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The gastrointestinal nervous system, known as the second brain, is made up of neurons, neurosensors, and proteins scattered across the tissues of the esophagus, stomach, small intestine, and colon.

Just like the brains in the skull, they also transmit information quickly to each other, independently perceive, receive signals, and respond accordingly, causing people to feel "happy" and "uncomfortable", but it cannot have the function of thinking like the real brain.

The nerve center of the brain and the gastrointestinal nervous system maintain a loose connection through the vagus nervous system, which sends only a small fraction of the information to the nerve center of the brain, and in most cases, the "second brain" functions independently.

Therefore, the dantian that the ancients said is an acupoint closely related to the second brain, it is not the most critical acupoint of the human body such as the dead acupoint or the second acupoint, but the dantian is the most sensitive and easy to cultivate in the human body. Becoming an immortal is also mostly the inner alchemy pill into the abdomen, and the external alchemy elixir to take these sayings and ways.

This also explains the problem that Chen Ting can use his thoughts to directly drive the divine pattern after looking at the bitter sea: after all, the nervous system is still connected, and the divine pattern belongs to the prototype of the biological macromolecular protein nanorobot, although it is too large due to a compilation error during secretion and cannot be folded and completely formed, but it still retains the function of responding to nerve impulses.

Whether it is the path of practicing qi or the way of covering the sky, it starts from the dantian. The road of practicing qi begins with the cultivation of qi and the cultivation of qi, and holds the dan in the dantian in the realm of sitting and forgetting, and achieves the "Jindan Avenue", that is, "descending the white tiger", so that "a grain of Jindan swallows into the abdomen, and from now on my life is up to me".

And the way to cover the sky, before the wheel of the sea is also to nourish qi and practice qi, the life essence of the whole body is strong, and then impact the dantian, break the blockade of the human body's secret storage, open up the sea of suffering, break the shackles of the human body's life, and liberate the supreme potential.

Chen Tingzhi built a foundation for qi training with the road of practicing qi, and cultivated his life essence extremely strongly, and then by chance, under the interference of the protagonist's aura, under the influence of the night emperor's true qi, and under the control of the instinct that had been transformed by high-energy cells, when he held the dan, he directly transformed the dantian acupoints into a high-energy cell group, opening up an alternative sea of suffering.

With high-energy cells, which have the totipotency of cells, have a well-developed cytoskeleton and a thick cell fluid, and can act as nerve cells, muscle cells, endocrine cells, and even bone cells at the same time, they are the ultimate biological cells on the road of evolution.

Even if it is just a mortal body, the alternative bitter sea constructed by Chen Tingzhi with high-energy cells also has extremely high potential, comparable to the holy body dantian, which feeds back to the second brain near the dantian, so that the body can continue to evolve in an all-round way. Moreover, with the two Dao methods of the Seventy-two Transformations of the Earth Demon and the Thirty-six Transformations of the Tiangang on the path of practicing qi, there is also infinite potential for embarking on the path of covering the sky.

Although he had only reached the fetal breath realm of the dragon and tiger subjugation evolved from the dragon and the tiger in the mountain character gate of Tiangang Thirty-six Changes, Chen Tingzhi had a hunch that even if he cultivated to the end of the Wheel Sea Realm and reached the realm of the other side, the spiritual cultivation of the fetal breath realm at this time was still sufficient, and he could even support the final nine life and death transformations.

Even though it has only been a day since the Sea of Bitterness was opened up at this time, Chen Tingzhi still has the ability to use all the seventy-two changes of the Earth Demon and the thirty-six changes of Tiangang, although the power will not be enough because the realm is too low. For example, the whip mountain moving stones in the thirty-six changes of Tiangang, Chen Tingzhi can only drive a small mountain bag less than a few tens of meters now.

Chen Tingzhi calculated, as soon as he entered the Wheel Sea, he had the so-called power to break the army, but he could also break the army of the Cold Weapon Period. And when it comes to the realm of the spring of life, it is said that it can kill the realm of the sea of bitterness like killing ants, and at this time it is estimated that it will have the power to break the army of the World War II period, and the realm of Shenqiao is comparable to the current modern conventional army, and the realm of the other side is about to correspond to the unconventional army.

After testing his strength, Chen Tingzhi returned to the Qingniu Concept, began to read "Covering the Sky" carefully, and carefully wrote down the notes, and wrote down the key points of attention in each realm.

The wheel of life cultivates the dantian, opens up the bitter sea, the essence of life turns into a surging sea, cultivates the spring of life, the wheel of life excavates the spring of life bubbling and surging, erects a divine bridge, forms a divine vein to investigate the lost way, reaches the other side, and transforms into life and death nine times.

