Hello, please first verify whether the enterprise has advanced certification: 1) New user/uncertified enterprise: after the registration is nailed, create an organization, import the address book, and complete the advanced certification of the enterprise; 2) Nailing organization has been established and advanced certification has been completed; Please ask the enterprise administrator to open the nail and scan the QR code as shown below. Open the nail, click "Sweep" in the "+"in the upper right corner of the "Message" interface, and scan the QR code of the platform entrance below to join the platform, as shown below: