Anonymous ******************
@Daniel ******
The most correct answer is that you should be engaged in some sort of soft power activity upon each entry. It doesn’t have to be the same one but if you weren’t then you’d technically be violating the conditions of your visa.
That being said, currently people aren’t being asked for any proof of being enrolled in anything upon re-entry but no one knows how things will look in a month or 5 years from now.