"Elephant" is the "Qian" hexagram of "Zhou Yi", which says:
There are mountains in the earth, "Qian";The gentleman is more than the few, and the thing is even.This sentence is short, but it is extremely informative.
Let's elaborate. First, let's talk about "mountains in the earth".
The upper hexagram Kun is the earth, and the lower hexagram Gen is the mountain, and there is a mountain underground, but why does the author not say that "there are mountains underground", but that "there are mountains in the ground"?
Because "in the earth" can not only be underground, but more importantly, it means in the heaven and earth, which is a proper noun. In "Elephant", there is "under the mountain" and "under the world", but he never says "underground" but "in the ground", which shows that the author is very particular about the choice of words.
Zhou Li" records:
"In the earth, the place where heaven and earth meet, the place where the four seasons meet, the place where the wind and rain meet, and the place where the yang and yin meet, then all things are safe, and the kingdom is built. ”It was under the guidance of the principle of choosing "land" to build a kingdom that after the Zhou Dynasty destroyed the Shang, Luoyi was built in the place chosen by the Duke of Zhou, also known as "Tuzhong".
Shangshu. The Summons contains: "The king comes to God and submits himself to the earth." Note: "King Yan has come to live in Luoyi today, following the rule of heaven, bowing to himself and educating in the terrain. ”The method of Zhou Gong to choose the middle of the land is to rely on Tugui Shadow Measurement, and there are still the ruins of Zhou Gong Shadow Measurement Platform in Dengfeng Xucheng Town, Henan Province.
If you understand the location of "in the middle of the earth", then the mountain "in the middle of the earth" will come out
This mountain is not underground, but Songshan Mountain located in the middle of heaven and earth.
Songshan is called "Zhongyue", regarded as the heaven and earth, among the five mountains, the Zhou Gong test platform is not far from the foot of Songshan Dengfeng Xucheng Town, Zhou Gong built Luoyi is also less than 100 miles away from Songshan.
Therefore, the "mountains in the ground" mentioned in "Elephant" refer to Zhongyue Songshan Mountain in the ground.
Because Songshan is a famous mountain that lives in the ground, according to the record of "Rites", the ancient Son of Heaven had to hold the ceremony of "ascending to the sky" in Songshan.
Because the famous mountain rises in the sky, because the auspicious soil is in the suburbs. Ascend in the sky, and the phoenix descends, and the turtle and dragon are false;The emperor is in the suburbs, and the wind and rain festival. - Ritual VesselsFor the ceremony of "ascending to the sky because of the famous mountain", Zheng Xuan explained it like this:
"Name, Judas also;l, on also;, still into also. It is said that the patrol guards as far as Fang Yue, and the burnt wood sacrifice to the heavens is announced to the success of the princes. ”That is to say, such a famous mountain as Songshan is the mountain of success in Suetian, which is also the origin of the town of "Sucheng" at the foot of Songshan, and it is also the reason why Zhou Gong built a measuring platform in Sucheng Town.
The battle of King Wu to destroy Shang was won on Jiazi Day, and on the 12th day of Yihai Day, King Wu ran to Songshan to "complete", and it is conceivable that the ceremony of "ascending to the sky" should have been held on Songshan at that time.
This incident is engraved on the famous Heavenly Death Seal. The inscription says:
Yihai, the king has a big feng (ceremony). Wang Fan tripartite. The king is enshrined in the heavenly chamber.This "king worships in the heavenly room" of the heavenly chamber is the east peak of Songshan Taimur Mountain, the highest peak of Taimur Mountain is the extreme peak, that is, what is said in the "Book of Songs".
Song Gao Weiyue, Jun Ji in the sky. Wei Yue descended, Shengfu and Shen.
Heaven is dead. 
Inscription of the Heavenly Dead.
Why is King Wu so obsessed with "ascending to the sky" and announcing his success to the sky?Of course, this is the same as the purpose of building Luoyi during the later reign of King Cheng, the purpose."Come to God
According to the records of the Book of Rites, the Son of Heaven ascends to the queen of heaven, and those who receive the mandate of God will have the auspicious fortune of "dragon turtle descending".
What kind of auspicious time is this?
It's the Hetu Luo book.
Guan Zi Kuang Jun Xiao Kuang said:
The people of the past were ordained, the dragon and turtle were fake, the river was mapped, the book was published, and the earth was yellow. Today, Sanxiang has not seen anyone, although it is said that he has been ordered, he has nothing to loseThe dragon and horse are out of the river map, and the turtle is out of Luoshu, which is the "dragon turtle fake".
Dragon tortoise fake. Yi Chuan's "Dictionaries" also says:
The river is out of the picture, Luo is out of the book, and the sage is the same.It can be seen that Hetu Luoshu was already a symbol of the Mandate of Heaven at the latest in the time of King Wu of the Western Zhou Dynasty!Its origins are much earlier!Coincidentally, this "Qian" hexagram of "mountains in the earth", the hexagram sequence in "Zhou Yi" is the fifteenth hexagram, fifteen, which is the sum of the three numbers of arbitrary vertical and horizontal on the Luo Shu, which is known as the four positive and four dimensions of the nine palaces performed by Taiyi, the "God"!
"Therefore, Taiyi takes the number of them, in order to line nine palaces, four positive and four dimensions, all in fifteen" - Zhou Yiqian chisel degreeThe author of "Zhou Yi" put this hexagram of "mountains in the earth" in the fifteenth hexagram of the whole book, isn't it implying that after the mountain in the earth of Songshan "rises to the sky", you can get the river Tuluo book brought by the "dragon turtle fake"?
All the yin lines of "Zhou Yi" are called nine, all the yang lines are called six, and the sum of them is exactly fifteen!
All the yang lines of "Zhou Yi" are written as "seven", and all the yin lines are written as "eight", and the sum is exactly fifteen!
"Yi" is a combination of yin and yang, and it is said that it is the way of fifteen. Yang changes to nine of seven, yin changes to eight six, and it is also in the fifteenth" - Zhou Yi Qianchisel "".Doesn't this mean that "Zhou Yi" was written on the basis of the Hetuluo book?