If the school is big and flat, you can buy one, but you can buy a second-hand one and a new one when you get to school. It's easy to lose it at school, and it's nice to lose a new one.
If your school is steep, such as Qingdao or Yantai, and there are steps everywhere, it is useless to buy it, hehe.
Life safety review article 1
Safety means responsibility. A person's safety is not only responsible for himself, but also for his family who care about you