I’m a student in China. I want to bring my wife to China? Which visa should she take?

You can try to apply for S1 Visa or S2 Visa; Documents include:
1.Passport
- Applicant's passport with blank pages and at least six months validity left.
2.Application Form
- One truthfully completed China S Visa Application Form attached with a recent color photo.
3.Invitation Letter from the Foreigner Who Works or Studies in China
- The letter should contain:
a. Information on the applicant (full name, gender, date of birth, etc.)
b. Information on the visit (purpose of visit, arrival and departure dates, address of intended residence, relations between the applicant and the inviting individual, financial source of living expenditure, etc.)
c. Information on the inviting individual (name, contact number, address, signature, etc.)

4. The Inviter's Passport and Chinese Residence Permit
- A photocopy of the inviting individual's passport and residence permit of China.

5. Kinship Certification between the Inviter and Invitee
- Original and a photocopy of certification such as a marriage certificate, birth certificate, certification of kinship issued by the Public Security Bureau, or other notarized certification of kinship showing their family relationship.