在省勞動廳和社會保障處辦理。
Please go to the Labour and Social Security Bureau in provincial capital.(The province is you want to work in).

需要準備:
You need to prepare some document, each of them you need to prepare two pieces. All of them you need to stamp.
1、《外國人就業(yè)登記表》兩份，蓋章。
The form named Employment Registration of Foreign Workers in China.(Click this link you can find this form).
2、用人單位申辦《外國人就業(yè)證》的申請函，蓋章。
The letter of application for transact employment permit in China.
3、體檢原件及復印件、批準證書、營業(yè)執(zhí)照。
The certificate of your physical check.Approval certificate and business license of your company.
4、《外國人就業(yè)許可證書》（正本）。
Your employment license.(Original and copy).
5、《勞動合同》原件及復印件。
Your Labor contract.(Original and copy).
6、護照及職業(yè)簽證的原件和復印件。
Your passport and your professional vi
sa(Z type of visa).
7、二寸照片3張。
Three pieces of 2 inches photos.