I think your girl friend can a china visa to China.

Hi, thanks for your reply.
What do she need to provide and what do I need to send her for the visa please?
I know she needs an invitation letter from me and my address where she'll stay. I'll pay for her while she's here from my salary. Are there any other things I need to provide fer her?

She need to prepare the following documents for the China visa application:
1.Applicant's passport with blank pages and at least 6 months validity left before expiration.
2.A truly and completely filled application form affixed with one passport-sized photo.
3. Round-trip air ticket
4. invitation letter from you.
You should write in your letter that you will afford her eexpense in China besides your valid address, contacts and copy of your residence permit in China, and the letter should be stamped by the local public security bureau.