Le 7 novembre, Dezhou City, Shandong Province detected positive SARS-CoV-2 nucleic acid on the package of imported cold chain products. On November 8th, a new cold storage stevedore in Tianjin tested positive for nucleic acid, which was a confirmed case in COVID-19. On November 9th, an asymptomatic patient was added to Tianjin, who was a truck driver and went to …