The term LienShan 連山 may have been originated from the period of LienBu 連逋. Based on the evolution of ancient Chinese civilization, there is a period called the chronicles of LienBu (連逋). LienBu (連逋) comprises of 2 words one known as Lien 連 meaning "to come together" while the other means Bu 逋, meaning is "to flee". It is a period where the combination of 3 huge clans are separated into 4 clans caused by population growth within the scarcity of natural resources. Within these 4 clans, fighting for survival are very common thus power struggles gave rise to clan’s wars. A good reflections of the Saga among the Chinese "Titans" predating ChiYou, ShenNong and HuangDi, more likely FuXi, NuWa, GongGong and ShuiShen.

If you Google the history of China, you will be greeted by the fact that The Yellow River is said to be the cradle of Chinese civilization. The known Xia Dynasty 夏朝 is believed to be the known first dynasty of China. LienBu (連逋) is way before the first Dynasty of China. It may also predates HuangDi, ShengNong and ChiYou. 

Within its chronicles, it is recorded the Supreme Ancient HeTu Lineage  太古河圖代姓.

This piece of chronicle comprises of at least 3 doctrines of: -

1. Supreme Ancient 太古
2. River Map 河圖
3. Lineage 代姓

Supreme Beginning (太始) is born out of the Primal Chaos (混沌) singularity, to form the Original Fetus (元胎) which is the Supreme Ultimate (太極). It is the Heaven and Earth (天地) or the father and mother (父母) to the Supreme Yi (太易). Supreme Yi (太易) is never constant and ever changing. Such movement give rise to the Two Slices (兩儀) of YinYang (陰陽). Its dynamism is creation called the Supreme First (太初) who in return generates the 4 imageries (四象). These 4 imageries (四象) are HeTu (河圖) that is also called  the Supreme Essence (太素) of all creations, notably Heaven, Man and Earth Three Talents (三才). Human's existence between Heaven above and Earth below are the chronicles of its lineage called Supreme Ancient (太古) where the maternal lineage are the order.

The Supreme Ancient HeTu Lineage 太古河圖代姓 is very close to the description of The Ultimate One gives birth to water, water in return assisting the Ultimate One 太一生水,水反辅太一.

A recent rendition of the “Origin of Life” by Dato Dr. Victor Wee was inspiring. The opening premise such as: -
"Inconceivable is the beginning, O disciples, of this faring on. The earliest point is not revealed of the running on, the faring on, of beings, cloaked in ignorance, tied by craving” - Samyutta Nikaya (Buddhist Cannon)."

What it suggests, do not bother to ask what is the origin of life as it will not be understood by those who is bound by ignorance and craving. Therefore, the Chinese simply called it the Ultimate One (太一), without the necessary to define what constitute the One.

Implying that the One, may have arisen from the “First Cause”, it is the so called God created everything. The idea of the almighty God, is strangely, spur provocative philosophical discourse by non other then the maverick, Sir Bertrand Russell in his controversial book, “Why I am NOT a Christian”. He questioned, if God is responsible for the creation of everything, then by the same implication, God must have its own creator. In a nutshell, there is a first of the First Cause ad-infinitum.

The Chinese implied that the One as nothing more than a line (At least that is the pictogram of the Chinese character One), it also implies that the One is a line connecting all the “First Causes”. The idea of connection implies movement, as a stroke of a brush. So, the ultimate stroke is the First Cause. Scientist believes that such stroke represents another controversial idea, the “Big Bang”. The aftermath of such created water. The Chinese theory of Evolution begins with this phrase, The Ultimate One gives birth to water, water in return assisting the Ultimate One (太一生水,水反辅太一) .

The Ultimate One gives birth to water Scripts is believed to be written about 300 BC during the Warring States period on 14 bamboo strips in the Chu script. It was discovered in 1993 in Hubei, Jingmen. It is part of the Guodian Chu Slips (郭店楚簡). Thus, it became the fundamental doctrines for the Daoist art of cause and effects.

