Take Huawei children's watches as an example. The method of adding the address book to the phone watch is: 1. Click the watch button in the upper left corner of the APP page to enter the children's watch management menu, and click contact management. 2. Click Invite New Administrator, set the information of the invitee, and then click Invite. 3. Click on the invitation, send a short message to the invitee, and the invitee becomes the administrator. 4. Click Administrator to edit administrator information.