You are married at the registry if you meet the following requirements in China:
a. In order to get married in China , the man shall not be younger than 22 years old and the woman shall not be younger than 20.

b. Either party is freewill and not a bigamist;

c. The two parties don’t have lineal relatives by blood or collateral relatives by blood up to the third degree of kinship;

d. Neither party is suffering from any disease that is regarded by medical science as rending a person unfit for marriage

e. If you will register to marry in Shanghai, the Chinese party should be Shanghai permanent resident and the two parties should go to the Shanghai marriage registration office in person to get registered and obtain the marriage certificate.