Are all the books of Zhonghua Book Company traditional?

Not all of them are traditional, but many ancient books are traditional vertical editions, such as Classic Series of the Book of Changes, Collected Works of New Editors and Scholars, Notes on Historical Materials of Tang and Song Dynasties and Classics of China Literature Studies. However, Learning Chinese Studies from Masters and All-round Annotations and All-round Translation Series of China Classics are simplified Chinese versions, and many large publications are also simplified Chinese versions.