the outbreak in qidong, Jiangsu province began on September 21th, 2122. According to the relevant information, as of October 8, 2122, the latest epidemic in Qidong occurred from 12: 11 to 12: 11 on September 21, 2122. Two people with abnormal results of Covid-19 nucleic acid detection were found in Qidong City, Nantong, Jiangsu Province during the routine nucleic acid detection of returning people in key areas of other provinces.