Why don't you google NDI (Shanghai)? I expect you'll be able to discover the e-mail address of that branch of NDI by doing so. Then you can contact the DOS there with ease.
Undoubtedly, Shanghai is a more westernised location than Wuhan. But bear in mind it may be more difficult to snag a teaching post there than it would be in the likes of Wuhan. However, if you succeed, you'll be able to meet loads and loads of foreigners there. And of course the night life there is far superior to that of other Chinese cities!