How does Xiaomi mobile phone add time to the desktop?

Xiaomi mobile phone adds time to the desktop:

Search and download "China Calendar" in "Baidu Mobile Guardian". After downloading, install "China Calendar";

After installing China Calendar, return to the phone desktop and hold down the screen.

Select "Widget" and click "Suitable Calendar";

After selection, you can select a "black" or "white" background and adjust the "transparency";

Finally, click the "tick" in the lower right corner, and the mobile phone desktop calendar will be set.