Can someone clarify how to switch from a private language school in Bangkok to a university in Chiang Mai? If the Extension of Stay based on ED is still valid, do I get a cancellation letter from the language school and go to the Bangkok immigration office? Can I cancel my study at the first school (in BKK) at Chiang Mai immigration? Then how quickly do I need to apply for the visa in Chiang Mai? I assume it is not possible to finish everything in BKK and CNX on the same day.