==>>(if you are in NTU)If hall office is still open, go to them for help. they will ask for you matric card after they open the door.
If hall office is closed...umm...go to N2 B4(...cannot remember B3 or B4 liao :P, one level under printing room). Go to security division for help. They will tell you what to do.
Dun worry ^_^
她在翠园