The validity period of the digital certificate application begins at the end of the digital certificate period. It is suggested that certificates that have not been renewed during the renewal period can be re-registered in China declaration system. Users should apply to China for certificate renewal service before the certificate is valid. Materials to be carried in the replacement: the official seal of the company shall prevail. 2. The fee for updating the digital certificate shall be calculated in 90 yuan. 3. Original organization code certificate, social insurance registration certificate and business license (copy). 4.USBKEY digital certificate.