Married certificate & birth certificate endorsement by Embassy.

Hi, i want to know, our expatriate staff nationality is America, married with China girl from Anhui. His baby nationality is America but born in China. Immigration Malaysia request to get the endorsement from Malaysia Embassy in China for their married certificate & his baby birth certificate for applying Dependent pass. All of them already in Malaysia now. Can advise us what to do?. Can we get the endorsement in China Embassy in Malaysia. Thank you.