At least 18 years old. Tianjin University is a national key university directly under the Ministry of Education. Its predecessor was Beiyang University, which was founded in 1895. It is the first modern university in China. In the enrollment brochure, major: those who have graduation certificates from ordinary high schools, vocational high schools, secondary specialized schools and secondary vocational and technical schools or have equivalent academic qualifications must be at least 18 years old when registering. Junior college: graduated from junior college or above in national education series.