Jet Lag

I visited Beijing just over a year ago and adapted to the huge time difference quickly for the first couple of days but then by my third night there, I was up all night long and could not sleep at all. Unfortunately, the same thing happened to me here and last night was just awful except I did finish a book I'd been reading. This afternoon, I napped for about three hours and now it's half past midnight and am fortunately starting to feel tired. I hope I don't end up just taking a few hour "nap" and then waking up.