Xin'er was practicing, and Cheng Yu didn't bother her, but began to teach Coco alchemy.

Although Coco's Yuan Ling Pill Body was the most suitable person to become an alchemist, no matter how good the conditions she had, she still had to start with the basics.

And as an alchemist, the most basic thing is to be able to recognize the world's medicinal herbs. Of course, it is not practical to really know all the medicinal herbs in the world.

But no matter what, most of the herbs need to be kept in mind. Only by knowing the effects of various herbs can we refine good elixirs.

In fact, the formula of many pills is not single, and the same pill can be refined by using different herbs, but the effect will be different, so as long as you understand the properties of the herb and the pill formula, a powerful pill master can rely on his understanding of the pill to constantly update the formula, and even create new formulas and refine new pills by himself.

Therefore, Cheng Yu first prepared a large collection of herbs for Cocoa, and asked her to write down the various attributes of these herbs, as well as the growth environment and habits.

Cheng Yu is wholeheartedly determined to bring out the alchemy of cocoa, so he is not in a hurry, he must cultivate cocoa well, and the foundation must be solid.

After arranging Coco, Cheng Yu slipped into the Immortal Demon Tower alone.

The Realm Extermination Technique has only just begun to be successfully cracked, and there are still dozens of runes to be cracked. So, while Chen Hongyuan and Ji Yun hadn't come back yet, Cheng Yu taught Xin'er to practice and cocoa alchemy at the same time, while he kept cracking the formation.

With the continuous understanding of the formations, Cheng Yu's cracking speed of each rune's array is getting faster and faster, at first it was one for two people, slowly one a day, and now it is several pieces a day.

The Binding Realm Extermination Technique had a total of forty-nine runes, and with Cheng Yu's unremitting efforts every day, all the runes were finally cracked after thirteen days.

When all the runes were successfully cracked, Cheng Yu was excited. For him, this formation is too important, and it is related to his victory or defeat against the enemy.

With his current strength, he can already compete with a master in the middle stage of merging, but with the help of the extermination technique, he can completely kill a master in the late stage of merging, what a shocking thing.

Seeing that the forty-nine runes were completely activated by him, floating around him, Cheng Yu really wanted to find a master in the late stage of the merger to give it a try. But he knows very well that this is his biggest hole card, and it is not easy to leak it before the critical moment, so he can only try to suppress the throbbing in his heart.

Cheng Yu took back the rune and was about to go to the mountains and rivers to see Xin'er and Coco, when there was a knock on the door outside his house!

"Family Master, Young Master Hong and Young Master Yun are back and are waiting for you in the living room!" came a disciple's voice outside.

Chen Hongyuan and Ji Yun have been living in the mountains as early as the day the Cheng family was established, so many disciples know the two of them, and they all know that the two are friends of the head of the family, so everyone is very polite to the two.

"Got it, let them sit down for a while, and I'll come out right away!" Cheng Yu was overjoyed, he didn't expect the two of them to come back before the January period arrived, it seems that they are really interested in this matter.

I don't know if they succeeded in persuading their head of the family to agree to their terms, but they came back so soon, presumably things should have gone smoothly.

Cheng Yu tidied up his robe, and then walked out of the room.

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"Brother Cheng, congratulations!" As soon as Cheng Yu walked into the living room, Chen Hongyuan stood up and smiled.

"Hehe, the two brothers have worked hard, but I don't know where this joy comes from?" Cheng Yu said with a smile.

"Of course, we lived up to our expectations and completed your original task?" Ji Yun said with a smile.

"So the two heads of the family agreed?" Although I had such a premonition in my heart, I couldn't help but be excited when I got the affirmation of the two people.

Although the formation of the extermination technique is powerful, it cannot be used casually, so for the time being, their Cheng family only has masters in the early stage of Mahayana, and it will be very troublesome to encounter masters in the middle and late stages of Mahayana.

Now that the Chen Ji family has brought a large number of masters, there is not much gap between them and Kunlun at the level of masters!

"Of course, brother, this time we really took a lot of words, so that the head of the family agreed to these three conditions, do you have to give us some compensation!" Ji Yun said with a smile.

"Haha, the two brothers did me a great favor this time. But we said it well, I'll raise your realm, and you can help me get this done. Now that you have completed our original agreement, how can you compensate me again? Are you treating me as a wronged man?" Cheng Yu said with a smile.

Chen Ji and his family agreed to his three conditions, which is indeed a happy thing for him.