If there is a cause, there must be an effect. Water is the effect. The Greek Mythology stated that the world is created by Oceanus (son of Uranus and Gaia) and the Greeks must have a reason to believe in that. From water, the Chinese believes that The Ultimate One gives birth to water, water in return assisting the Ultimate One, therefore establishing Heaven, in return establishing Earth (太一生水,水反辅太一,是以成天. 天反辅太一,是以成地.). At this point, 2 new ideas emerged, Heaven and Earth. It was also said, the Chinese folklore has the Giant PanGu (盤古) separating Heaven and Earth, within his anatomy, landforms were shaped and rivers were excavated. Very strange that the Chinese paints his personification as a Giant similar to the Greek mythology, Titan race of Giant Atlas. More strange is in his given name PanGu (盤古) denoting “ancient plate”.

This “plate” is referring to the Milkyway Galaxy, as modern sciences revealed it to be a resemblance of a Disc! From one point it resemble a circle, the Chinese called, the Ultimate (太), while from another angle, a slim shape Disc in the form of One (一). The noble act of the Giant PanGu (盤古) separating Heaven and Earth, marks the beginning of evolution sometimes called, Heaven and Earth fixed position (天地定位). As he decomposed, his flesh and blood turn to mountains and streams which are also known as Mountain and Stream same Qi (山泽通气), so on so forth. The script TaiYi Sheng Shui states, Heaven and Earth, assisting thus, therefore establishing Gods (spiritual enlightenment), in return establishing YinYang (Duality) (天地复相辅也,是以成神明. 神明复相辅也,是以成阴阳.).

Again, the term ShenMing (神明) is rather sketchy. This term has 2 compound words. Shen (神) can mean spirit, gods or unknown forces. Ming (明) comprising sun and moon denoting enlightenment, wisdom or knowing. When both words are conjoined, it has multiple meanings but in this context it simply denotes the seeds of human evolution. The Chinese folklore continues to say, Nuwa (女媧) created humans from the mud of the Yellow River, therefore the Chinese has a yellowish skin texture. Strange similarity from the Book of Genesis, Adam is made from earth of Eden and Eve is part of Adam, personification of the mother Earth as a goddess, in this case, half human half serpent forms liked the Greek Mythology, Medusa. 

Another idea of ShenMing (神明) borrowed from the notion that states, if there is a beginning, there must be an end. If Big Bang is construed as a beginning, Big Crunch is the end. Upon the ending of the world system, lives on Earth parishes and on the other hand reborn as spiritual entities ShenMing (神明). The world system evolved to regenerate itself and when the conditions are met, such as Fire and Water does not shoot each other (水火不相射), these entities which have no gender, live within the water. When the surface of the water is exposed to the heat of the sun and coldness of the night, a crust is formed and became the sustenance of these spiritual entities. With the constant consumption, these entities take forms of single cell organism, manifesting as crude beings on a new world. This is the beginning of life. 

The scripts continue to say, YinYang (Duality), assisting thus, therefore establishing the four seasons, in return establishing cold and warmth. Cold and warmth, assisting thus, therefore establishing wet and dry, in return establishing birth and dead (阴阳复相辅也,是以成四时. 四时复相辅也,是以成凔热. 凔热复相辅也,是以成湿燥. 湿燥复相辅也,成岁而止.), so on and so forth. The ending words, in return establishing birth and dead (成岁而止) has multiple implications. First, the word Sui (岁) means age and Zhi (止) means stop. Compounding bring forth the idea of life and death. The order of things is nothing more than a complete cycle of growth phases rather than the misconstrued productive or weakening cycles. 
Saying thus, it laid the foundation of HeTu.

In HeTu, the Odd number forms a Yang enclosure. While the other Even number forms another Yin enclosure. This enclosure establishes the left or the right turning cycles. 

Why must Yang takes left to right and Yin takes right to left? A matter of coriolis effects? 

