给出入境或学校单位打咨询电话前，先写下问题：我是什么签证、什么时候到期、要办什么、住在哪里、缺什么材料。
Before making a consultation call to immigration or a school, write down your questions: what type of visa you have, when it expires, what you want to do, where you live, and what documents you are missing.