My wife is from a city of 7 million in China. Not only would you not have heard of it, most Chinese I've met also need some explanation of where it is.

I've traveled in China, and sometimes we just stop at some convenient roadside "village" for lunch, the kind of place that would have a Denny's and a gas station in the US. Except in China, the restaurant has five stories and it's bumper to bumper traffic outside. The population difference is really hard to get used to.