Xiaobaitu, please help-Marriage Certificate

Hello: Xiaobaitu,

We are waiting to file employement based I-485.

We have orginial marriage certificate from Beijing and notarized photo copy and english translation by US Notary Public in US.

We also have medical birth certificate for my son from Beijing hospital, and notarized photo copy and english translation by US notary public in US.

Question:

Do we need to do notary in China again for both the marriage certificate and my son's birth certificate for I-485?

Thanks a lot and have a nice weekend.

Laobuzi