China News Service, Beijing, April 22 (Xu Jing) From 16:00 to 22:00 on April 22, Beijing added 4 new cases of local new coronary pneumonia virus infection, all of which were confirmed cases. Among them, there are 2 cases in Chaoyang District and 2 cases in Shunyi District; there are 1 case of nucleic acid review positive person and 9 cases of nucleic acid preliminary screening positive person.