The ca certificate shall be handled by the tax authorities. The parties bring a copy of the business license (photocopy), a copy of the tax registration certificate (stamped with the official seal of the unit) and a USB flash drive to the window of the local tax hall to apply for downloading. Taxpayers have the responsibility to keep the user name and password of the download certificate confidential. After the first successful login, please modify the download password yourself and remember the password.

Legal objectivity:

Article 13 of the Electronic Signature Law of People's Republic of China (PRC) shall be regarded as a reliable electronic signature if the electronic signature meets the following conditions at the same time: (1) When the electronic signature is used for electronic signature, it belongs exclusively to the electronic signatory; (2) When signing, the electronic signature production data is only controlled by the electronic signer; (3) Any changes to the electronic signature after signature can be found; (4) Any changes to the content and form of the data message after signature can be found.