The OP was already in the taxi and the taxi seemingly left the stand before the OP was told 1000rmb. This isn't a 200rmb surcharge. The taxi could refuse to allow such a passenger to board, or refuse to drive till the passenger leaves the taxi, if he doesn't want to go out of the city. In which case the passenger can agree to pay over the meter to have the driver agree to travel. Under no circumstance can the driver take the passenger and then force him to pay a surcharge.

I am saying from personal experience that even if the driver agreed to a higher rate and he refuses to put on the meter he is most likely dangerous.

edit in bold.