That is the sort of thing a GW type might do IMO. And still illegal on any visa. Teaching stuck up and brainless Chinese "businessmen" for a living anyone? I don't think so! Once again, just get a job at a public high school or university if you want to work in China, it's that simple.

It's fun working illegally; sense of danger, sense of freedom.

The more brainless these stuck up businessmen are the better; and they will need double lessons; and at 300 yuan a time; and more of them to boot; and they will stay on your books longer; and, and, and, and......... to boot, to boot, to double boot. cheers&boots.