old school
school one attended as a boy or girl （中小学的）母校. old school `tie (esp Brit)
1 tie worn by former pupils of a particular school （某中学的）校友领带.
2 (fig 比喻) symbol of excessive or sentimental loyalty to traditional values, ideas, etc （对传统价值观、 思想等极度忠诚的）守旧标志.