On Tuesday, August 30th, primary and secondary schools in China started, and the roads were back to their usual scenes of cars, motorcycles, and traffic controllers at intersections, with people coming and going, and the traffic was bustling. With the start of the school year, the epidemic is not yet under control and is on the rise, so one can't help but worry about the possibility of having to go home and stay away for the rest of the vacation because someone in the classroom has been diagnosed. The epidemic has entered its third year, and with the popularization of the vaccine and increased awareness of the epidemic, every day is a time when we can see that the epidemic is still under control and is on the rise.