On the highest mountain peak of more than 700 meters above sea level, a figure is sitting on the top of the mountain with his eyes closed.

It was Lin Xuan who disappeared from the laboratory.

He's been here for three days.

The wind on the top of the mountain was very strong, and it could even blow a stone of hundreds of kilograms to shake, but Lin Xuan seemed to be connected to the mountain under his buttocks, his slightly slashed body did not move at all, and what was even more strange was that the corners of his clothes and the tips of his hair were also still.

Within a radius of tens of meters around his body, it seemed to become a vacuum area, isolated from the outside world.

Although the outside world was calm, his body was like a turbulent sea, and the spiritual power was raging and colliding wildly in the meridians, running in the meridians in his body at a terrifyingly fast speed, and even the meridians that had reached the third layer of the Great Perfection of the Eternal Immortal Body that were even tougher than alloy were a little unable to hold on, and cracked out one after another small cracks.

The Vientiane Jue also ran to the limit, and all the aura within a radius of ten kilometers was involved, and his body was like a bottomless black hole, devouring a huge amount of aura into it.

After these spiritual energy entered his body, they gathered into the meridians, like pouring rain into the rivers, making the spiritual power in the meridians stronger and stronger, like a raging flood, raging and rushing in the meridians, running for one week after another.

Over the course of three days, the feeling of loosening the bottleneck became stronger and stronger, as if only a layer of window paper was needed to pierce it.

This window paper is getting thinner, thinner, thinner......

The spiritual power in the body, which was originally in a gaseous state, became more and more condensed and condensed......

Finally, after condensing to a certain extent, a critical point was reached, and a drop of liquid spiritual power formed in the body and landed in the dantian.

Rumble!

A loud sound suddenly sounded in his ears, like the first thunder in heaven and earth, opening up the heavens and the earth and bringing endless vitality.

After this drop of liquid spiritual power fell, as if the switch of the faucet had been turned on, all the spiritual power that had been accumulated in the body quickly transformed into a liquid state, like a rainstorm, all of them quickly fell into the dantian and gathered.

The most obvious difference between the foundation building period and the qi refining period is that the gaseous aura in the body has become a liquid spiritual element.

Lingyuan is the product of a high degree of condensation of spiritual energy, it can be said that the spiritual power contained in a drop of spiritual yuan is hundreds of times that of spiritual energy, even if it is a monk who has built a foundation, the total amount of spiritual power in his body is more than 100 times that of the peak of qi refining.

In the process of transforming the aura into the spirit element, his body is also changing, and the muscles, bones, and blood of the whole body are wriggling and evolving, as if there is an invisible hammer tempering his body.

The bones are more crystalline, the meridians are tougher, the blood is more energetic, and the muscles are tighter, like steel, and they are put together to become more perfect.

Black toxins and dirt gushed out from all over the body, and finally came out of the surface of the skin and adhered to it, emitting a foul smell, like sludge deposited for thousands of years.

In this way, after a long time, the changes in the aura in his body and the changes in his body slowly calmed down.

Suddenly!

Lin Xuan opened his eyes, and a golden light like thunder and lightning shot out from it, hitting the void hundreds of meters away, and it couldn't dissipate for a long time.

And his body shook, and all the dirt on his body flew outward and disappeared.

Now he is like the Buddha who cultivated into a glazed golden body in ancient legends, flowing with white light, and the whole person is like a piece of superb jade, giving people a warm feeling, softer, not as sharp as before.

He now feels very transparent and comfortable, as if all the parts of his body have been replaced, and he even has the urge to shout at the sky.

The spirit element in the dantian in his body also operated on its own in the meridians, bringing him a very powerful sense of power, as if he had the ability to pull out the mountains and cover the world.

Finally, two years after his return to Earth, he returned to the realm of the Foundation Building Period.

In the spirit world, the Qi refining period is just the beginning of the path of cultivation, and it is nothing at all, and it is the lowest level of minor cultivators, who can only act as miscellaneous disciples and outer disciples of the sect.

And only when the breakthrough reaches the foundation building period can it be regarded as truly opening the door to cultivating immortals and embarking on the road of immortality.

The lifespan of a Qi refining cultivator is only more than 200 years at most, while the lifespan of a monk in the foundation building period can reach five or six hundred years, which is almost tripled, which is equivalent to the first-class characters of the earth immortals in Chinese myths and legends.

As for the Jindan monks at the top, the lifespan is recorded in thousands of years.

From the breakthrough of qi refining to the foundation building, not only will the longevity be longer, but the spiritual power will also increase by hundreds of times, and the supernatural powers used will also be more powerful.

If he could still be injured by missiles and thermal weapons during the Qi Refining Period, then after he broke through to the Foundation Building Period, he could use these ordinary conventional weapons, just like mosquitoes tickling him, and he would never be able to do any harm to him.

Now the only thing on earth that can hurt him may be the atomic weapons that the world's major powers have shocked the world.

Based on what he had learned, he speculated that the power of the atomic weapon might be equivalent to the full force of a Peak Monk or a Jindan Monk during the Foundation Building Period.

The foundation building period is divided into nine small realms from low to high, one turn and two turns...... Nine turns.

With his current cultivation in the foundation building period, it is still difficult to deal with it.

However, he is not an immovable target, and he will not rely on his physical body and cultivation to become a positive hard antigen weapon.

As long as he is not at the center of a nuclear explosion, with his speed and strong body, atomic weapons will not cause fatal damage to him.

And although he has just broken through to the foundation building period, there is no bottleneck for him in these small realms, as long as the spirit yuan has accumulated enough, everything is a matter of course.

According to the current degree of revival of the earth's aura, it is enough to support his easy cultivation to the realm of the Seven Turns of Foundation Building.

Moreover, the speed of his cultivation will be even faster than the speed of the Qi Refining Period.

Because the body that was injured by the world-destroying god in the shuttle space, when it broke through just now, it had been completely repaired, and there was no trace of dark injuries and hidden dangers.

Now his physique is enough to compare with those innate spirit body cultivation geniuses, plus his three thousand years of experience and insight, and the supreme exercises he possesses, his cultivation speed will be incredibly fast.

"Boom!"

Suddenly!

There was a huge roar in the sky, interrupting Lin Xuan's dead end.

He looked up and saw dark clouds piling up in the sky overhead, lightning and thunder, and thunder and lightning as thick as his arm flashed in the clouds, exuding an aura of destruction.

"Heavenly Steps?"

He was a little surprised.

It is said that there will be no heavenly tribulation from the breakthrough of qi refining and foundation building, and only from the foundation building period to the Jindan period will there be a heavenly tribulation.

Of course, there are exceptions to everything.

For example, some cultivation demons who are too against the sky, when they break through the Qi refining period, they will give birth to a heavenly tribulation.

Moreover, this kind of heavenly tribulation will be extremely terrifying, even ordinary monks in the Jindan stage will not be able to take it, and the body and soul will be destroyed!

However, if there are other Heavenly Tribulations, it is difficult to say, for him, the Heavenly Thunder Tribulation can only be turned into the nourishment of the thunder charm in his body, and it will not cause much damage.

"Hmph! The Heavenly Thunder Tribulation also wants to hurt me, and I can't do it!"

Lin Xuan snorted coldly, his figure had disappeared from the top of the mountain, turned into a streamer, and headed towards the thunder layer in the sky!