I think the Chinese were a little more developed than Japan because a lot of the stuff in Japan were inspired by China in the first place. And the Japanese people really don't like to change. So long as it still works, why change? The Chinese change around things a lot.

Oh, that! I know the Aichi website, but I haven't been there for ages. I must have missed the info about the nuts and things. I only saw the yuzuke XD