i am nepali and i want to take my wife in china , i have work visa in china so what need to do?

Your wife needs to provide the following documents:
1. her passport
2. one passport photo
3. fill out visa application form V.2011A
4. marriage certificate, photocopy of the identity document and residence permit of you as her husband in China
5. an invitation letter written by yourself
6. Other additional documents required according to the merits of each applicant, e.g. bank statements, round-trip air tickets booking, etc.