What I was trying to do was as in the attached picture. I did.
I have examined more than 50 e-commerce systems. They can't even come close to Hikashop
Hikashop's logic scenario is very, very good.
It would be nice if Hikashop made a selectable theme for the custom field section in future versions.
For example, for the custom field I created, it would be nice if I could simply type {product:color} or $this->color ... in the theme and change it.
It would be much nicer if this custom field theme could be chosen differently according to the category.