According to the relevant information of smart home, the qq expansion bar is opened as follows:

1. Open qq, click the avatar in the upper right corner, and then click the personal avatar.

2. Click More in the upper right corner and click Information Card Settings.

3. Click Data Display Settings on the Settings page.

4. Turn on the switch to the right of expanding data at the bottom of data display settings.

QQ extension is the latest function of Tencent, which allows users to add strangers through matching chat and establish their own friends list.