This was bought from Yintal and has Weidi on the doors. It's a one piece TTO with tons of bling.
It's very cheaply manufactured (and priced) and was very rough and scratchy when I received it, so I pulled it apart and greased up the moving parts. It's now a lot better now.
I'm pretty sure that its only supposed to have three positions because there is " -  •  + " on the adjuster dial and an arrow on the fixed section above it. There are no notches to denote the positions and with all that bling it would be very difficult to see any numbering.
There was a bit of blade mis-alignment on the one side which should not have caused any issues while shaving. I dismantled it and gently tapped the misaligned part with a nylon hammer whicg solved the problem.
If you are in the market for a cheap adjustable, one piece razor, this is probably as cheap as it gets.

Other brands that I've seen: Razorock Adjust, Baili DE15, Italian Barber.

How does it shave?
I've used it once and in a blonde moment, I forgot to make a note.
The head design very flat and it should be a reasonable shaver.
WATCH THIS SPACE.