During Windows operation, the key combination "Ctrl+C" can copy the information in the current active window to the clipboard.
 1. The shear plate is equivalent to an intermediate storage cabinet
 2. The content to be copied (text, pictures, multimedia, files, folders, etc.) is temporarily saved here after the "Copy" function is selected
 3. When the next "Paste" operation is performed, the operating system will copy the data saved in the clipboard and save it to the specified location. This is the principle of copy and paste.
 4. After the "Copy" function is executed next time, the data saved in the clipboard last time will be replaced by the newly copied content. If the "Copy" function has not been executed, the content copied for the first time will always exist in the clipboard before the shutdown, and will not be available after the shutdown, because the clipboard is only temporary.