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About bikes, I live in Shanghai (a flat city well prepared for bikes with roads devoted only to them) and I have found a bike which allows me to commute (subway) from side to side of the river and then ride the last mile quickly with the bike. It is http://www.bd21.com/shop/product.asp?id=435; It costs around 40 euros (400RMB), materials are not extremely good, but you can ride fast enough to get easily to work. I tried the non-foldable one (http://www.bd21.com/shop/product.asp?id=443) and it was also very useful. In both bikes you don't feel like they are small at all, I ride as fast as an average person which is not speeding. I have no relation with the company of whatsoever, I just thought people who search for foldable bikes in the internet might end up here and this bike is worth a try.