I AM GOING TO SFO VIA HONGKONG,WILL BE REACHING THERE AT 15.20 AT HONGKONG INTL AIRPORT BY CATHAY PACIFIC AIRLINE AND AGAIN MY NEXT DEP.TIME IS 00.30 AM IN THE NIGHT, IN BETWEEN I WANT TO SEE HONGKONG IF POSSIBLE WITHIN 3-4 HOURS SO THAT I MAY MANAGE THE IMMIGRATION AND Q TIMINING FOR CHECK IN ALSO.KINDLY ADVISE ME THE FACILITY AVAILABLE AND COSTING IF I USE AIRPORT EXPRESS TRAIN