We're supposed to check in at the Air China's counter 30 minutes before take-off , Joe .   Yes , I know . The boarding time on the ticket says 17:05 , and now it's 16:15 . I guess we have plenty of time .   Do we need to show our ID cards when checking in ?   Yes.It ' s essential .   What about our luggage ?   We can check it and hand carry the small bags . And we have to open each for inspection .   Are they going to frisk all the passengers ? 