Comment by m4rtink

Prusa wrote an article about that:

https://www.josefprusa.com/articles/open-hardware-in-3d-prin...

In short, these Chinese companies are pushed by the state, in essentially massive dumping. And not only that, they get Chinese hardware patents granted on open inventions from the wider 3D printing community as their own creation & then try to push those spurious patents also in the West.