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Because Zhang Yifan had been participating in the enlightenment when he got the "Nine Yang and Nine Yin Thunder True Formula" before, and he already had some understanding of the true formula, so when he practiced this exercise for the first time, it was quite smooth and he didn't feel much sluggishness.

The residual medicinal power of Zhuji Dan accumulated in Zhang Yifan's body began to be slowly cultivated into mana, and his cultivation was also slowly increasing.

In the evening, Zhang Yifan began to practice part of the Nine Yin exercises again.

In this way, he practiced the Nine Yang Thunder Divine Technique during the day, and the Nine Yin Imperial Thunder True Technique at night. It lasted for more than a month before Zhang Yifan finished refining the residual medicinal power of the Zhuji Pill in his body.

In fact, it would take at least two months for Zhang Yifan to refine the medicinal power of the remnant Zhuji Dan, and the reason why it was advanced was because the strange phenomenon that caused his mana to decrease appeared again.

Zhang Yifan was mentally prepared for this, so he didn't panic too much. And he also knew that in more than ten days, on the night of the full moon, the situation of absorbing his essence and blood would definitely come as promised.

Fortunately, Zhang Yifan, with the help of the residual medicinal power of Zhuji Dan in this month, cultivated both the Nine Yang True Technique and the Nine Yin True Technique to the point of the first layer of Xiaocheng, which can be regarded as an astonishing progress. You must know that even the original Yin and Yang Lay Monk took nearly a year to cultivate the first layer of the True Technique to the realm of Xiaocheng.

This is mainly because Zhang Yifan has been comprehending the true recipe for more than two years, and his understanding of the first layer of the true recipe is already very deep, so the cultivation is twice the result with half the effort, and the efficiency is extremely high. This also provided Zhang Yifan with a cultivation idea. If you want to be fast, you can't reach it, and you don't have the talent for cultivation, but you can understand the cultivation method before starting to cultivate, which can improve the efficiency of cultivation.

After telling Jiu'er and Xiaobai not to disturb himself for the next month, Zhang Yifan took some elixirs from the medicine garden that could nourish essence and blood.

At this time, there was no recovery pill on his body, and he had not practiced alchemy at all over the years, so he could only prepare some elixirs in case of emergency, which was also a matter of no choice.

Previously, Zhang Yifan had been urgently running the exercises to dissipate the medicinal power, so he didn't have a good understanding of the new feeling brought by the promotion to the foundation building period, and at this time, the residual medicinal power of the Zhuji Dan had been completely absorbed, and he had the leisure time to experience it carefully.

After being promoted to the foundation building period, Zhang Yifan felt that the whole person was completely different, as if it was the improvement of the life level, and he was completely out of the mortal womb!

First of all, entering the foundation building period means that the monks can live up to 200 years, and even some monks who are good at cultivation can live longer than 200 years.

The second is that Zhang Yifan's entire body has been greatly strengthened after being promoted to build the foundation, and it has been improved by almost five layers compared to before, which is also where his confidence lies in resisting the absorption of essence and blood by the Demon Gong at that time.

Zhang Yifan's physical body was improved at the same time, his own strength was also greatly improved, at this time he felt that his body was full of strength, almost reaching the power of the Eight Tigers, and the use of the Demon Demon Gong was undoubtedly more powerful.

Of course, the biggest improvement is still in his own mana and divine sense.

After the transformation of the mana in his body from gasification liquid, Zhang Yifan's dantian has formed a mana lake unique to the monks of the foundation building period, and the mana contained in it is no longer the same as that of the qi refining period, and his mana at this time has increased by as much as three times compared to before the promotion.

After being promoted to the foundation building period, Zhang Yifan's divine sense has also more than doubled, plus his own divine consciousness was very strong before, and at this time, the distance of his divine consciousness has reached ten miles, which is comparable to that of ordinary monks in the late stage of foundation building.

Moreover, after entering the foundation building period, he also comprehended a basic divine consciousness supernatural power - divine consciousness transmission, and if he communicates privately with his foundation building period monks in the future, he can use his divine sense to communicate.

In addition, Zhang Yifan's five senses have also improved a lot, and his natural feelings around him are more delicate and clear, and a mysterious feeling begins to brew in his mind. Zhang Yifan knew that this was the beginning of his initial contact with the Tao, and it also meant that he officially embarked on the first step of cultivating immortals, which could be regarded as truly entering the door of cultivating immortals.

Zhang Yifan has a more acute perception of the aura around his body, and he can already absorb the aura through his body all the time and discharge his own dross at the same time, so that he can meet the needs of his body without eating, and truly reach the realm of Bigu, which is also a significant feature of the monks in the foundation building period.

At the same time, he found that his understanding of spells had naturally risen to a new level. Some of the three systems of water, wood, and earth that were obscure to him before could be easily cast at this time, and even the primary and intermediate spells had some comprehension.

As for the gold and fire spells that he was already good at, Zhang Yifan even comprehended the gold system primary high-level spells, the golden archery technique, the fire system primary high-level spells, the fire dragon technique, and the Lianzhu fire bullet technique.

You must know that it took Zhang Yifan less than three days to comprehend these spells, but it took him several months to comprehend them, and the contrast between before and after is really a bit big.

After entering the foundation building period, Zhang Yifan's overall strength has made a qualitative leap, which has increased several times compared with the gas refining period.

