Recasting the meridians in vitro is naturally not a simple matter, Chu Feng has already been prepared for countless failures and even complete failures, after all, if this road can be walked through so easily, then so many smart people in ancient times, I am afraid that this road has already been passed.

Chu Feng's face was solemn, and he continued to reconstruct a new meridian diagram and constantly guide his blood qi into the new main formation to test.

Outside the body and inside are two completely different concepts, so the meridian circuit of the Blood Demon Sutra in his body can only play a certain role in reference.

In fact, the circuits of this meridian didn't even have the effect of borrowing, because every time the blood flow entered the outer meridian, it ended in failure.

However, Chu Feng did not have the slightest change in his expression, he just did everything silently, feeling the reaction of the formation itself every time he introduced blood qi into it, and constantly found new inspiration and new directions from the summary of failures.

He had been brewing this method long enough, so he didn't have the slightest jerky hindrance in doing it, and as the number of failures increased, some of the methods he thought were quickly rejected, and the options left to him were rapidly reduced, and his reflexes became more and more agile, and the time that the main formation could hold on to naturally became longer and longer.

Chu Feng didn't know how much time had passed, he just threw himself into it, projecting the meridians in his body to the heavens and the earth, and replacing them with the meridians outside his body.

When Chu Feng finally carefully completed a complete cycle, Chu Feng's breathing stagnated for a long time.

Chu Feng silently looked at the blood qi in front of him that was slowly circulating in the formation according to the prescribed line, and between his eyebrows, he finally showed a thousand joys.

This was the first time since he had seen the joy between Chu Feng's eyebrows in three days, and on the face that looked a little haggard because of the excessive consumption of his mind, a pair of eyes burst out with countless lights at this moment.

Liwan knew that Chu Feng had succeeded, but she still didn't bother, just stood silently aside, waiting for Chu Feng's orders.

Chu Feng never spoke, just looked at everything in front of him in silence.

He knew that he had taken the most difficult and important step, in order to take this step, the amount of Precious Spirit Stones he had consumed in the past few days had reached an appalling amount, even a big faction might not be able to support such an expense - not to mention, in order to maintain his spirit and repair his injuries, he had also swallowed a large amount of pills, and the pills that Nangong Yun handed over to him had almost been completely swallowed by him.

Rao is like this, he has almost reached a critical point, if it were not for a strong will, I am afraid that he would have collapsed.

But Chu Feng knew that all this was not enough.

Although the current formation has been able to provide power for the operation of the blood qi trapped in it, it also needs external power to force the blood qi circulation - in other words, this circulation of blood qi is not autonomous, but needs an external source as the driving force.

Although this achievement still has an extremely huge gap for the blood qi autonomous circulation that Chu Feng really wants to achieve, for the current situation, it has also reached the point where it can be practical.

Chu Feng knew that the current level was probably his limit, all his thoughts had been exhausted, and no matter how hard he persisted, he would definitely not gain anything new, just let his spirit collapse.

Chu Feng took a deep breath again and slowly stopped his thoughts, causing the formation to fall into a situation where no one was hosting. That formation lost Chu Feng's presiding, but it did not change in the slightest, and continued to run silently.

As soon as Chu Feng's spirit relaxed, he immediately noticed the exhaustion all over his body, and the whole person seemed to have lost all support, and fell softly to the side.

Liwan was taken aback, supported Chu Feng, hugged Chu Feng and surfaced, put Chu Feng on the shore, fed Chu Feng to swallow the pill, and tried Chu Feng's meridians, and found that Chu Feng was just not in good spirits, but there was no injury, so he breathed a sigh of relief.

Chu Feng lay on the shore for a long time before he breathed a sigh of relief, sat up, and said a little weakly: "What about Sister Yun and Zhiqi?"

With Nangong Yun's cultivation, it is estimated that the blood and qi strength that can be used is more than enough for three days, and how long Bing Zhiqi can polish the Singing Snow Technique to the limit of his current cultivation is a difficult thing to say.

"Sister Yun is protecting Ah Qi to lock Longtan, and Ah Qi is going to re-understand and sing the snow trick. Liwan replied.

Chu Feng couldn't help but be stunned again, he didn't expect Bing Zhiqi to polish his snow singing trick to the limit so quickly, not only that, but he also had to go to the lock dragon pool to feel the traces left by those snow emperors, and re-understand the snow trick.

However, Bing Zhiqi does need to re-understand the snow trick, after all, ...... Although the snow singing recipe that Chu Feng passed on to Bing Zhiqi was a complete snow singing technique, after all, it was Chu Feng's singing snow trick that was pushed back according to the operation of the meridians in his body, and whether it was the correct meridian circuit of singing snow tricks remained to be verified.

