If you don't have a certificate, it is recommended to apply. People are generally required to have a certificate. Without a certificate, it is the black generation.
Registration conditions for the patent agent qualification examination: China citizens who meet the following conditions can register for the examination.
(1) has full capacity for civil conduct;
(2) Obtain a college degree or above in science and engineering recognized by the state, and obtain a diploma or degree certificate.
There are many patent agents in Sibo Forum. You can ask them for advice.