A staff member lectures on botanical knowledge via livestreaming on a mobile phone at the Botanical Garden of the Chinese Academy of Sciences in Wuhan, central China's Hubei Province, April 13, 2020. Amid the COVID-19 outbreak, the garden has been promoting "cloud tour" via livestreaming and short videos, making it possible for people to enjoy the spring scenery and learn about botanical knowledge. (Photo by Ke Hao/Xinhua)

A staff member lectures on botanical knowledge via livestreaming on a mobile phone at the Botanical Garden of the Chinese Academy of Sciences in Wuhan, central China's Hubei Province, April 13, 2020. Amid the COVID-19 outbreak, the garden has been promoting "cloud tour" via livestreaming and short videos, making it possible for people to enjoy the spring scenery and learn about botanical knowledge. (Photo by Ke Hao/Xinhua)

A staff member lectures on botanical knowledge via livestreaming on a mobile phone at the Botanical Garden of the Chinese Academy of Sciences in Wuhan, central China's Hubei Province, April 13, 2020. Amid the COVID-19 outbreak, the garden has been promoting "cloud tour" via livestreaming and short videos, making it possible for people to enjoy the spring scenery and learn about botanical knowledge. (Photo by Ke Hao/Xinhua)