The Dao Palace cultivates the five organs, the heart, liver, spleen, lungs and kidneys, and the five elements give birth to the five gods, turning into vitality and deriving Dao power, which is really a place of nourishment. The essence is not diarrheal, and the life is immortal.

The four poles cultivate the limbs, and the limbs of the human body correspond to the four pillars of heaven and earth.

The dragon cultivates the spine, so that each section is like the pillar of the sky, solid as a rock, and the spine is manifested as a dragon when the secret realm is perfect, and finally the spine dragon climbs into Sendai after nine changes.

The Sendai in the back is to cultivate the brain, liberate the brain domain, and open up the potential of the human body, and the first layer of Sendai is equivalent to a secret treasure, and finally ascend to the sky step by step, ascend to the nine heavens of Sendai, and achieve the emperor.

At the same time, although Chen Tingzhi still doesn't know the follow-up path of his alternative sea of suffering made by high-energy cells, he still practices every day to polish the sea of suffering.

The surging bitter sea of black water was fixed at the size of a fist and did not continue to expand, but when Chen Tingzhi polished the bitter sea every day, he would find that a divine pattern was born, which was very different from the chakra realm in the real way of covering the sky, after all, this divine pattern was a protein product secreted by cells.

Therefore, the embryo above Chen Tingzhi's Black Bitter Sea also fused with the divine pattern while refining and compressing when polishing the Bitter Sea, and now it has become more lustrous, and even flashes with various strange glows. Chen Tingzhi is not surprised, the human body already has a glow phenomenon, and proteins also have optical rotation.

"It's not so easy to be promoted to the Lifespring realm, I'd better focus on this embryo first, it's been delayed for so long and I haven't decided what heavy weapon to build, it's really not true." Chen Tingzhi closed the excerpt of the notebook of the Emperor who became a red dust fairy in the Ninth Dynasty of the end of the law era, ending the reading journey of "Covering the Sky".

"Build a tripod? Three-legged and two-eared round tripod or four-legged and two-eared square tripod? ”

"Or do you want to build a clock? So is it the temple chiming bell or the most primitive chime in ancient times? ”

"It's okay to build a tower, so is it a square tower or a round tower? Is the tower nine or thirteen? ”

"A furnace? Ding furnace or fire furnace? ”

"Mirrors? One-way mirror or two-way mirror? ”

"Knives? Long knives, short knives, seedling knives, large knives? ”

"Sword? Han Bafang? Seven Star Sword? Longquan Sword? Knight's sword? Stabbing the sword? ”

"Spear? Gun? Halberd? Spear? Huh? Spear? ”

Chen Tingzhi took out a piece of paper and wrote on it casually, recording a large number of information about heavy weapons such as Zhong Ding, as well as other famous imperial soldier prototypes and some weapons in "Covering the Sky", but he still couldn't make up his mind.

The bell is a heavy weapon, more powerful than other types of weapons, but this is only the rule of "Covering the Sky", and it may not necessarily represent the other multiverses connected by the Lechuan River. In different worlds, some of the most powerful weapons may be swords, some may be knives, some may be books, and some may even be lollipops.

However, there is no regret about refining this kind of thing, after all, this will not only affect the current sea of suffering in the physical body, but also affect the spiritual space in one's soul. If there is a mistake in the cultivation of the physical body, you can reincarnate and re-cultivate, wash and start over, but if you make a mistake in the soul, it will be ruined.

To be honest, Chen Tingzhi is inclined to build a halberd, because the halberd can integrate his Shanhai Fist, Aurora Qi Knife, and even the Great Mudra and the Great Sun Burning Sun Legs. As long as he has a halberd in his hand, Chen Tingzhi can use the four killing moves at the same time with a shake of his wrist, and even cooperate with the sword to point at Qimen and Qimen to move the halberd to overwhelm the enemy.

"Anyway, my sea of bitterness is different, and new god patterns are produced every day, so let's make a big wave." Chen Tingzhi decided to build a treasure ship for himself as a tool. After all, he is now in the Lechuan River, there is no boat to cross the bitter sea, and the Lechuan River can only drift, and a treasure boat is exactly what he wants.

Chen Tingzhi did not immediately start building the vessel that he named the treasure ship of creation, but first went to find information and taught himself how to assemble the ship model. Then he designed a treasure ship little by little, and then built it with his own hands from a poplar tree in the backyard, and finally began to prepare the refining weapon.

The keel is like a knife, the hull is like a fist, the long oar is like a leg, the mast is like a halberd, the sails are one, the ship building is five floors, the rudder is strange, and the cannon thunders. Chen Tingzhi pinned all his knowledge on the structure of this ship, as long as the treasure ship appeared, he could burst out all his strongest means at the same time.