Where is Chengdu social security ca certificate?

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.