1. Download and install mobile phone watch apps, such as Little Genius mobile phone watch app2 and Huawei children's watch app3. Then use the mobile phone to scan the QR code on the watch and bind the watch to the mobile phone.

2. Log in to WeChat account on your mobile phone, and turn on the options of "Allow strangers to add me as friends" and "Allow me to be searched by mobile phone number" in the settings.

3. Open WeChat on your watch, click the icon in the upper left corner, select "Add Friends", and then add friends in the following ways.

4. Scan QR code: Scan the QR code displayed on the watch screen with mobile phone WeChat, initiate adding Friend Request, and make an appointment on the watch or mobile phone.

5. Shake it: Shake it at the same time with other watches that support WeChat, and add friends according to the instructions.

6. Search for micro-signal: enter the other party's mobile phone number or micro-signal, click Search, and then click Add Friend. After the other party agrees, you can add WeChat friends.