hi, i m pakistani and my wife too. i hold z visa. what documents i need to get my wife wid me?

Your wife should apply for a dependent work visa to stay with you with the followings:
1. Duly filled visa application form
2. Her pakistani passport
3. Original invitation from your employer in China
4. confirmation of invitation from the local foreign affairs
5. copy of your Chinese work visa and work permit
6. Physical examinication record
7. yoru marriage certificate
If it's her first time to China, local police character/clearance certificate attested by Ministry of Foreign Affairs of Paksitan is also requried.