This is caused by association with a third-party application, and the solution is as follows:

1. First click the Weibo icon on the desktop to open Weibo, as shown in the figure below.

2. After entering Weibo, on the opened personal center page, click the Settings icon in the upper right corner of the page, as shown in the figure below.

3. Then click Privacy Settings in Settings, as shown in the figure below.

4. Then set the following "Who can I receive @ reminders from" as "People I care about", as shown in the figure below.

5. Now Weibo's automatic attention has been solved, as shown below.

Sina Weibo inexplicably pays attention to many people he doesn't know for the following reasons:

1, automatically assigned by the system;

2. The system recommended the relevant personnel, and confirmed it carelessly;

3. Sina Weibo account was stolen;