Wechat scans the QR code to automatically send messages to friends and groups in my mobile phone. I got it.

Therefore, in order to prevent this from happening, it is best to close WeChat when it is synchronized with contacts.

If you have any important information, it's best to close it after synchronization is turned on.

How to use WeChat group assistant:

1. Log in to WeChat with your mobile phone and select Settings.

2. Find the function in the settings, and then click.

3. Click the function to see the group assistant options.

4. Click Start Mass Sending-New Mass Sending.

5. Select a friend to send a message, click the circle in front, and then click Next.

6. Enter the content to send in the red box, and then click Send.