我给加航打电话,他说17岁以下国内航班不许需要任何document。我查了网站上, D. u& t e* m% u" x, N7 ? For travellers younger than 18, an original birth certificate or non-government issued ID (e.g. a student card) is suggested but not mandatory at this time, unless our Unaccompanied Minor service is used.