I found a Chinese app that only uses adb devices to load the device list at the beginning.

Then it shows the device in real time, allowing you to control it as if you were manipulating it on a real phone. What technology did they use?
The android device shows up on the desktop app with almost 0 latency. So adb screencap is not feasible.
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I checked if they use adb, but it turns out they only use adb devices at the start.