A copy. Tianjin polytechnic university official website inquired that tianjin polytechnic university's enrollment batches in various provinces are generally undergraduate, and the school is a "double-class" construction university, so it is a book. Tianjin polytechnic university, referred to as "Tiangong University" for short, is a full-time ordinary higher education institution in Tianjin jointly founded by the Ministry of Education, Tianjin, the State Bureau of Science, Technology and Industry for National Defense and the Tianjin Municipal People's Government.