回复：这样一走了之可以吗？

You can write to school asking them to keep the admission for another year because you have military service to finish. Most likely school will allow you to do so.

I don't think you should just leave, that could make you subject to military discipline same as violate the regular law. To my experience, you just have to find right Guanxi and be generous of gift-giving to people in power. But no matter what you do, your father will not be affected beside losing face if you end up be punished by military.