Be sure to contact the office before you leave Taiwan if you plan to re-enter the country. It is necessary for the CLC to submit an application to the Ministry of Education well in advance.
According to the regulation announced by the MOE in response to the pandemic, all holders of the Chinese learning Visas/ARCs are obligated to submit an application prior to their departure if they plan to re-enter the country. Any violation of this regulation might affect their chances of applying for new Visas or Visa extensions in the future.