How to evaluate that Jiang Kui's secular essays should be based on equality?

Southern Song Dynasty Jiang Kui's "Continued Book, Spectrum? The "True Classics" said: "The true Classics take righteousness as goodness, and this secular theory is also the loss of the Tang people. The beauty of true books in ancient and modern times is no less than that of Zhong Yuan, followed by Wang Yi. Today, the books in both schools are chic, so why not? In the Tang dynasty, books were judged by books, and literati wrote books by words, which was a habit of imperial examination. Yan's Manna Book is his proof. Qing Europe, Yu, Yan and Liu looked at each other, so they should stick to the rules when writing in the Tang Dynasty, without the elegance of Wei and Jin Dynasties. And the length, size, skew and density of words are naturally uneven, so who can tell? It refers to the length of the word' East', the short of the word' West', the small of the word' Mouth', the large of the word' Style', the oblique of the word' Friends', the correctness of the word' Party', the sparseness of the word' Thousand', the dense of the word' Wan', the painting is more, the fat is less, and the calligraphy in Wei and Jin Dynasties is higher. Or, like the founder, interested in Europe and Yan Ji; Or simply average things and specialize in danger and eternity. Or the body must be slightly flat, so it is natural to stand upright, which is another disease of Xu Huiji. Or if the clouds are about to disperse, it will be good. There is a wind of respect from the prince, which is enough to make calligraphy beautiful. There are eight ways to use a pen in a real book. I tried to use the words of the ancients and made a picture. Now let me briefly talk about their meaning: the eyebrows of dots and characters are all based on the spirit of looking around, with a direction and a back, following the shape of the characters. People who draw straight, the body and bones of the word, want it to be firm and uniform, with a stop, a suitable length and a solid end. J righteous people, the hands and feet of the word, have various degrees of expansion and contraction, like the wings of fish and birds, with a smug look. Selector, the step of the word, I hope it is solid. Jin people are critical or inclined, or lead outward horizontally until Yan and Liu Weifeng are sharp and indecent. Turning, Fiona Fang's method, really uses folding, and grass uses turning. If you want to stay less, you will be strong; If you want to change your mind, you won't be depressed. But, you know, the grass is turning and the grass is staying. If the needle is hanging, the pen wants to be extremely positive, from top to bottom. If the rope is pulled at the end, it is called hanging if it is hung or shrunk. Therefore, Zhai Boshou asked the old man, "What about calligraphy?" ? , Mi Laoyue? Nothing hangs down, nothing shrinks, nothing disappears. This must be done to the extreme, and then it can be done. The ancients left ink and got their small paintings, all of which were unique because of their exquisite brushwork. Since the big order, we have lost more pens. Between words, the length complements each other, and the inclination and thinness are mixed, so as to be attractive to adults. As for today, it is particularly important. "

Note: Although this theory is suspected of being a teacher of the past, it also has some truth. According to Guan Yu, "the true state of every word" is the reason for the high calligraphy in Wei and Jin Dynasties. After the Tang Dynasty, I took part in it privately, seeking for founder and unified writing. Needless to say, it backfired, but I can't find it. Zhao Mengfu's calligraphy has been criticized, why ~