What is the content of ugly books against tradition?

So it's really hard to say about aesthetics. Every era has its own standards, and every era has its own differences and changes.

Therefore, sometimes, we may need to look at the diversity of calligraphy styles with a more open and inclusive attitude. What is not necessarily inconsistent with traditional aesthetics is ugly, vulgar and unacceptable, which implies a premise about artistic aesthetics. Find out what an ugly book is first, and then discuss the topic "why there are ugly books and they are very common"