answer: Joe tells #Person1# they will show ID cards and check luggage when checking in at the air china's counter.
documents: #Person1#: We're supposed to check in at the air-china's counter. Thirty minutes before take off, Joe.
  #Person2#: Yes, I know. The boarding time on the ticket says 17 o'clock.'
  #Person1#: Do we need to show our ID cards when checking in.
  #Person2#: Yes, It's essential.
  #Person1#: What about our luggage?
  #Person2#: We can check it and hand carry small bags. And we have open each for inspection
  #Person1#: Are they going to frisk all the passengers?
  #Person2#: I think so. we certainly don't want a highjack to happen on our plane today.