There are many comic book shops in Zhengzhou Book City (it seems to be at the intersection of Longhai Road and Funiu Road, the original sweater world), which sell all kinds of genuine comics, not only Conan, Death Note and Dragon Ball, but also genuine ones. And they're all 20% off.
In fact, walking down the street, many comic book shops now have genuine copies, which are really not available in the book shopping center.