There are also reputable employment agencies, my previous job is through them to find, is also a friend recommended, personal feeling is not bad, quite responsible. Because of this, I have kept their phone number for the past few years, but I don't know if the phone number has changed.
The address is at the west end of Xiangzimiao Street, turn right when you go in from Zhuzhu Gate, I think it's called Sun Temple Gate.
Tel: 88090405 Liu Manager 8727945
Name is CITIC Job Agency
Good luck!