i have never been to YHZ, but i assume they have checkin kiosks. did you check in on the kiosk as soon as possible, then try to get the attention of one of the staff to verify your documents?
if so, and you checked in on the kiosk at least an hour - hour and a half in advance, you might have a beef. if you didnt, or you arrived less than an hour before an international flight, sorry but i think you are out of luck.