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There is a lot of problems with split-pants e.g. children now dribble.

It’s not all that big a leap either, there are plenty of gifs of Chinese parents utilizing split-pants to great effect.

[Fooloo]

Yes children dribble. Elimination communication helps you to not let that happen inside.

So why is this not a problem to the Chinese but you make sound like one?

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And what happens outside in the urban areas other people also happen to live in?

It evidently is a problem though considering the entire Chinese middle class seem to have switched en masse to disposables, turning China into the largest diaper market in the world over the past decade or so.