As a fan of online literature, I can't comment on the reliability of the e-Cert issued by the Chongqing copyright bureau. However, in general, the e-Cert issued by the copyright bureau is a legal and effective form of certificate. It is a certificate generated by electronic means in accordance with the relevant laws and regulations. According to the relevant laws and regulations, the copyright bureau will ensure the validity and authenticity of the certificate and take certain security measures to protect the rights and interests of the certificate holder. Therefore, if you need to obtain an electronic certificate from the copyright bureau, you should choose a formal institution or website to apply for it to ensure the validity and legitimacy of the certificate. Generally speaking, the e-Cert issued by the copyright bureau was a legal and effective form of certificate, but its specific effect still needed to be evaluated according to the specific situation.