1. Open the camera application of the mobile phone and set it to the front camera mode. This can ensure that the screen picture of the mobile phone can be captured.

2. Aim the screen of the mobile phone at the mirror to ensure that the picture on the screen is reflected on the mirror.

3. Live the images on the mirror image in real time by using live broadcast software or applications on another device or computer. You can use the live broadcast function on YouTube, Twitch, FacebookLive and other platforms, or you can use special live broadcast software.

4. On the live broadcast software or platform, select the mirror window where the mobile phone is located as the live broadcast source and start the live broadcast.