Photo taken with a mobile phone shows flowers at the Beijing International Horticultural Exhibition in Beijing, capital of China, on June 3, 2019. (Photo: Xinhua)

Photo taken with a mobile phone shows a scene at the Beijing International Horticultural Exhibition in Beijing, capital of China, on June 3, 2019. (Photo: Xinhua)

Photo taken with a mobile phone shows a scene at the Beijing International Horticultural Exhibition in Beijing, capital of China, on June 3, 2019. (Photo: Xinhua)

Photo taken with a mobile phone shows a scene at the Beijing International Horticultural Exhibition in Beijing, capital of China, on June 3, 2019. (Photo: Xinhua)

Photo taken with a mobile phone shows a scene at the Beijing International Horticultural Exhibition in Beijing, capital of China, on June 3, 2019. (Photo: Xinhua)

Photo taken with a mobile phone shows a scene at the Beijing International Horticultural Exhibition in Beijing, capital of China, on June 3, 2019. (Photo: Xinhua)