The company has three branches, each of which has various corporate WeChat accounts. Now there is a requirement that members between the three branches need to communicate with each other.
At this time, you can use the external enterprise function of Enterprise WeChat.
First determine a headquarters, and then the headquarters invites branches to join the Internet enterprise.
1. Create a new Internet enterprise from the headquarters
2. The headquarters invites branches to join the Internet enterprise 
3. Branch companies can join by scanning the QR code
4. After the branch successfully scans the QR code, you can already see the branch’s folder. Both the headquarters and branches import shared departments and members. After importing, the user can be found directly in the external enterprise contact
5. After importing, the external corporate address book is still not found in the client. We need to publish the newly created external contact address book.
6. From now on, you can contact colleagues in the branch in the address book in the client.