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China is a bit of an exceptional case. Student exit visas require classes from the party strongly discouraging making too many local friends.

Source please?

Edit: I can't even ask for a reference without getting downvoted again and again. Nice.

Are you asking for a source that confirms that China requires students (and every other national) to have an exit visa to leave the country?

What? Do you mean the state sponsored student or student in general? There is no exit visa. And there is no classes.