During the postgraduate period, you can't apply for the EEG certificate, because the entry requirements for the primary level examination are to participate in and graduate from the EEG professional training organized by the EEG and Neuroelectrophysiology Branch of China Anti-epilepsy Association, and to be engaged in EEG professional work for at least 1 year, or to be engaged in EEG professional work part-time for at least 2 years.