At the end of the Han Dynasty, it should be mentioned in the Custom Pass that "the book He Lv says: everyone will have an argument at the beginning of the month." It should help to refute the absurdity of this statement with facts: "According to the facts, Liu Junyang is a shepherd in Nanyang, who tasted the new moon and won the battle."
Later, when he arrived in the Three Kingdoms, Ren Wei and Zhang Qian once explained the cloud: "He Lv is the total name of heaven and earth." Yan Shigu quoted Ganquan Fu in the Biography of Yang Hanxiong, and Shan Li quoted the sentence of "Gan Yu" in Yang Xiong's Ganquan Fu in Selected Works. This statement is only slightly different from Xu Shen's interpretation of He Lv as the way of heaven and earth.
It is also meaningful to make a comprehensive survey of all the related words in Huainanzi, Ganquan Fu, Japanese Biography, Kan Yujin Compilation, Later Han Shu and Kan Yu mentioned by Zheng Xuan, Wang Chong and Ying Shao.
As far as we know, the definition of "Kanyu" is directly related to Feng Shui, which originated in Meng Kang and Ren Wei during the Three Kingdoms period. He once said, "Kan Yu, the name of God, is the creator of the book of painting houses." There is a sentence "Look at Yu" in Ganquan Fu in Yan Shigu's Notes on Xiong Zhuan.
Yan Shigu compared Zhang Yan's theory with Meng Kangzhi's and once commented: "So is Zhang Shuo". The source of Meng Kangzhi's theory is not detailed, but the textual research of Feng Shui books in the Han Dynasty does include Tu Zhai Shu or Tu Zhai Shu, which is quoted from Wang Chong's Lun Heng Qian Shu pian. With reference to the detailed textual research of Lv Cai and Jia in the Tang Dynasty, it can be seen that Meng Kangzhi's theory is faithful to the words of scholars in the Han Dynasty and is definitely not invented by Meng Kang out of thin air.
According to Lv Cai Biography of Old Tang Dynasty, in the early Tang Dynasty, Lu published and collated Feng Shui books handed down from generation to generation according to the orders of the Tang Dynasty, so as to "get rid of its vulgarity and save its use".
Lu Cai also used allusions to vindicate all kinds of Feng Shui books and criticized those books that were false, boring and unreasonable. His narrative "Family Classics" said: "As for modern wizards, there are even five surnames." People who say the five surnames of Gong, Shang, Jiao, Zheng and Yu all know what they belong to and act accordingly. However, there is no such thing as "experience in classics"; There is no such language in yin and yang books; This is a crazy word of mouth, but it's nothing; Only according to the Book of Kamen Yu, Huangdi said that he had five surnames for Tian Lao, and gave an example to prove that the five surnames said, "Things are not ancient, but righteousness is eccentric."
Lu Cai's so-called theory of five surnames, that is, the theory of five-tone surnames and interest, originated from the Ku Yu Jing, and Wang Chong's Lun Heng Qian Shu Pian in the Eastern Han Dynasty violently criticized this theory in Tu Zhai Shu at that time. According to Wang Chongyin; "Tu Zhai Shu" said: Among the eight skills in the house, the name of Liu Jiazhi is the first. The first place is different from the palace merchants. There are five family names and five family names. It is inappropriate for a family to have its surname, which is similar to that of a thief (according to the evidence: thief, that is, gram) to measure illness, death, crime and disaster. "He also quoted:" Art of the Painting Academy "as saying: Merchants should not face south, and purchasers should not face north. Then business gold, south fire also; Fire and water in the north; Water is better than fire, fire steals gold, and the five elements of qi are incompatible. Therefore, the house of five surnames has a square door, the right direction and wealth; Lose its suitability, poverty and decay "and so on. It can be seen that the Kanyu Classic in the Tang Dynasty is a continuation of the Tuzhai Book in the Han Dynasty, which is very obvious.
In addition to Lv Cai, Jia in the Tang Dynasty neglected the annotation of Zheng Xuan's Zhou Li in the Eastern Han Dynasty. It is said that before the Han Dynasty, there was a lost book "Kanyu Book", and later generations wrote it. There was a saying that "when the Yellow Emperor was ancient, Kan Yu died, so his book died". Zheng Xuan also noted that "the meeting of heaven and earth, the day of construction, the tired people", saying: "Building, built by bucket handle, is called Yang Jian, so the left is still in the sky; Tired, that is, once a day ago, that is, the yin sword, so the right is still in the sky. Therefore, there is an old saying of "He Lv Day": the first month is a holiday, and the sun is built in the shade and the shade is built in the promise. Where there is a sun, there is a sun, and where there is a sun, there is a sun. " I also quoted "Notes on Asking Dreams": "According to" Kanyu ",the Yellow Emperor asked about the old things in heaven: in April, Yang made it, and it was broken in the sea; Before the Yin was built, it was broken in decyl ... Today will be its legacy. According to "Kanyu", there are eight big meetings, and there are people in the small meeting. Through Jia Dui's introduction, we can know that the noble spirit is what Shang Zongzhan called "twelve Chen of architecture". The earth branches of the coordinates of the twelfth lunar month (Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai) are divided into twelve equal parts, and the direction of becoming symbols is opposite to the twelve times. There is a virtual "Tai Sui" cycle, and stars of the same age run in reverse according to twelve times; Bucket handle, the Big Dipper, refers to the Twelve Chen, which is called "Building, Eliminating, Full, Flat, Fixed, Holding, Breaking, Danger, Success, Closing, Opening and Closing" in sequence. The annex is based on the theory that the Twelve Chen will build and eliminate, which is referred to as "Building and Eliminating" for short. In addition, according to Jia Shu, Kan Yu, or as Meng Kang said, was the author of Tu Zhai Shu, who died when he was in the Yellow Emperor, but the etiquette of the Yellow Emperor was still very familiar with his technique, so every time the Yellow Emperor asked about the past, future generations made a living by this technique and wrote a book with its name "Kan Yu". Obviously, Lv Cai is a mythical figure created by the Kanyu family.
As a matter of fact, scholars in Kanyu's discussion on the good or ill luck of Japan with the combination of cadres and branches can be found as early as Wang Chong's Lun Heng Shu Jie and Nan Jian's Tu Zhai Shu. Among the six Jia Zhong, namely Jia Zi, Jia Yin, Chen Jia, Wu Jia, Shen Jia and JOE, "the house comes first", which not only focuses on its good or bad luck, but also has the method of building and demolishing. It is said that migration, building a house and getting married are not allowed to reach the traditional age, that is, to avoid the location and date of the underground branch, otherwise it will be fierce. Wang Chong criticized all these theories without mercy, just as he criticized Kanyujia's five-tone Lee theory. However, the astrologers cited by Wang Chong claimed that their theories all "decided good or bad from heaven and earth" and "from the images of the five elements".