Mr.Jahangir alam, first, you should get an Invitation Letter from a qualified international travel agency in China. Then prepare the following documents:
1. Valid passport (at least six months before expiration) with blank visa pages and copy of the first three pages;

2. TYPED Visa Application Form with one passport photo.

3. Applicants who have never been to China before should submit in person.

4. six-month bank statement