By searching Yahoo-gle with ......

Here's one link:

http://www.china-driver-license.com/driving_in_china/the_motorcycles.html

In your situation, because you're registered with police in GZ, it is nigh on impossible to go the legit way because motorbikes are illegal in GZ. If you really want one you will have to "buy" one though a shonky operator. With no valid licence from waiguoland you will pay a hefty surcharge.

wechat: lisahong1   ph: 13902874789

Lisa organises licences in Haikou for foreigners. It costs about 12,000rmb plus a couple of days in Hainan. So I guess you could say you may get a little change out of 20k if you are lucky.

The government is getting wise to this and next year new laws will come into various cities in Guangdong (at least) saying that you need to do a test in the city in which you intend to drive to be legal. Applies to Chinese people too. So apart from the dubious legality/ethics of buying a licence there may be issues down the road. Who knows? Is it worth the chance of running foul of the authorities?

I wouldn't do it myself but if you are prepared for the possibility of trouble in the future......

why would you want to ride a motor bike in China? that seems like a good way to get killed.

http://www.mychinamoto.com/forums/showthread.php?1877-How-to-get-a-Chinese-Motorcycle-License

Probably you can't be issued with a license as most of Guangzhou has banned motorcycles. So you need to go to an edge of city area or somewhere else in Guangdong.