2009 is the time for admission.

75 is the department number (compiled by the school, 2 1 is the department of mathematics, and 75 is public health! I don't know the rest)

1 is the number of the professional representative under the department.

0 1 is the class number.

02 is the student number of the class to which the students belong, generally arranged in pinyin order!

It's for the train. It doesn't matter.

Just write the student number of our college, 200975 102 10 * * Department of Preventive Medicine, Health College. I have several such fake certificates, just to save time on the train.

Generally, I don't look at your college and student number, only at bus sections and train discount cards.