Soon to be married

Hi, i will be getting married on July. After the wedding, the church will give us a copy of the marriage contract signed by the priest and witnesses. Does the chinese consulate required an authenticated copy from NSO!?? Or will the marriage contract given to us after the marriage ceremony will suffice? I was thinking maybe I can just get a notarized certification stating that we are married since they only need a proof of kinship.

Can you confirm if that is enough. I have been to China twice visiting my fiancee with L type visa