Resident Permit for Living with Fiance till 2 years

My Fiance is American Citizen and I am Pakistani. She is a teacher in a school of Beijing and she is on 2 years contract. Can I get resident permit for 2 years? I just want to live with her in China. We are already married in Pakistan last year. But America doesn't accept Pakistani marriage. America wants us to present in American court and sign on marriage papers. That's why She is still single according to U.S law. My Immigration case is still pending in Islamabad, Pakistan branch of U.S embassy since 2 years. I can't live without my love. Plz guide us what to do.