Ted, this is how you do it. Get yourself a multiple entry visa a few weeks before you 90 day expires. Easiest place would be to do this in Hong Kong which is only a couple hours away from Guangzhou. You can duck in and out of the country with no worries. By that time you should have a sponsor who can vouch for you and get started on a work visa or a permanent residency permit. Both allow you to work and live in China with no impedements. My first employer had my residency permit ready in three weeks, I'm good until February 11, 2010. Work visas are a little more difficult to get but if your ladie's company is tight with govt. officials your cool. Teaching jobs in Guangzhou are everywhere, pay is not as good as Shenzhen though. I've been here 6 months and teaching coming up on 5 months, great work and don't have to work like a slave to live comfortable. Here's my email if any questions or concerns
seal03@gmail.com, pm if you need my cell number. Maybe we can meet up, thinking about making a few trips to Guangzhou in August and maybe October.
China Shark Mike