Just apply fot it from the China embassy or consulate near with the following documents:
1.Passport: Your valid passport must have at least six (6) months of remaining validity and at least one blank visa page in it.
2.Application form: One completed Visa Application Form.
3.Photo: one recent photo of 2x2 square inch (black & white or color is acceptable) glued or stapled on the application form.
4. Round-way air tickets and hotel booking in China.