Buying ukes in Shanghai

Hi folks -

I know a lot of ukes are made in China, but does anyone here have any knowledge or experience with places where you can buy a uke in Shanghai? I will be there for work in a couple of months, and it might be interesting, fun and inexpensive to pick up an instrument there.

I tried Googling, and the general suggestion was to go to a street lined with music stores, but was looking for more direct advice.

Thanks in advance.

If you'll be there in October, you won't want to miss this:
http://www.musicchina-expo.com/indexen.asp
It's like NAMM, but in Shanghai. I've been to it before. Tons of instruments, including ukes. Wholesale prices.
I'm currently in Thailand but will move back to China soon. I plan on going to this event again this year.