However, it was naturally a good thing that Nangong Yun and Bing Zhiqi were busy with their affairs for a while, and Chu Feng also happened to get a chance to breathe, chatting with Lijuan and asking about Lijuan's current situation while recuperating his spirit.

Chu Feng and Lijuan waited from the afternoon until dusk, and the smiling Nangong Yun came back with the expressionless Bing Zhiqi.

As soon as Nangong Yun saw Chu Feng, he couldn't help but let out a loud "yo" and whistled loudly before saying, "The little madman is done?"

Chu Feng pondered for a moment and nodded slowly but forcefully, but added: "However, an additional formation is needed to force the blood qi to operate, and then the blood qi will provide the power of the next formation, and then compete with each other." ”

Hearing this, Nangong Yun couldn't help but ponder for a moment before saying, "Is that a heavy formation or a formation formation?"

Heavy formation is a mixture of multiple formations, the formations are related to each other, can occur at the same time, or alone, but because the source of power is stable and unique, so when multiple attacks, the power of each formation will inevitably be reduced.

The formation of a formation is to arrange multiple formations separately, set their own energy, and some associations will also be set between the formations, and they can also be multiple or single. Since each formation has its own energy source, the power of each formation is fixed no matter when it occurs.

Although the multiple powers of the heavy array are not as good as the formation array, the heavy formation is more difficult to do than the formation array, because the multiple formations between the heavy formations are fused together, just like two pools of molten iron mixed together after being completely burned and melted, they are not separated from each other at all, and they are generally extremely complex and difficult to crack, and they can be sent and received at will, which will be much easier for those who operate the formation.

In the formation of the formation, the connection between the various formations is not so close, and no matter how high the attainment is, it only makes the connection between the two formations like welding, and ordinary people are just like tying up two iron rods with a rope, and the cooperation between the formation and the formation is not so close, and it is easy to cut off, and the loopholes are too big.

Especially in actual combat, there is a limit to the aura that can be invoked in any one place.

If you use a heavy formation, you can gather all the aura into a single formation, while with a group array, you need to redivide the aura, so that the power of a single array is greatly reduced than theoretically.

At this moment, using a formation formation is undoubtedly the easiest option - because they only need an additional formation that forces the blood qi to operate, and the next level of formation is supported by blood qi, so whether it is a formation formation or a heavy formation, the effect is the same.

And the opponent they have to deal with is not a creature who knows how to break the formation, so whether the connection between the formations is close or not is not so important.

Having said that, according to Nangong Yun's temperament, she still wanted to choose a heavy formation, but she was afraid that the matter of forming a heavy formation again would still fall on Chu Feng's head.

But at this moment, Chu Feng doesn't look much different from a dying person, if Chu Feng is asked to bear such a heavy workload, she is still a little reluctant after all, but she still has some doubts in her heart, so she asks such a question.

Chu Feng was silent for a moment before he said very seriously: "Heavy formation." ”

Nangong Yun couldn't help but feel a little ashamed when he heard this, and said, "Why don't you rest for a few days first, our time ......"

Chu Feng shook his head and said, "These days, while I am thinking about the formation, I am thinking about another issue. ”

Nangong Yun didn't speak, just looked at Chu Feng and waited for Chu Feng to continue.

Of course, Chu Feng is not a person who likes to sell guanzi, the reason why he paused was because he really needed to take a breath, and when he took a breath, Chu Feng continued: "Why should that person just plot against you - with his ability, it would be easy to kill you, right?"

Nangong Yun didn't speak, she kept thinking about this question.

Of course, she already had her answer, so when Chu Feng said this question at this moment, the smile on Nangong Yun's face couldn't help but retract in an instant, because she really didn't have the capital to smile again.

"Plotting against you, but not killing you, naturally has his purpose. Chu Feng paused, then hoarsely voiced, suppressed a tremor in his voice, and said, "This purpose is probably to keep you here." What's in it for him to keep you here, or rather...... He can plot against you so easily, so why should he keep you here for his purposes?"

Nangong Yun did not answer.

Liwan couldn't help but think for a while, and pondered for a long time before breaking the silence and saying, "Because Sister Yun can do things that that person can't do." ”

"So, what is this matter?" Chu Feng asked rhetorically.

Nangong Yun still didn't speak, Bing Zhiqi still didn't have the slightest interest in such a thing, he just remained silent, only Liwan was cooperating with Chu Feng's train of thought, and after thinking for a while, he said with a shocked face: "Isn't that what we're doing now?"