I assume you're referring to China, since "Asia" is a big and diverse place.
The Chinese use elimination training, or "potty on demand." You place the kid over the potty, make a specific sound they associate with going potty (you created the association previously) and they go. You then repeat this enough times in a day to eliminate the need for diapers.
I don't think elimination training is potty training. In potty training you're teaching the kid to tell YOU when they need to go, in elimination you are telling THEM when to go. Plus in potty training they're doing "active holding" whereas in elimination you're aiming for things to never get to that stage by going "potty on demand" enough throughout a day.
I think elimination training is very interesting and some parents have had great success mixing elimination with diapers to reduce the amount of accidents/cost. But even if they're trained on the elimination technique, they'd still need to be potty trained later, it just might be easier (since, again, you're asking them to tell you, rather than you tell them).