The subway of Tianjin West Railway Station can't reach the University of Technology. The subway of Polytechnic University is still in trial operation.

It will be opened in the second half of the year, so you can cancel the idea of going back to school by subway.

Take a bus from West Railway Station to Polytechnic, and then transfer.

You can also take the subway to Tianjin Railway Station first, and then take the bus back to school.