Cold, high pressure, lack of oxygen.

Every dilemma that is enough to kill people when taken out alone is all added to Li Changqing at this moment.

The water rushed into the collapsed place wildly, and the high-speed flow formed a huge gravitational whirlpool, and Li Changqing stood in it, every cell in his body was trembling.

Long before, he had run out of oxygen in his body.

Muscle cells can also use up glycogen through anaerobic respiration, barely overloading.

But the internal organs, the heart, and even the more important nerve cells cannot.

In normal people, after one minute of suffocation, consciousness will begin to blur, and after three minutes of suffocation, the organs in the body will quickly fail, heart disorders, and even stop beating.

Once it exceeds 6 minutes, nerve cells will be irreversibly damaged due to lack of oxygen, ranging from brain lesions to death on the spot.

Qi and blood can relieve muscle fatigue, but there is no way to protect nerve cells.

At this moment, Li Changqing's qi and blood have not been exhausted, even if he breaks the limit and gains physical strength.

If there is no oxygen, there is no oxygen.

Warriors are not psionic beings, and have not yet been freed from the shackles of carbon-based life.

It's just that you can last longer than normal people.

But after ten minutes, he still couldn't solve the problem.

Surely death.

Suffocation is extreme torture.

The pain of the lungs exploding and the brain tearing, combined with the blockage of blood circulation caused by a heart disorder, is enough to make people go crazy.

And Li Changqing is not only a martial artist, his listening power is also great, and his sense of all parts of his body is dozens of times stronger than that of ordinary people.

Naturally, the pain he endured was far greater than the pain of ordinary people suffocating.

At the moment, the bottom of the lake is filled with deadly undercurrents

Li Changqing saw a black fish caught by the undercurrent with his own eyes, and without even struggling for a second, he fell directly into the collapsed hole, not knowing whether he was alive or dead.

Three minutes later.

He was still standing above the collapse, less than a fifth of the qi and blood in his body remained.

At the worst moment, the nerve cells in his brain had already warned him of danger.

The vision in his eyes began to blur, and the optic nerve began to strike because of the lack of provisions.

But there was no trace of anxiety on Li Changqing's face, even though his fair skin had already surged purple.

He was still holding his breath.

"Breathe, how to breathe?"

Mammalian respiration is the exchange of gases through the lobes of the lungs through the nasal cavity, mouth, and respiratory tract.

Li Changqing tried to use the breathing method, he first swallowed the cold lake water, and brought the lake water into his lungs through the wrapping of qi and blood.

The extremely uncomfortable feeling of rejection almost made him open his mouth and cough, but he was suppressed by Li Changqing with a strong will.

Breathe!

The Qiankun breathing method works.

Ten seconds later, Li Changqing's face was swollen and red, and he spat out the lake water.

"No, the oxygen level in the lake water is too low, and my lungs are not gills, so I can't exchange oxygen directly through the water."

In contemplation, another minute passed.

Four minutes!

A dangerous red line is approaching.

Is there a way other than the lungs?

At this life-threatening time, the body's protective measures are fully opened.

Li Changqing's brain spun rapidly.

Those who are in the universe are also heaven and earth.

Heaven and earth, all things.

Since this breathing method is called Qiankun.

How can heaven and earth, which encompass all things, breathe only with the lungs?

Countless spiritual lights flickered in Li Changqing's mind.

Rumble!

Suddenly, the qi and blood hugged the Dan in the dantian, and the yin and yang rushed together.

All the qi and blood in the body were forced under the skin by Li Changqing.

The pores of his body opened, and high-temperature vapor erupted from all the pores of his body.

At the cold bottom of the lake, a large amount of white air currents are formed.

The exhaust gas heated by qi and blood to the boiling hot was sprayed out of Li Changqing's body, and the extremely high temperature directly heated the lake water around his body.

As the lake heats up, slowly, a large number of fine bubbles emerge.

Now is the time!

Qiankun breathing method!

Whew-

Li Changqing still closed his nose and lips.

Instead, he was covered with pores, opening and closing regularly with the operation of the breathing method.

Suddenly, he swallowed the fine bubbles that bubbled out of the surrounding lake water.

Cool and smooth.

It's a feeling far better than running thousands of miles in the hot desert and drinking cold Sprite.

A long drought and a rainy day are not enough to describe Li Changqing's happiness.

Oxygen!

The cells of the body cheered in unison.

A large amount of oxygen enters his body, which does not need to pass through the lungs at all, and is directly transported throughout the body under the action of qi and blood.

The pores open and close one by one, and carbon dioxide is discharged.

The solubility of oxygen, which decreases as the temperature of the water increases.

The water is warmed with qi and blood, causing it to release dissolved oxygen, which can then breathe through the pores.

This is.

Human wisdom!

Exhale-inhale-

The pores open and close, and the expelled hot gases continue to heat the lake water and force out oxygen.

