Night ticket is 90 RMB. If you are 60 or above, the full day ticket is 100 RMB. The 3-day and 7-day tickets seem to be in short supply and not sold at the Expo ticket booths. Don't expect to visit the major pavilions if you can't get to the Expo by 8:30 AM to get the "appointment" tickets, the place can be crowded with 400K visitors and long queues of 3 hours. I've heard of 9 hours waiting time with a serpentine line that is 4 KM long.