The train discount is the same only in winter and summer vacations. But if you travel, graduate students will lose a lot. Many scenic spots say "primary and secondary school students and undergraduates" can buy tickets at a discount with their student ID cards. But graduate students (or doctors) can only buy them at full price.

Student ID card is the identity certificate issued by the school to the students who have just obtained their school status, which is used to prove that the students are studying in the school and prove their identity. Generally, there will be a one-inch color or black-and-white photo of myself stamped with the school seal.