Through the natural suction brought by the air current, the oxygen is absorbed by the pores of his body.

This is the Qiankun breathing method!

[Qiankun Breathing Method (Sympathy between Heaven and Man), Proficiency: 75%]

Enlightenment is the best way to improve proficiency.

At one time, breathing proficiency has been increased by a full 25%

It won't be long before he can push his proficiency in the Qiankun Breathing Method to 100%.

Breathe anywhere in your body, without the need for a single nasal cavity and lungs.

The surface area of human skin is 2 squares when spread.

Breathing through your pores is far more efficient than breathing naturally.

A large amount of oxygen poured into Li Changqing's body.

Let the cells of the whole body be activated again.

Rumble!

Thunder roars, tigers roar in the mountains and forests.

The thunder of the tiger and leopard resounded at the bottom of the turbulent lake again.

Li Changqing put on a Tai Chi posture, and he felt the agitation of the water around him with his skin.

In the next moment, the fist changed sharply.

He went directly against the trajectory of the whirlpool at the bottom of the lake and practiced boxing in reverse.

Sympathy between heaven and man.

The force was pouring through the water, and a miniature whirlpool appeared in the huge whirlpool at the bottom of the lake.

And the direction of rotation of the two is completely opposite.

He wants to stir up nature with manpower

The powerful force roared at the bottom of the lake, disobeying the great force of nature, and the pressure on Li Changqing doubled.

The will mobilizes qi and blood, and the breathing method works wildly.

Push the power to the whole body.

"Turn!"

Li Changqing waved his arms, and Tai Chi evolved yin and yang, opening up a space in the whirlpool.

His qi and blood were constantly consumed, but with the operation of the Qiangkun breathing method, it was quickly replenished.

Back and forth, the body was tempered repeatedly.

[Physique +3]

[Qi and blood concentration: 29%]

The pinnacle of three-star martial arts!

New power was born again, Li Changqing found the right time and spread his arms.

"Again."

The huge power, evolved through Tai Chi, completely tore apart the turbulent whirlpool.

Li Changqing directly chose to expand the battlefield, pulling in the farther and larger currents.

The next second the whirlpool expanded, the gravitational pull from the collapse once again attracted a larger lake.

The crack that Li Changqing had finally torn open was not only filled, but also began to push him towards the collapse because of the greater pressure.

I can't even stand still.

The physical strength that had just recovered was quickly depleted, and the body was once again about to reach its limit.

Unable to move, as if surrounded by lead and mercury.

The roaring qi and blood are combined with the majestic flow of water, calcined internally, stamped externally.

A peerless divine weapon slowly took shape.

Finally, under the tempering of internal and external pressure.

Li Changqing's qi and blood once again broke through the limit.

[Physique +3]

[Qi and blood concentration: 33%]

Rumble!!!

The barrier of the three-star martial artist was completely broken by Li Changqing.

The qi and blood broke through the bottleneck, and as the strength of the Bao Dan became more and more condensed, it was entrenched in the dantian, round and golden.

It's like a mythical golden pill.

At this moment, compared with before, he is already a cloud and mud.

Whirlpool?

Standing firm on his legs, his powerful qi and blood moved slightly, instantly resisting the pressure of the lake.

Li Changqing raised his arms, his qi and blood penetrated his body, and he stirred up a wider range of lake water through the transmission of strength.

"Open it for me!"

Burst of power.

The whirlpool was torn apart by Li Changqing, and his whole body stood at the bottom of the lake collapsed, with both palms pushed out.

But this time, it didn't wait for the lake to usher in a bigger counterattack.

Li Changqing took the first step, his feet off the ground, and he was suspended above the collapse in this way.

"Up!"

The powerful qi and blood soared into the sky, and the incomparable strength really withstood the pouring of the lake.

He stood proudly above the collapse, his hands evolving Tai Chi to stir the lake.

The whirlpool could no longer be formed, and after breaking through, Li Changqing's strength was already above the flowing water.

The water inside the collapse area flowed away rapidly, leaving the stone exposed, and the surface gradually dried.

The strong force is like a substance, forming an iron wall at the collapse of the bottom of the lake.

Li Changqing relied on manpower to live at the bottom of the lake at more than 40 meters, isolating the impact of the water flow and creating a dry place without water.

"Four stars?" Li Changqing realized that there seemed to be infinite power in his body.

Although the breakthrough was a joyful event, he had a feeling.

The Qiankun breathing method is like the engine of a supercar, and I have not touched its limits now.

Four stars is by no means the end.

Looking at the collapse under his feet, Li Changqing's expression flashed.

With his legs slightly bent, he jumped straight into the hole, standing in this deadly position.

The next moment.

The barrier of qi and blood is released.

In an instant, the sky collapsed, and thousands of acres of lake water poured in.

In the next second of contact, a huge force slapped on Li Changqing's body, his throat was sweet, and he opened his mouth to spurt out blood like arrows.