This direction is to exert the original effect of Neitsadan and remove the side effects, and the other direction is to maintain the side effects, but for a long time, to meet the needs of long-term practice.

Speaking of which, the first modification should not be too difficult, there are many ways to shield the external senses, and some medicinal materials with anesthetic effects can be added to meet the requirements. Of course, what to add and how much to dosage still need further evidence and experiments by Yang Chen.

On the other hand, it is a bit difficult to extend the time. Yang Chen was about to carefully analyze which medicinal materials in the Neicha Dan Pill were used to control the duration of the medicinal effect, when he suddenly found that the situation around him was different, and when he raised his head, he saw that several wives and concubines present at his house were all around him, and several pairs of beautiful eyes were staring at him without blinking, and there were bursts of strange light flashing in their eyes.

Yang Chen subconsciously thought that there was something wrong with him, and after looking down for a while, he realized that there was nothing. The women who looked up at them suspiciously, puzzled.

"Xianggong, what did you just take the Fifth Turn Neichadan?" Sun Qingxue's question interrupted Yang Chen's speculation. Xiao Nizi's eyes were full of admiration, staring at Yang Chen as if she was staring at some big hero.

What is there to hide from his wife, Yang Chen nodded and admitted Sun Qingxue's guess. He nodded, and suddenly made all the women around him give some incredible "ah".

In the process of Yang Chen's continuous swallowing of the pill to cultivate, all the women had already endured the power of the three turns of the Inner Cha Dan once. Without exception, all of them fainted. Even Shi Shanshan and Tao Junqi, who swallowed it for the second time, were no exception.

This time, because Yang Chen was indulged in cultivation and didn't care about taking care of them, all the women slowly woke up after the effect of the medicine had passed for a long time. Savoring the pain just now, it's like going to hell once.

Then they immediately discovered that Yang Chen was eating Nechadan one after another. Judging from the dragon-shaped Dan pattern above, Yang Chen ate the four-turn Inner Chadan. After a long while, the elixir turned into the Fifth Turning Neichadan.

The women who discovered this scene were almost stunned. After three turns, they couldn't bear it, they couldn't even take a dozen breaths, they all fainted, but their own husband didn't feel it, even eating so much, and it was a higher-grade Neichadan. The pain is ten times more than a hundredfold, is it impossible to beat the body of the prince?

Gao Yuegong Sun Ling and the others had already seen Yang Chen's power, but Tao Junqi and the others had not fully comprehended it. After this, the women re-acquainted themselves with their father-in-law. It seems that this husband of his own family. It's not just a five-rank alchemist.

Yang Chen's feeling for his concubine has always been knowledgeable, excellent in alchemy, and calm in trouble, and now he has to add another one, which can endure what ordinary people can't bear, but they haven't had a chance to see Yang Chen's real hands. I don't know what Yang Chen's combat effectiveness is. However, since they can retreat from the Demon Continent, they will not be worse than Gao Yue and the others.

After the women calmed down, Yang Chen talked to the women about his idea of transforming the Neicha Dan Fang. For this, the women naturally agreed with both hands. Great support.

Tao Junqi single-handedly took care of the task of cleaning up the pure yin true fire. In fact, up to now, she has successfully opened a path of half a zhang wide on the fire ground, and in a few more years, even the pure yin true fire cannot be completely removed. Everyone can also enter the hall by this path.

Yang Chen referred to a lot of pharmacological common sense, and learned a lot of experience from the "Laojun Dan Sutra", "Yun Dan Sutra" and the refining experience of those predecessors. Experiments with the modification of the Netsaidan formula began.

On the basis of the original Dan prescription, Yang Chen added a thousand-year-old mandala and several kinds of neutralizing auxiliary medicinal materials, after several tests, the timing and heat of adding were determined, and soon, in less than two months, a furnace of modified second-turn Neichadan was easily baked.

Testing the efficacy of the pill, of course, is Yang Chen himself, he will not let his women suffer. After taking this brand-new Neichadan, Yang Chen slowly realized the change in the efficacy of the medicine.

As Yang Chen expected, after adding the mandala with anesthetic ingredients, the external senses and pain sensations were greatly reduced, but the original effect of detecting qi and blood was not lost, and Yang Chen could still feel it clearly.

It can be said that this trial has been largely successful. If I have to say that there is a flaw, it is that the dose of mandala is still a little small, and there are still some abnormal feelings. Yang Chen's ideal effect is to be able to maintain normal senses, not to be completely anesthetized, and not to have more than ordinary pain, that is perfect.

Of course, an ideal is an ideal, and there can be no perfect elixir in reality. At the same time, everyone's tolerance is also different, some people only need a small amount of mandala to anesthetize, some people need a large dose to do, and so on, it is impossible to satisfy everyone perfectly.

After adjusting the dosage a little and adding almost five more points of mandala, Yang Chen began the formal refining. This time, Yang Chen went directly to the third and fourth turns of refining. For their own wives and concubines, the third and fourth transformations are already fully able to meet their requirements, and the five-turn refining system is not necessary at all.

The Inner Chadan of the Five Turns, even if they discovered the subtle improprieties of the operation of qi and blood, with their current realm, it was impossible to adjust it, and it would only be possible after they had reached the level of cultivation of at least the five grades of human immortals.

In the blink of an eye, it was another year, and Yang Chen finally completed the refining of the Fourth Turning Inner Chadan. Yang Chen gave a new name to this brand-new Neicha Dan with an added anesthetic component, Qi and Blood Pill, and its main role is to explore the flow of qi and blood in the body.

The wives and concubines were all there, and even the Murong sisters and Shi Wushuang, who were supposed to take turns to train outside, were also there, and the time was just right. After Yang Chen took out the Qi and Blood Pill and distributed it to the women, the Third Turn Qi and Blood Pill was immediately taken by the anxious women, and no one was worried about the pill that his father-in-law had personally tested. Everyone wants to know how effective the improved pill is.

Without the improvement of external senses, without the stimulation of pain, and with wholehearted attention to the operation of qi and blood, the women can finally thoroughly understand the operation of qi and blood in their bodies.

Soon, Sun Qingxue, who had the highest cultivation among the four wives, had a change, and after discovering some small flaws in the circulation of qi and blood in his body, Gongsun Ling corrected these flaws as quickly as possible. The effect was immediate, and Gongsun Ling's cultivation improved slightly in an instant.