At the beginning of 2020, a sudden new coronavirus is sweeping across China. With the joint efforts of the Chinese people, the epidemic has been effectively controlled. However, up to now, the epidemic has appeared in dozens of countries around the world and has shown a growth tendency. People around the world are taking different measures to prevent and control the epidemic and prevent the epidemic from spreading. Here, we sincerely pray that this battle can be won at earliest, and make life and work return to the normal track!