cd C:\Program Files\Oracle\VirtualBox //installation directory

VBoxManage.exe setextradata centos VBoxInternal2/SharedFoldersEnableSymlinksCreate/wwwroot 1 //centos virtual machine name wwwroot shared folder name

VBoxManage getextradata centos enumerate //The test result is similar to the following side success

Key: GUI/LastCloseAction, Value: Shutdown

Key: GUI/LastNormalWindowPosition, Value: 539,208,800,651

Key: VBoxInternal2/SharedFoldersEnableSymlinksCreate/wwwroot, Value: 1

last step: Restart the virtual machine as an administrator