Help identifying 20cm cotton dolls, but in plastic/resin?

I was at Tokyo iDoll last weekend, and I kept seeing these adorable chibi-style dolls that are the same scale/shape as Kpop cotton dolls, but it was a little jointed doll! I tried to go back to one I saw to ask what it was, but the owner had packed up by the time I went back. Does anyone know what they are? They were bigger than a blind-box chibi-style doll, it was fully the same size as my 20cm cotton dolls.

 

Thank you for any help!

Did the dolls by any chance look similar to this?

These and similar dolls have been making the rounds recently but I'm not sure of the best place to buy them or which one is the legit version. They mostly seem to be called 'Yun Dajiao' dolls on AliExpress.

Searching for 'yundajiao doll' (without the space) seems to be your best bet for getting other pictures but provides no solid leads on where to buy them.