Apple Siri Help ​

Open your iPhone and scan the QR code, Or access the connection ：Shortcut

Then click Get Shortcut, as shown in the figure after the addition is completed:

Replace your url with the control device link generated in the background. If you don't know what the control device link is, please see the documentation

Then, you need to modify the name of the shortcut command. Assuming that you shut down the computer, you can modify it to: Shut down the computer. After that, you can execute this command by saying "Hey Siri, shut down the computer!"