it will be easier and cheaper for you to apply for the China visa from the China embassy in India.
You need the following documents if you apply in India:
1. A appropriately and authentically ful-filled visa application form.
2. your passport valid for at least six months with at least 2 blank visa pages.
3. One recent passport size photograph.
4. One Passport photocopy.
5. A letter of invitation from China
6. Covering letter from applicant's company or employer addressed to the visa office.