xinhua/Li Mingfang)

Tourists visit an orchid exhibition at the Beijing Botanic Garden in Beijing, capital of China, Jan. 23, 2017. (Xinhua/Li Mingfang)