No, according to the inquiry in official website, Hualv.com, it doesn't matter if you change dollars part-time, but you need to go to a bank approved by the State Administration of Foreign Exchange or a designated foreign exchange exchange point. Part-time job corresponds to full-time job, which means that employees or students hold other jobs besides their own jobs. It is also called a second occupation or sideline, and it can also be a transitional job during job-hopping.