In this work, we revisited the Raman spectra of NPCs and NPGs with aids of TPD, XRD, and nitrogen physisorption analysis. Both NPCs and NPGs mainly consisted of single-layer graphene sheet, whose major surface defects were single vacancies and grain boundaries. SW defects were also observed in all of them. The mean density of vacancy defects per hexagon in the graphene framework was 10 -2 for NPCs and 10 -3 -10 -4 for NPGs, validating their chemical and electrochemical stability. Surface defect healing will be the basis for controlling and understanding the structure of new NPG analogues in future.