Especially if you're just going to the mainland. Beijing is so cheap and Shanghai is so easy to navigate and find work.
Seriously, just ask yourself what's the worst thing that can happen. For me, if it doesn't involve dismemberment, I'll do it. Other than that...
Then ask yourself what's the best thing that can happen.
You will find work no matter where you go. You will not fail, because there is no such thing as failing if you walk away with a good lesson learned and some experience under your belt. No decision lasts forever and if you don't like what you're doing, you can change your mind and come home.
What exactly are you afraid of?