attestation of single certificate

I am from pakistan and want to get married with a chinese girl! I need to have an single/unmarried certificate attested from pakistan foreign affairs! i wanted to know that do i need to attest the same single certificate from chinese embassy in my country too so that i can get married in china? i have been informed by some people that i do need to attest it from chinese embassy but most of the people have told me that i donot need to! please let me know about this thing! and i also wanted to ask that if someone has already done it recently please share your experience! what are the steps to be taken after enterring china to get married there! please tell me as much details as possible! Regards!