Getting married to Chinese lady. How and what paper work is need.And were do we get the paper work.

You need to get the Single Status Certificate issued within recent three months time and legalized by FCO; Then take it to Chinese embassy or consulate in your place for Notarization (original copy, and a photocopy).
Beside, your birth certificate is required as well. For more details, you can refer to https://www.travelchinaguide.com/embassy/visa/marriage-registration.htm