1. Make sure that both ends of the same network cable are connected to the HDMI interface of Langlang Education Integrated Machine and the HDMI interface of the computer respectively.

2. Turn on the power of the all-in-one Langlang Education Machine and adjust it to the appropriate input source.

3. Press the Win+P key on the computer and select "Copy" or "Expand" mode.

4. If everything is all right, the computer screen should display the screen of the all-in-one computer of Langlang Education.