Why was A Dream of Red Mansions banned in Qing Dynasty, and it was an anti-book?

A Dream of Red Mansions is one of China's four classical novels and a cultural treasure of China's classical literature. However, such literary masterpieces were regarded as banned books in the Qing Dynasty. The Qing Dynasty was the darkest dynasty in China's long history. The rulers of the Manchu Dynasty were the most sophisticated and cruel rulers in history. They not only suppressed resistance and ruled the country by force, but also tried their best to stifle ideas, culture and enslave the people from the aspect of "civil affairs" Daxing Wenzi Prison is a cultural catastrophe that comprehensively examines all ancient books and destroys a large number of tampered ones through Sikuquanshu. On the surface, Sikuquanshu is about developing culture, but in fact it is about tampering, burning, destroying and gouging out ancient books, and the most insidious thing is to delete the original contents of ancient books. As a result, the vast China is a sea of people, and scholars can only drill into the ancient papers such as Confucian classics, exegetics, Oracle Bone Inscriptions and elementary schools to do some tedious textual research. Then, some mediocre writers appeared and managed to fill the hall with their own mediocre framework (the premise of filling it is to knock it open to match its poor writing framework). Since then, eighty volumes of The Story of the Stone, which was regarded as a forbidden book by the rulers of the Qing Dynasty, have gradually disappeared.