China News Service, Dalian, July 31 (Reporter Yang Yi) On July 31, Meng Jun, deputy director of the Dalian Center for Disease Control and Prevention, said at a press conference on epidemic prevention and control held by the local government that Dalian City was the earliest on July 22 People infected with the new coronary pneumonia were reported, and after close contacts were checked, more asymptomatic infections were found after a national nucleic acid test. Subsequent new confirmed cases were all transformed from asymptomatic infections, and the outbreak was detected earlier. Analyze the onset time of confirmed cases with self-reported clinical manifestations. The onset began on July 9 at the earliest, and the number of infected persons reported on July 24 reached a peak. After that, the number of daily reports showed a downward trend. Due to the progress of screening, there were no related cases. Increase, but the overall situation tends to stabilize.