Ah, I see. Crazy how even the luxury cars are manufactured in China.

Nearly all of them sell longer versions of their cars in China.
Audi does not manufacture A4, A6 and A8 in China. They manufacture A4L, A6L and A8L. It is mentioned in their respective Wikipedia entries.
You’ll never see the standard A4, A6 or A8 on the roads in China, there’s no reason to import one – it is more expensive than the comparable longer local version which is roomier and better ride quality.

I see, I was wondering what the difference would be. Thank you for that clarification!

The shorter wheelbease versions are specific to the European markets whereas the long wheelbase models are sold in South Korean domestic as well as international markets.

Koreans and Chinese like their cars longer, as in large rear leg room.