Dahon (domestic) is cheap there.
You can find a Dahon Dash for about $450 (usd).
There are also other brands making rather similar looking Dahon/Tern like folders like Fnhon, Crius, etc
Components vary, though imho, even things like microshift branded shifters are ok for general use.

If you don't need to use the bike to get on trains, I'd recommend a very plain looking non-folding bike.
At least it will be less likely stolen.

Take a look at Taobao (their version of Amazon) and you can get an idea on the prices of the stuff there.