"Hehe, having said that, but Brother Cheng, you don't know that we really worked hard to convince the family master this time. We have no credit and hard work, shouldn't you give us some compensation?" Chen Hongyuan said with a smile.

"It's okay for you to coax others with these words, you're going to show your IQ in front of me, do you think I'll believe you? Let's talk about how many people you brought this time!" Cheng Yu didn't believe these two guys.

Although he put forward three conditions, he was fully confident that the two of them would agree to these three conditions. Because the mere fact that he wanted to improve the strength of their family's masters was enough for them to meet their own conditions.

Although the Ji Chen family is a very old family, it does not mean that they have the ability to improve the strength of their disciples casually. Their family was able to have so many masters, and it was all accumulated little by little over time.

How can he be like Cheng Yu, as long as the time is ripe, he can create masters batch by batch, what a terrifying thing.

Now that Cheng Yu is willing to quickly cultivate a group of masters for the two of them, how could they refuse such a good thing? However, he believes that since the Ji and Chen families have agreed to his three conditions, they will definitely send more people to the Cheng family to let him improve their strength.

"This....... Hehe, maybe there are a little more people than we thought before, Brother Cheng, this should be no problem, right?" At this time, Chen Hongyuan and Ji Yun were a little embarrassed.

Because before, they just thought that they could bring some masters in the family who had encountered bottlenecks and let Cheng Yu improve. And they really didn't lie, they did spend a lot of effort to persuade their family to agree to Cheng Yu's conditions.

And the only condition put forward by the two heads of the family was to bring more people to promote him, and it seemed that they also knew how much impact this matter had on the two families.

"Let's talk about it, if it's too much, I may have to reconsider our partnership!" Cheng Yu said with a light smile.

Actually, for him, it doesn't matter if there are many people on the other side, but he can't let others know that he can really easily improve the strength of so many people, which is not a good thing for him.

"Our Chen family has brought a total of 100 people this time!" Chen Hongyuan's face suddenly turned red, and he looked at Cheng Yu with some embarrassment.

Cheng Yu didn't have any expression, but looked at Ji Yun again!

"Our Ji family has also gathered a hundred people!" Ji Yun smiled awkwardly.

"Two hundred! You two really look up to me, do you think of me as a master maker?" Cheng Yu said as he looked at the two of them.

These two are really good at calculus, and they want to help them create a master of a hundred people at once, and they are really treacherous!

"Hehe, Brother Cheng, didn't you also raise the realm of more than one hundred and fifty people last time, I believe that there should be no problem with these two hundred people, right?" the two said with a smile.

"If I'm not mistaken, I'm afraid you are not bragging in front of your family master!" Cheng Yu said.

"Haha.......! A little bit, just a little bit of blowing!" Ji Yun laughed, hiding his embarrassment.

They did brag for Cheng Yu in front of the people of the family, saying how high his talent was, how outstanding his strength was, and even improved the realm of two hundred people at once.

It was precisely because of this that their head of the family felt that it would be too cost-effective to send only one or twenty masters to him.

Moreover, they originally planned to send two hundred people directly, after all, he had already said that Cheng Yu could directly improve the realm of two hundred people. This frightened them, and they quickly continued to lobby, which allowed everyone to reduce the number to 100.

Otherwise, if they brought two hundred people to Cheng's house, they really didn't know how to speak!

"You really took a lot of trouble to trick me!" Cheng Yu snorted.

"Hehe, Brother Cheng, don't say it so ugly, our family master also said, you can choose some of these masters at will to guard the Cheng family!, but ......." Chen Hongyuan said with a smile.

"But there are still conditions, isn't it?" Cheng Yu said angrily, these old guys are really not so easy to deal with, if you want to take advantage of them, there is no way!

"Brother Cheng, don't worry, in fact, this is not a bad thing, what our head of the family means is that we hope we can reach a long-term cooperation. You have improved the realm for us, and we can send masters to guard the Cheng family for a long time! In this way, we can be said to be mutually beneficial, Brother Cheng, what do you think?" Chen Hongyuan said.

"Brother Ji, you think the same way?" Cheng Yu looked at Ji Yun.

"Yes, Brother Cheng, we all know that you are now plagued by the troubles of Kunlun and Xuantian Sect. We will not directly intervene in the contradictions and conflicts between you, but we can guarantee the safety of the Cheng family for you, so that you have no worries, what do you think?" Ji Yun nodded and said.