Why do experts and scholars in the four classical novels like the Red Chamber and what is its literary value?

A Dream of Red Mansions represents the highest realm of classical novels, not only because it has unsolved mysteries, but also because it is an encyclopedia (the book covers literature, clothing, diet, pharmacology, tourism, history and folk customs, which can be said to be all-encompassing). As for its literary value, I have some humble opinions after reading A Dream of Red Mansions, which can be used for reference:

The first is poetry and articles. The fifth chapter focuses on the essence of poetry, the evaluation of the twelve golden women, and the songs that hint at the ending of some main characters, all of which condense the author's hard work. There are also Lin Daiyu's Poems of Burying Flowers, specifically Cao Xueqin's Poems of Burying Flowers ... As long as you look at them, you will find that any praise for these words is pale.

Followed by descriptive techniques and descriptive skills. The story in the book is so complicated, what kind of artistic techniques can be used to run through it? The answer is "foreshadowing", and to put it bluntly, it is "hint". As Zhifu said, "grass and snake are gray, and the pulse is thousands of miles away." The main line is of course the love tragedy between Lin Daiyu and Jia Baoyu. Let's talk about basic skills again. Cao Xueqin's brief description of Lin Daiyu (and Jia Baoyu, Wang Xifeng and others) is unparalleled in ancient and modern times. We don't have to doubt Cao Xueqin's writing style.

Finally, the influence of the red chamber. Baodai's pure but tragic love has made many people die. I think it is sadder and more shocking than Shakespeare's Romeo and Juliet. Cao Xueqin was poor all his life, "porridge and wine are often credited to the whole family"; Ironically, those scholars who study the Red Mansion have made great achievements and made a lot of money, and they will not worry about it in their next life. How many people get the feeling of "prosperity and decline" from it, and how many people can't put it down and learn to write from Cao Gong, …

Time doesn't allow, so I have to shut up.