The "Yang Guo" stem means that it passed through COVID-19, and the nucleic acid test result was positive. The meaning of "Yang Kang" is self-evident-COVID-19 has recovered and recovered. Some experts said that the peak of infection will come in a month or so, and medical staff should be prepared to be infected with Omicron before the arrival. He is here, and so are they. They have no symptoms and have never been positive. If you must know their names, I will tell you loudly that they are plain guerrillas and their names are all Li Xiangyang.