We need to make attestation of our renewal of China branch office, so for that we need to show our India office certificate attested by China Embassy but before need make notary and attested 1st from the Ministry of external affairs MEA department then go to china embassy, but they not do atested on the copy of certificate, only on stamp paper, so will it ve valid in china? Or in this case China embassy will sign on the copy or on stamp paper?

Pls suggest as we dont have much knowledge about this.