The Display APP (Standard Edition) is set to auto-start by default (using both default launcher and reboot monitoring methods). Some app stores do not allow the auto-start version to be listed; if you did not download from the official website, you can try downloading and reinstalling the standard edition directly from the official site.
However, most TVs restrict third-party apps from auto-starting on boot to improve user experience. Additionally, pressing the power button on the remote usually puts the TV into standby mode; turning it back on is considered waking up, not a full reboot, so auto-start may not work in this case. To achieve auto-start in all scenarios, you need to set the Display APP as the default desktop (Launcher).
To achieve stable auto-start on boot, we recommend communicating with TV or advertising machine manufacturers to directly set CXPlayer as the auto-start application. We also have cooperative relationships with various TV manufacturers, and you are welcome to consult customer service for introductions.
The following methods are summarized by some netizens and are for learning and research purposes only.
You can set the Player APP as the desktop (Launcher) to achieve auto-start on boot. First, make sure the CXPlayer app is installed. The following example uses a TV box, but the same operation applies to TVs or dedicated Android development boards.
- Use the ADB tool to connect to the box ADB is part of the Android development toolkit. If you have installed Android Studio, it will be included. You can also install it separately.
The official installation page is https://developer.android.google.cn/studio/releases/platform-tools?hl=en
Download and extract the appropriate platform.
Save the extracted directory to a specified location according to your usage habits, and then add it to the environment variable path to execute it in CMD. 
After installation, execute in PowerShell or CMD:
❯ adb
Android Debug Bridge version 1.0.41
Version 31.0.3-7562133
Installed as D:\software\Coding\platform-tools\adb.exe
...omitted
This indicates that adb has been installed.
With adb, you can install, delete, and freeze apps on Android devices in the same local area network. For detailed instructions, see using computer ADB commands to operate the TV box.
Next, we will use adb to install a third-party desktop on the Xiaomi box.
Before installation, you need to know the IP of the TV box. In the Xiaomi box settings > Network > Wireless Network, find the network information: 
The IPV4 address is the IP address we will use later. Here it is 192.168.1.7.
Additionally, for security reasons, ADB connection is disabled by default on Android devices, so we need to enable the ADB connection option on the TV box. Here, we take the Xiaomi box 4S as an example. 
In the Xiaomi box settings > Product Model, press the OK button (the middle button of the direction keys) on the remote control five times in a row, and a prompt message will appear indicating that developer mode is enabled.
Then, in Settings > Account and Security, change the ADB debugging option to allow.
Now you can use adb to connect to the TV box in the command line: