I'm really hoping the doggo is also a thing to balance things out

Makes sense, interesting to see how that evolved into the Western "catty" meaning carrier.

I saw an item on Amazon where the pictures of the packaging had several different weights given in catties, including of a person, all in English though. I thought it might have been a mistranslation or something until I found the Wikipedia article. Unfortunately, I still don’t quite know how much the item weighs because I don’t know which catty the package was using (if I had to guess, probably mainland China).

If it’s mainland China then a catty is 1.1 pounds.

If you want strange units of measure try this. https://www.youtube.com/watch?v=r7x-RGfd0Yk&t=14s

And when your are finished look up liquid measure esp. those used in the wine industry.

Or exactly 500 grams