At this time, he was full of mana, and his understanding and use of magic weapons was more profound, and he was naturally more handy in using them. Some magic weapons that cannot be fully used during the Qi refining period can exert greater power after they have deep mana support during the foundation building period.

For example, his Fire Jiao Banner, even if it is a fire snake summoned by a regular attack, it is much stronger than the one summoned during the previous Qi refining period. Not to mention that the fire Jiao Banner's stunt turns Jiao into a dragon, and only with the support of mana in the foundation building period can the fire dragon continue to be released to attack the enemy, and truly exert the true power of the Fire Jiao Banner.

At this time, Zhang Yifan was full of confidence, if he faced those fourth- or fifth-level demon beasts again, he could kill them alone, and he would not seek Xiaobai's help as embarrassed as before. Of course, the premise is that there are suitable magic weapons and talismans, and now he has too few means to fight the enemy, and the defensive magic weapons and talismans are basically gone, and it is actually very dangerous for demon beasts above the fourth level.

But what surprised Zhang Yifan the most was the two true tricks attached to "Nine Yang and Nine Yin Imperial Thunder True Technique" - Three Yang Thunder Technique and Yin Thunder Escape Technique, which was revealed by himself after he cultivated the two exercises.

After reading the introduction of the two supernatural spells, Zhang Yifan was overjoyed, and regarded the secret book of "Nine Yang and Nine Yin Imperial Thunder True Recipe" as a treasure, and at this time, the status of this secret book in his mind was second only to the enchanted masterpiece.

The Three Yang Thunder Technique is a Yang attribute intermediate thunder method, which is divided into three levels: primary, medium, and high, corresponding to the three levels of intermediate spells.

The intermediate and beginner-level Three Yang Thunder Technique can stimulate a Yang Gang Thunder at a time, the power is acceptable, and the power can be greatly increased after being quickly activated after cultivation is proficient, and it has a certain restraint effect on ghosts, monsters, and Yin attribute demon beast cultivators.

After cultivating to the intermediate level, the Three Yang Thunder Technique can stimulate three Yang Gang Thunder at one time, and the power is amazing, compared to the initial level, it is not a little bit higher.

As for cultivating to a high level, it is even more incredible, the three Yang Gang Thunders directly turned into a Great Yang Gang Thunder, and it was almost instantaneous, and the power was comparable to the usual blow of a Jindan stage monk.

As for the Yin Thunder Escape Technique, as the name suggests, it is a kind of Escape Technique, which is a technique that induces the Yin Thunder to move quickly, which is similar to the effect of the Ziyan Escape Talisman that Zhang Yifan used before. Mastering this technique, whether it is attacking or escaping, Zhang Yifan has already tasted the sweetness of Yan Dun, so he can't help but feel a fire in his heart.

The Yin Thunder Escape Technique is an intermediate retreat method, which is also divided into three levels. The distance that the beginner Yin Thunder Escape can walk at one time is 10 zhang, the intermediate level is 30 zhang, and the high level is an astonishing distance of 100 zhang.

In fact, whether it is the fire escape that Zhang Yifan used with the talisman before or the Yin Thunder escape he sees now, these are actually not escape techniques in the real sense, but just a fast-moving technique.

The real escape technique contains a trace of the application of the law of space, which can appear from one place out of thin air to another, which belongs to the category of supernatural powers, and only the rumored Yuan Infant Stage monks can comprehend one or two, which is far from being accessible to Zhang Yifan at present.

But even so, Zhang Yifan is very satisfied. You must know that the exercises that can be practiced in the foundation building period can be described as rare, and even many Jindan monks have not been able to cultivate the retreat method, first, it is difficult to cultivate, and second, the exercises are scarce. What's more, this is a more scarce thunder escape technique, and Zhang Yifan is very happy.

Get two true spells, so that Zhang Yifan is like a treasure.

But he couldn't help but have some doubts in his heart, these two spells could not be found in the Jiuyang Imperial Thunder True Recipe Fragment and the Nine Yin Imperial Thunder True Recipe single book.

There are only some ordinary yang attribute thunder methods in the remnants of the Jiuyang Imperial Thunder True Technique, and there is no Sanyang Thunder Technique, which Zhang Yifan is very sure of. If he knew that it was accompanied by a spell like the Three Yang Thunder Technique, Burning Sky Valley would not classify it as an ordinary exercise, so Zhang Yifan took out the original version without paying attention to it.

As for the Nine Yin Imperial Thunder True Technique, it is the same, there is no introduction to the Yin Thunder Escape Method at all, and there are only some ordinary Yin Attribute Thunder Methods, and it is only above the fourth layer that some powerful Yin Attribute Thunder Methods and even Yin Thunder Divine Powers begin to appear, but there is no introduction to the Yin Thunder Escape Method throughout the article.

After thinking about it for a long time, Zhang Yifan didn't know why, and could only guess that maybe it was some changes caused by the merger of the two cheats.

Zhang Yifan didn't plan to delve into it, and decided that it was enough to work hard to cultivate this true technique. It's just that the Jiuyang True Thunder Recipe only has four layers, so he began to suffer some gains and losses, and began to think about whether he would inquire about the situation of this exercise in the valley when he returned to the valley, and strive to find the lost part of the Jiuyang Imperial Thunder True Technique before he entered the Jindan period.

After thinking about it for a long time, Zhang Yifan fell into distress, in the vast world of cultivating immortals, where to find this without any clues?