When my school cancels my Foreign Expat Certificate...Does that cancel my Visa?

Atticus, your Z type is not cancelled when your school cancels your Foreing Expert Certificate. However, if your school or the Human Resource and Social Security Bureau informed the cancelling of your FEC to the Exit and Entry Administration Office, it's possible that the office will cancel your Z type. Generally speaking, it's you who should go to the office to cancel the Z type or change it to the L type.