How to open the "weather forecast" function in the notification bar of IOS system?

The steps to open the "weather forecast" function in the notification bar of IOS system are as follows:

1. First, drop down the notification bar and slide the time to the right;

2. This page shows the system default (this is set by myself), and then click "Edit" in the circle below;

3. This is the page after entering. Find "Weather", click the "+"in front, and then click Finish. If necessary, you can add other applications at the same time.

4. You can check the weather information by dropping down the notification bar.