The ad in the subway. A round trip ticket to China is only 385 GBP. An annual pass for underground within zone 1 and 2 would cost me more than 800 GBP. That's more than 2 round trip tickets to China!! I comfort myself in the way that everyday when I take the train, I think it as if I am flying back home little by little. By the end of the year, I would have gone back home twice. It makes me feel much better! Very A-Q, isn't it? :P