The reporter learned from the Tianjin Epidemic Prevention and Control Headquarters that from 0:00 to 18:00 on May 22, the Tianjin disease control department reported 20 positive infections of the new coronavirus nucleic acid test, of which the control personnel screened and found 15 cases. Regional screening found 5 cases, all of which have been transferred to designated city hospitals. Among them, 4 are confirmed cases of new coronary pneumonia (mild), 5 are asymptomatic infections of the new coronavirus, and 11 have not yet been classified. (Reporters Guo Fangda and Zhang Jianxin)