Torting for a long time, finally found me!
The method of the "Recycle Bin" icon for deleting the desktop is basically using regedit to manually modify the registry.
However, I found the way to use the ready-made tool to modify:
http://wy.cnii.com.cn/20040315/ca246188.htm
Using Group Policy Modifiers: gpedit.msc (GP should be Group Policy).