Perhaps, in the Northern Hemisphere, the compass is pointing South and an adjustment must be made while in the Southern Hemisphere instead, as the compass ought to have pointed North! All our known SanYuan theory must have been reversed and screwed up for the reference point is always in the context of the Northern Hemisphere... OMG! Is that why the application goes so wrong?

What may seen to be a displaced disc of enclosures are actually stacking above one another. What does this imply?

In the another words, mountain is construe as Yin or mountain is construe as Yang? Water is construe as Yin or water is construe as Yang? Better, when XieZi changes, Mountain are not construed as Mountain, Water is not construe as Water. Mountain can be taken as Water; Water can be taken as Mountain. 

We are able to discern that there are 2 ways to arrange the BaGua namely: -

Early Heaven arrangement, attributed to FuXi 伏羲
Later Heaven arrangement, attributed to WenWang 周文王

Yet there are 3 Yi 三易 namely: -

LienShan 连山, attributed to FuXi 伏羲
GuiChang 归藏 attributed to ShenNong 神農
ZhouYi 周易, attributed to WenWang 周文王

Yet LienShan 连山 and GuiChang 归藏 are said to be lost through time and deemed to have been incorporated into ZhouYi 周易 the forerunner of YiJing 易經, Many modern school uses ZhouYi 周易 especially deriving the concept of WenWang 周文王 LiuYaoGua 六爻卦 and apply them in XK 玄空, which technically may not be so correct.

Yet there is another "classic" called SanFen 《 三 墳 》 that attempt to bring us closer if not further away from the truth regarding 3 Yi 三易. This scripture of the 3 tombs identify that there are: -

LienShan 连山, attributed to FuXi 伏羲
GuiChang 归藏 attributed to ShenNong 神農
QianKun 乾坤 attributed to HuangDi 黃帝

So, QianKun 乾坤 attributed to HuangDi 黃帝 is much earlier compared to ZhouYi 周易, attributed to WenWang 周文王. Thus there are 4 sets of Yi 易 namely: -

LienShan 连山, attributed to FuXi 伏羲
GuiChang 归藏 attributed to ShenNong 神農
QianKun 乾坤 attributed to HuangDi 黃帝
ZhouYi 周易, attributed to WenWang 周文王

The story doesn't just end here. If you look at QianKun 乾坤 attributed to HuangDi 黃帝 it is more aptly closer to Early Heaven arrangement, attributed to FuXi 伏羲. The question remains are: -

Is the Early Heaven arrangement, attributed to HuangDi 黃帝 instead of FuXi 伏羲? Has the LienShan 连山, attributed to FuXi 伏羲 has been incorporated into the Early Heaven arrangement? Perhaps SanFen 《 三 墳 》 may shed some lights?

Three Syllabic Classics or commonly known as SanZi Jing《三字经》is neither a Confusion nor a FengShui classic per-se but it can be taken as the fundamental entry level textbook in Chinese Metaphysics. 

The opening passage: -

人之初 (rén zhī chū) People at birth,
性本善 (xìng běn shàn) Are naturally good (kind-hearted).
性相近 (xìng xiāng jìn) their natures are similar,
習相遠 (xí xiāng yuǎn) (But) their habits make them different (from each other).

Dictates that human nature in its origin is good but their “cultivations” made them different. What caught my attention, when my 7 years old daughter asked me what is: -

有连山 (you lien shan) have combined mountains,
有归藏 (you gui chang) have hidden and revealed,
有周易 (you zhou yi) have Zhou Yi,
三易详 (san yi xiang) three Yi(s) detailed.

I am speechless for a moment and I believed it is not just “pure fortune” telling as commonly taught by her teacher. If indeed true, is that how “cultivation” are meant to be in our modern society?

The true picture may have been there are 3 Yi 三易 comprising of LienShan 连山, GuiChang 归藏 and ZhouYi 周易. LienShan 连山 and GuiChang 归藏 are no longer existed as a complete doctrine or probably merged into ZhouYi 周易. The extinction of LienShan 连山 and GuiChang 归藏 may have been attributed by the burning of books during the Qin Dynasty. However, according to some scholars, it may have survived through its fragments.