How does Xiaomi 9 set the desktop to display the twin city forecast?

The first step is to turn on the phone and click the location, as shown in the figure below:

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Step 2: After entering the desktop weather setting interface, you can see that the current location is different from the resident city, and the desktop displays the weather of two cities, as shown below:

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Step 3: Set up a resident city. If there is no resident city, you can add it manually, as shown below:

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Step 4: Click Add City to add a resident city, as shown in the following figure:

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Step 5: When the current location and the permanent location are different, the desktop will display the weather of the two cities, as shown in the following figure: