It is not difficult to compress gas. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

If the gas is stored in a container and fills the entire container, and you want to increase the concentration of the gas, then there are two options.

One is to keep the space of the container unchanged and continue to fill it with gas, while the other is to keep the amount of gas inside the same and compress the container.

But neither approach will work for the situation Xie An is facing.

He can't absorb the Heaven and Earth Yuan Qi now, the first way is excluded, and his dantian can't be compressed, so the second way is also excluded.

The situation he is facing now looks like another dead end.

But fortunately, the Luoyun Sect has a library pavilion, and there are books in the library pavilion, and there are methods to guide and condense the heaven and earth vitality in the dantian.

Xie An is a good young man who is eager to learn, so he likes to read, and of course he found this method in the library cabinet.

After leaving the library pavilion and coming to the cliff of the back mountain, Xie An sat down on the grass ball of qi cultivation.

According to the method in the book, the heaven and earth vitality in the dantian will be released from the heavenly gate, and the body will be circled around the body before reaching the earth gate.

At this time, Xie An had already closed the passage for the earth gate to return to the dantian, and these heaven and earth vitality could only be blocked here. Then, Xie An continued to mobilize the Heaven and Earth Yuan Qi in the dantian to carry out this cycle, and in the end, the tendons of this week from the Heavenly Gate to the Earth Gate were full of uncondensed Heaven and Earth Yuan Qi, and at this time, Xie An still had half of the Heaven and Earth Yuan Qi in the Dantian left.

When Xie An continued to control the Heaven and Earth Yuan Qi to enter the Heaven Gate to the Earth Gate in this week, the Heaven and Earth Yuan Qi in this vein Zhou Tian would be compressed and condensed a little.

This method actually uses the principle of the first method above, but it is also after many attempts by predecessors, combining the volume of the day from the gate of heaven to the gate of the earth and the volume of the dantian, and finally taking this week as a space for condensing the vitality of heaven and earth.

However, although it is easy to say, Xie An is not so easy to do.

If you want to use this method to condense the Heaven and Earth Yuan Qi, then the requirements for the container are very high, and at this moment, Xie An's vein, which is the container, is under tremendous pressure.

It was fine at the beginning, but when there was only one-third of the Heaven and Earth Yuan Qi left in his dantian, that is to say, two-thirds of the Heaven and Earth Yuan Qi had been squeezed into the tendons of the Heavenly Gate and the Earth Gate Zhou Tian, Xie An felt a trace of pain coming from the tendons and veins that was almost torn.

The corners of Xie An's mouth twitched, slowing down his progress slightly, slowly allowing his muscles to adapt to the current pressure.

In fact, Xie An's muscles and veins are already considered tenacious, every day when he refines his body under the waterfall, he will refine his muscles and veins, and every day when he cultivates qi on the mountain cliff, the heaven and earth vitality also flows through the tendons and veins into the dantian, it can be said that Xie An spends most of his time exercising his tendons and veins every day, and it is difficult for the tendons to be strong or not.

However, if you want to completely pour twice your own volume of gas into it, the pressure that this vein has to bear can be imagined, but fortunately, the tendon veins of this heaven and earth gate are the safest place for condensation that have been tested by predecessors, and Xie An's veins are tough enough, so he has not suffered too much pain so far.

After resting enough, Xie An began to forcibly pour Heaven and Earth Yuan Qi into the tendons and veins, and with the infusion of Heaven and Earth Yuan Qi, Xie An's forehead and sideburns began to bead with sweat, and his teeth began to bite.

Finally, when there was still a quarter of the volume of Heaven and Earth Yuan Qi left in the dantian, Xie An gasped and stopped again.

From half of the heaven and earth vitality in the dantian to the time when there was still a third left, Xie An was quite relaxed, and it took a short time, but from a third to a quarter left, the painful look on Xie An's face did not disappear for a moment, and even the time it took was three times as long as the former.

After stopping, Xie An gasped frantically, but his body didn't dare to move at all, because now as long as there was a movement that touched the veins between the heavenly gate and the earth gate, then Xie An would feel a heart-piercing pain.

After resting for a longer period of time than the last time, Xie An once again concentrated and calmed down, infusing the Heaven and Earth Yuan Qi into the veins.

In this way, Xie An spent a whole morning finally pouring almost all the Heaven and Earth Yuan Qi in the dantian into the tendons and veins of the Heavenly Gate and the Earth Gate Zhou Tian, and now, there was still the last trace of Heaven and Earth Yuan Qi wandering in his dantian, as long as this trace of Heaven and Earth Yuan Qi was also infused into the tendons and veins, so that it could be condensed in the tendons, then it would be done.

Xie An has been resting for a long time, and now he is ready for the final moment.

He took a deep breath and mobilized this wisp of heaven and earth vitality to slowly enter the veins from the heavenly gate he opened, and in this process, Xie An didn't dare to do it too fast, he was afraid that too drastic pressure changes would tear his veins apart, and his veins were now almost at the critical point where he couldn't hold on.

But the slower the process, the more pain Xie An endured, and he had no choice but to grit his teeth and hold on desperately.

One more point...

And one last little bit...

Finally, all the Heaven and Earth Yuan Qi was poured into the veins, and the Heaven and Earth Yuan Qi was condensed in it, condensed into a purer and richer Heaven and Earth Yuan Qi, which also showed that Xie An had successfully reached the second layer of Qi Condensation!

After opening the passage of the earth gate and releasing the condensed Heaven and Earth Yuan Qi into the dantian, Xie An finally let out a sigh of relief.

Only then did he feel that his cheeks were a little sore due to the clenching of his teeth too hard, and his whole body was also in a cold sweat, and at this moment his clothes were wet, as if he had fallen into the river.

And these physical pains don't matter, with Xie An's current recovery ability, they can be eliminated soon, but the tendons and veins of the Heavenly Gate and the Earth Gate Zhou Tian are still in extreme pain, which makes Xie An, who wants to continue to cultivate Qi, a little cringe.

That kind of tearing pain is still very clear now, and then absorb the Heaven and Earth Yuan Qi at this moment, unless the Heaven and Earth Yuan Qi completely avoids this Zhou Tian's veins, but absorbing the Heaven and Earth Yuan Qi is absorbed from all the pores of the body, Xie An can barely control the Heaven and Earth Yuan Qi in the dantian, but he can't control the Heaven and Earth Yuan Qi between Heaven and Earth, and naturally he can't let those Heaven and Earth Yuan Qi avoid the pores around this Zhou Tian Jin and only enter through other pores.

Therefore, in desperation, Xie An had no choice but to give up his plan to continue cultivating his qi today.

It was noon at the moment, and there was still so much time left today, Xie An couldn't help but feel a pain in his heart when he thought that such a long time would be wasted so much.

As the saying goes, time is money, an inch of time is an inch of gold, how much money you have to squander, what a loser!

However, Xie An had a flash of inspiration in his mind, as if he remembered something.

By the way, Xie An slapped his head, but he hissed because the movement was too big and pulled the newly damaged tendons, but the joy of discovering the new world soon washed away the pain.

Xie An remembered the practice requirements written on the book he saw on the second floor of the Library Pavilion, and there were a few eye-catching words written on the title page of the book "Serpentine Sword Technique", which could only be practiced on the second floor of condensation.

At the beginning, it was precisely because he did not meet this requirement that he had to choose to give up temporarily, and now he is already a cultivator of the second layer of condensation, which means that this set of fighting skills has opened his arms to him.

Xie An thought that he would soon be able to learn a fighting technique that was even rarer than cultivating the exercises, and the joy in his heart was indescribable, and he was so excited that he wanted to wave his fists and jump up.

But in the end, he only shook his fist gently in a small way to express the excitement in his heart.

After resting for a while, after feeling that walking and other movements would not affect his muscles and veins, Xie An slowly propped up his body and walked towards the cafeteria with stiff steps.

After a month of devouring the way of eating, Xie An once again returned to the way of eating slowly and chewing, and he ate much slower than the original speed, because his damaged muscles and veins were very close to the esophagus, and as long as there was a swallowing action, it would touch the tendons and veins, which made Xie An scold the senior in his heart who set the tendons and veins from the Heavenly Gate to the Earth Gate Zhou Tian as the container for condensing the vitality of heaven and earth.

After eating lunch with difficulty, Xie An dragged his steps to the library again.

After saluting the old man who was sleeping on the recliner, Xie An went straight to the second floor.

Speaking of this old man is also interesting, Xie An was sleeping when he came to this library in the morning, and he was still sleeping when he came now, and he seemed to be sleeping very sweetly, he didn't see him eat, he didn't see him do anything else, except for Xie An who gave Xie An some guidance when he first came, he seemed to be sleeping at other times.

But Xie An was still grateful and respectful to the old man, so every time he came and left, he would salute the sleeping old man.

Coming to the second floor and opening the "Serpentine Sword Technique" that he had liked before, Xie An began to study seriously.

It is not an exaggeration to say that Xie An has become an idiot in cultivation, as long as it is related to cultivation, he can get carried away, and now after burying himself in this "Serpentine Sword Technique", he doesn't seem to feel the pain on his body, but just devotes himself to the study and research of this set of sword techniques.

In the afternoon, Xie An studied this serpentine sword technique, and finally understood why the serpentine sword technique required to reach the second level of qi condensation before he could cultivate.

Because although this serpentine sword technique is extraordinary, but the consumption of heaven and earth vitality in the body is even more extraordinary, with Xie An's current heaven and earth vitality in the dantian, it can only be used three times The nirvana of this serpentine sword technique, and the other moves of this set of sword techniques also have a lot of consumption of heaven and earth vitality.

What's more critical is that only the Heaven and Earth Yuan Qi that has reached the second layer of condensation Qi can stimulate the essence of this set of sword techniques, and if the Heaven and Earth Yuan Qi is as thin as the first time, no matter how hard you wield the iron sword, it will only be in vain, and it will not be able to exert the true power of the serpentine sword technique at all.

With Xie An's state today, it is impossible to find a place to practice this serpentine sword technique immediately, although his muscles and veins have recovered a little now, but he can only be allowed to perform simple actions such as walking and sitting, once the range of action is slightly larger, it will pull the injured tendons and veins, and it will make Xie An grin in pain.

However, although his body couldn't move, Xie An's mind did not stop, while looking at the teachings in the book, he simulated and practiced in his mind, and mastered the power skills and luck essentials of this serpentine sword technique.

But this swordsmanship skills are not utopian can be improved, the so-called knowledge is easy to do, if you want to practice this serpentine swordsmanship perfectly, the key is to practice a word, without a long time of practice can not be mastered.

Xie Anxin said: "It seems that I will have to find some time to practice this serpentine sword technique every day in the future." ”

For the next three days, Xie An lay on the bed in his residence and did not dare to move.

Originally, he thought that the damage to this tendon and vein would be like a stumble during body refining, and as long as he rested for one night, he would be able to continue cultivating the next day.

But what he didn't expect was that after a night's sleep, the damage to the muscles and veins suddenly erupted like a volcano that had been enduring it, and he was still able to walk on his own after breaking through yesterday, but today he couldn't even move, as long as he moved slightly, the damaged muscles and veins would be in severe pain.

In desperation, Xie An had no choice but to give up his plan to continue cultivating and honestly lay in bed to recuperate.

But thinking that this long time was wasted, and the state of idleness made Xie An'an itchy and unbearable, in the end, he slowly pinched the mantra in his hand and began to practice manipulating the heaven and earth vitality in the dantian.

The current level of Xie An's cultivation qi is at the second layer of condensation, and the heaven and earth vitality in this dantian is also much richer than before, and it has become more difficult to control it accurately.

However, after Xie An's uninterrupted practice every day, it can be said that as long as he finds free time, he will pinch up the trick to train the skills of accurately controlling the Heaven and Earth Yuan Qi.

Before breaking through to the second layer of condensation, he had already been able to accurately control half of the Heaven and Earth Yuan Qi in the dantian during the first layer of Qi Condensation, which was why Xie An was able to accurately and smoothly infuse the Heaven and Earth Yuan Qi into the Zhou Tian tendon veins of the Heavenly Gate and the Earth Gate when he broke through yesterday.

And this kind of thing is practice makes perfect, at the beginning Xie An still seemed very difficult to control, just like a baby toyder, it was difficult, and it took a long time to make a little progress, and the more skilled he became, Xie An's speed began to speed up.

From the previous staggering forward to the later striding meteor and then to the final rapid running, now Xie An is very familiar with the skill of accurately controlling the Heaven and Earth Yuan Qi in the dantian, but the amount of Heaven and Earth Yuan Qi controlled at one time has not yet reached the standard of one law and seven clears, but this is only a matter of time.

Xie An practiced a little selflessly, but he didn't know that the time outside was also flying, and soon it was dusk, and Xie An, who was not disturbed by anyone, had been practicing from opening his eyes in the morning until now, and he didn't feel a little boring, and it seemed that there was nothing else that he could continue to practice like this.

There was a knock on the door, pulling Xie An back from this state of selflessness.

Xie An subconsciously moved his body, and only after feeling a tingling pain did he remember that he couldn't move now, so he gave up the idea of getting up and spoke slowly, for fear that he would touch the tendons not far from the trachea when he spoke.

"Who?"

Xie An's words were weak, indeed, not only did he have severe pain in his muscles and veins, but even today he had no grain of rice or water, of course he would not have much good spirit.

"It's me, are you okay?"

Xue Ming's familiar voice came from outside the door, Xie An heard this voice, and felt a burst of emotion, now at this time, I'm afraid only Xue Ming will care about himself and discover his abnormality.