Windows 7 in Chuwi Herobook

Hi guys,
I have owned the Chuwi Herobook for a few years, and I need a secondary laptop to install the various car tools and these run on Windows 7
Currently my laptop has Windows 11 super lite installed, previously the original system downloaded from this forum.

Can you help me reset my PC and install Windows 7?
I tried via USB, Rufus etc, various ISOs but without success.

what is the problem? what should I do? A guide would be of great help, perhaps someone has already taken these steps

Could you please tell me your Serial Number.? But i dont think we have windows 7 for this laptop. as is quite old OS. I will check

This can help?