riding without chinese driving license
Of course you can buy a bike in china and ride around without driving license freely - as long as everything is going well (no accidents or being stopped at checkpoints).
I know somebody who did that with a car and had an accident where a pedestrian was killed. They put him behind bars for some weeks. The embassy finally got him out but he was under house arrest for while in the capital. It had cost him a lot of money and his job.
My recommendation: do it legally - it is possible.
see you on, or better off-road