I have heard different things about the BUS from Beijing Airport to Tianjin. I heard that the last bus leaves at 11 pm. Other sites say 10pm or 12am. I also heard that it actually leaves after the last flight of the night. I came in about two weeks ago and arrived around 11pm and after going thru customs etc remember sitting on the bus waiting for it to leave. We left when the next bus arrived. So I am wondering how accurate this is?