@Robert ******
They open the doors at 6AM and at that time there are usually about 30 or so people in line. Then you queue up in front of the immigration office again until 7 and by the time they bring out the mobile queue ticket printer at 7 there are usually over 150-200 people in line.
Then we queue back up at 8 in the order of our queue tickets and get in the immigration doors at 8:30 in that order. Once you get inside is when you get the REAL queue ticket for your section