Windows10 how to extract the built-in lock screen wallpaper

There are a lot of netizens who like Win10's built-in lock screen wallpapers. They feel very good and want to extract them and save them. So everyone knows where the paths to these wallpapers are? How do you extract them? Take a look at Xiaobian.
Win10 built-in lock screen wallpaper path:
Win10 10049 preview version and subsequent versions:
C:\\Users\\username\\appdata\\Local\\Packages\\Microsoft.Windows.ContentDeliveryManager_**** ****\\LocalState\\Assets\\
Before Win10 10049 Preview:
C:\\Users\\username\\appdata\\Local\\Packages\\Microsoft.ContentDeliveryManager_********\\LocalState \\Assets\\
Note: These wallpapers are all automatically downloaded from the Microsoft server by the Win10 system, so you will see that the files are not in the same time, and the wallpapers of different users are different.
But these wallpaper files in the Assets directory have no suffix name by default, only a long list of file names. Figure:

You need to add a .jpg suffix to these file names to display properly. You can add file suffixes in batches.
The method of adding file suffixes in batches is as follows:
First copy all the wallpaper files in Assets to a new location, such as the Wallpaper directory of the D drive.
Then run the command prompt as an administrator and enter the following command:
ren D:\\Wallpaper\\* *.jpg
Enter the command to add a .jpg suffix to all files in the Wallpaper directory. name. These wallpaper images will be displayed normally. As shown in the figure:

You will see that there are usually two wallpapers for each screen, one for horizontal screen desktop wallpaper with 1920*1080 resolution and one for vertical screen mobile phone with 1080*1920 resolution. wallpaper.
Well, after knowing the path of the lock screen wallpaper built into the Win10 system, you can extract them and save them, or as a background for other computers or mobile phones.