Before February 20th, there was only Nankai University. Because college students basically go to school across provinces, starting school later is also to avoid the peak of people flow. As far as I know: the opening time of universities in the spring of 2022: Tianda is in February18; February 20, Tianjin University of Technology; Nankai university February13; February 27, Tianjin University of Science and Technology; Tianjin Urban Construction University February 20th; February 22nd, Tianjin University of Commerce; Tianjin University of Finance and Economics February 26; February 27th Tianjin Agricultural University.