What does the icon of the watchlist means

1. The meaning is shown in the figure below:

2. How to add special attention？

2.1 Open App, long press a stock, the operation box will pop up. After clicking the Star icon, the watchlists will be displayed.

2.2 Computer client

Right-click the stocks, and the operation list will pop up, click "Set to special attention", and the watchlists list will be displayed.