How does Baidu map check whether there is rain or dark clouds somewhere?

Hello, I just learned to check the weather in a place a few days ago. Now I'd like to share it.

First, the first step is to download the map software, and then click the installation option indicated by the arrow below.

Second, the second step, after the installation is completed, click to open the map APP.

Third, the third step, after coming to the main page of Baidu map as shown in the figure below, click the route option indicated by the arrow below.

Fourthly, we can see the page shown in the figure below, and click the driving option indicated by the arrow below.

Step 5, on the route page, enter the destination.

Step 6: After coming to the navigation page, click the weather icon indicated by the arrow below, so that we can see the weather along the way.

Step 7, click the service area icon indicated by the arrow below, so that we can see the service area along the way.

When we search the weather, we can only find the weather of a certain city, county (district) and township (town), which can be presented.