>>1754652Doesn't look like it.
It is surely based of German (like dimensions and probably overall design), but it is not re-built one. It is built from scratch as you see solutions that are unseen in older subway trains, like sharp corners of metal (as they were seen as stress-risers and were avoided).
Also it has switch mode motor control
https://youtu.be/Se0eZ3LjFZk?t=730 https://www.youtube.com/watch?v=JjXlKo2I66E (but still probably brushed motors as it makes 81-717 brushed motor noises, but wiki says PMSM which is a chink specialty as they are into permanent magnets)
Idk. It gives me 81-717 vibes (a later one with fiberglass interior), but with modern chink equipment and old german stock dimensions
