If you come to China, I would strongly recommend that you use an established agency with a management presence in China. My suggestion would be either VOR Holdings or WASINC. I know VOR Holdings is filling B737 positions with Shanghai Airlines, and WASINC has many Chinese contracts as well. I would say both are considered the "gold standard" of crew leasing companies in China, if there is such a thing.
Register your details with one of those agencies, and start compiling your paperwork. You will have a very challenging adventure ahead of you, but the rewards are great if you make it through the process.
Best of luck -
Cretan