On the way to and from the Philippines, I will be laid over in Shanghai for 20 hours. Now wanting to make the most of it and not just using it as vacation time, I was wondering if there was any way to screen manufacturers and distributors before I get to China so I can get the most out of my layover? I have been on google maps, but that is not helping much. I would look on Alibaba, but I want to look outside Alibaba to see if there are any manufacturers that I could buy from. I was thinking worse comes to worse just go to the markets and figure it out from there, but I want to make the most of my mini trip. Any suggestions?