After Gu Chen practiced Xingyi Quan several times on the top of the mountain, he ran down the mountain at top speed without stopping.
He had maintained the Gangqi body-protecting state, and he could not feel any pain when the branches struck him.
Of course, even if he doesn't use Gang Qi to protect his body, he still won't feel any pain.
However, Gu Chen discovered it immediately.
When the invisibility cloak on his body is beaten by branches, part of the energy in his body will be consumed.
Although it is very small, the Yuan Qi produced in the cells cannot keep up with the consumption.
As a result, if the supply exceeds the demand, the Yuan Qi stored in his Dantian will be in a gradual consumption process.
Gu Chen removed the Gang Qi protective body, and the Yuan Qi in his body stopped losing instantly.
Ten minutes later, Gu Chen returned to the foot of the mountain, put on his clothes and left.
At around 5:30 in the afternoon, he returned to Villa No. 28 after having a quick bite outside.
Throwing your backpack on the sofa, you took a few steps to the kitchen.
"Zizzizi, snapta-"
Yes, he lit up the natural gas stove.
Without saying anything else, he used the Golden Bell Iron Cloth Shirt again to let the body-protecting energy cover his whole body, and then directly stretched out his hand to bake on the stove.
"Is it really incorrigible?"
Gu Chen was pleasantly surprised. He had been roasted by the full-strength outer flame for ten seconds, but his palm did not feel any pain at all, and there was not even any burning.
He continued to bake, not just his hands, but even his head.
A minute passed, and Gu Chen removed the protective aura.
Because in just a short period of time, most of the Yuan Qi in the Dantian has been consumed.
With the shortage of Yuan Qi, the body-protecting Qi has also become extremely unstable. Moreover, he is not proficient in it, and with the consumption of Yuan Qi, this phenomenon is normal.
He believes that as long as he improves his proficiency, he can control the body-protecting Qi anytime and anywhere, and it is not impossible to even cover only a certain part of the body.
"I wonder if this thing can stop bullets?" Gu Chen suddenly had this idea again.
It stands to reason that he can withstand the collision of a car, and a mere bullet should not be a problem.
Gu Chen didn't think much about it. After all, this was not very realistic. Guns were banned in the country. Could it be that he went abroad specifically to prove that he could carry bullets physically?
"You can try the shotgun. I wonder what Uncle Liu is doing?"
Gu Chen suddenly thought of Liu Tao.
Although the country has now banned shotguns, Uncle Liu must still have them at home. Even if he does not have a shotgun, he must have an air rifle.
Gu Chen came outside the house again and took out buckets of water from home and poured it into the water tank.
He had no choice but to do some physical work as there was no water pipes at home, which was not even a drop in the bucket for him.
After a while, the big water tank was filled with clean tap water.
He picked up the body-protecting energy of the golden bell-covered iron cloth shirt and jumped into the large water tank with a pop. The water spilled all over the floor and soon seeped into the turf.
"Not bad, it's really waterproof."
Gu Chen raised his hands soaked in the water. There was not a drop of water on the hands exposed to the air.
Then he stood up again. Except for his shorts that were soaked by the water, even his hair was extremely dry, just like before he entered the water.
Gu Chen squatted down again, took a deep breath, and then buried his head under the water.
He just wanted to try and see if he could breathe underwater.
Bubbles began to bubble on the surface of the water, and in less than a second, he exhaled all the air in his lungs.
After hesitating for two seconds, he took a gentle breath through his nose.
"Wow...cough cough cough cough-"
He surfaced momentarily, coughing and trying to expel the fluid from his lungs.
"It seems that we can only protect against the surface, cough cough cough... but the lungs cannot protect against it, cough cough..."
At this time, his lungs were extremely uncomfortable and he coughed continuously. It took more than ten minutes for him to feel relieved.
Gu Chen took off his iron cloth shirt with golden bell cover and jumped out of the water tank.
This personal experience shows that the body-protecting Qi of the golden bell iron shirt cannot prevent air intrusion. At the same time, the mouth and nose become a breakthrough point for the protective shield.
He thought hard for a solution.
Now I am not afraid of water or fire, but if others release poisonous gas, I still have to cool myself.
"By the way, since the main purpose of breathing through the nose is to inhale oxygen, why not skip external breathing and go directly to internal breathing."
Gu Chen suddenly realized.
I had studied biology in high school and biochemistry in college, and internal breathing was mentioned in this knowledge.
As we all know, inhaled oxygen undergoes gas exchange in the lungs, is then captured by red blood cells, and is then transported to various parts of the body along the arteries and blood vessels.
At this time, the red blood cells are presented to tissue cells through the capillary wall, and the cells use oxygen to perform oxidation reactions to generate carbon dioxide, water, and ATP (energy).
The carbon dioxide produced by cells is transported to the lungs through red blood cells and expelled from the body through external respiration.
As a result, the body completes the entire breathing process.
In general, the body's inhaled oxygen and its exchange in the lungs belong to external respiration, while the gas exchange between tissue cells and red blood cells belongs to internal respiration.
Gu Chen has now broken through to the dark realm, and has also mastered the control of the pores on his skin.
Moreover, the pores on human skin can also breathe, but they cannot be controlled.
"Then I take the required oxygen into the body directly through the pores, and the other unnecessary gases are not allowed to enter. Then can't I breathe directly internally without external breathing?"
As soon as he thought of it, he began to control the pores to separate the gases in the air, allowing only oxygen to enter.
I saw the pores on his skin closing and opening, just like the ups and downs of a human chest, as if they were alive.
If one could see the molecular structure of the gas at this moment, one could clearly observe that the pores of his skin incorporated oxygen molecules into them, while other large molecules such as CO₂ and N₂ were blocked by an invisible energy.
"It really works!" Gu Chen was surprised and felt happy in his heart.
Unexpectedly, he only tried a little and succeeded without any hindrance.
He immediately closed his eyes again and concentrated on controlling all the pores on his skin.
Gu Chen just stood motionless, his chest not rising at all, but his mouth was slightly open, and he kept spitting out air, but no air flowed in.
One minute, two minutes...
After about thirteen minutes, he finally stopped breathing through his skin and started breathing through his mouth and nose instead.
"Thirteen minutes, not bad."
Gu Chen gasped for air and felt very satisfied.
He originally thought he could keep breathing through his skin.
Unexpectedly, as time went by, he felt more and more unable to control his pores.
"It seems like I need to practice harder."
Gu Chen encouraged himself, then jumped into the water tank again and buried his head in the water.
Bubbles began to bubble on the water tank continuously.
Under the water, Gu Chen concentrated on using the pores on his skin to separate the oxygen in the water.
Not only that, he also sacrificed the protective energy of the iron cloth shirt with golden bell cover.
The final result made him very satisfied. Even though he was separated by a protective sheath, he could obtain oxygen molecules from the water.
"Hahaha--"
Gu Chen jumped out of the water tank with a smile.
This internal breathing method that uses the pores of the skin does not consume Yuan Qi at all. As long as the control is sufficient, it does not even consume a little bit of mind. It can be treated as natural breathing.
"With this breathing method, and what oxygen tank is needed, wouldn't it be like divine help to go panning for gold on the seabed in the future?"
