After hearing such words, Xiahou Yu was also stunned. He thought that he had taught Zhang Sihan the alchemy and had to report his father and grandfather. Now, when he heard Zhang Changzong's question, his mind suddenly changed. Zhang Sihan seemed to have not said this in order to protect himself. He was moved and knew that he had said the wrong thing. However, at this time, he had to fire the arrow, so he had to speak, "Is it bragging? The eldest lady will tell you if you ask me."

Seeing Xiahou Yu's confident expression, Zhang Changzong looked up and shouted outside the house, "Where is the person coming, Han'er calls me here."

However, in a flash, Zhang Sihan came to the lobby again with a sloppy look. After calling out to his grandfather and father, he looked at the elegant Xiahou Yu in surprise.

"Han'er, grandpa asked you, this kid said that he had the ability to refine alchemy and had an 80% success rate, but it was true."

Zhang Sihan couldn't help but feel anxious when he heard the question, because he was well aware of his grandfather's way of dealing with things. If his grandfather knew about Xiahou Yu's ability, he might end up miserably. While he was hesitating whether to tell the truth, Xiahou Yu bowed to him.

"Miss, Zhang Jiahe is now at the critical moment of life and death. I have to force you to tell the truth. You just need to tell your grandfather the truth."

Zhang Sihan didn't know what Xiahou Yu sold in the gourd, but he also knew the situation in front of him. Only by increasing the weight on Xiahou Yu could he save his life, so he nodded.

"Grandpa, what this fellow Xiahou said is true. Although he is only in the late stage of foundation building, he possesses the amazing alchemy technique, and the rate of elixir production is 80% of it. It is just a humble statement. I saw with my own eyes that he had refined the elixirs used in the Five Furnace Foundation Building stage, but none of them failed. It was unprecedented."

"No of the five furnaces of elixirs failed? This~ how is this possible!" Zhang Sihan's words immediately subverted Zhang Changzong's thinking.

"There is no need for a granddaughter to lie and help outsiders deceive grandfather. If you don't believe it, just ask fellow Daoist Xiahou to go to the alchemy room. Once you show your skills, grandfather will know that his granddaughter is not talking nonsense."

After listening to Zhang Sihan's words, Zhang Changzong recalled Xiahou Yu's proposal before and fell into deep thought. The biggest reliance of his Zhang family was nothing more than the elixir recipe of Yuanyang Dan. The elixir recipe he had studied for many years was only two or three levels. If he could really increase the elixir rate to eight or even ten levels, the benefits were simply unimaginable. Even if he sold the elixir recipe to all forces in the world, as long as his Zhang family could guarantee a higher-level elixir yield rate, the market competitiveness would inevitably increase greatly by then. He only needed to suppress this price, and the Yuanyang Dan refined by other forces would inevitably have no room for survival. With such a support from his Zhang family, wouldn't he still be able to maintain his eternal foundation without ruining it?

With excitement, he stood up and grabbed Xiahou Yu, and took him into the alchemy room without saying a word.

After some requests, Xiahou Yu naturally asked for a few portions of medicinal materials as he said, and then refined five furnaces of Taixuan Pills in one breath. Perhaps because of nervousness, a furnace of elixirs had some troubles when controlling the fire, causing a furnace of good medicinal materials to turn into coke.

When Zhang Changzong looked at Xiahou Yu's magical means he had never seen before, he couldn't help but be amazed and even more frightened to discover that there were really people in the world who could increase the success rate of alchemy to more than 80%. He was happy and thought that his Zhang family was saved.

He grabbed Xiahou Yu's shoulder again and said with excitement: "As long as you can help me overcome such difficulties in the Zhang family, I will definitely not treat you badly, old man."

Xiahou Yu sneered at the corner of his mouth.

"Senior, the alchemy technique I have been creating throughout my life. Although the master did not set a ban before his death, I also know the reason why it is guilty to possess a treasure. I can guarantee that I have passed on the teachings of what I have learned throughout my life and that I need you to make a vow to ensure that the entire Zhang family will not touch any of my fingers from now on, otherwise it will be difficult to have a good end."

Zhang Changzong's eyes condensed and he said coldly: "Boy, dare you threaten me?"

"It's not a threat, but I'm a Paul."

"Aren't you afraid that I will kill you?" Zhang Changzong spoke coldly.

"Absolutely, I'm afraid, but aren't you afraid of killing me and not getting my alchemy skills? I know that you have no means of being a god-transforming monk, but you have to consider it. If you get a fuck, no one will get the benefits. The boy is only alive and dies, but I don't know what your huge family population is?"

Zhang Changzong suddenly burst into laughter.

"Hahahaha,! The boy is so brave. A mere foundation-building monk who can talk to me in front of me can threaten my success. You are the first one."

As soon as he fell, he bit his fingertips. After a drop of red blood appeared, Zhang Changzong's fingers guided him to empty his penis, and then he pointed to the sky and said, "I, Zhang Changzong, here to point to the sky and make a vow. As long as Xiahou Yu can hand over the alchemy technique to help my Zhang family get rid of the crisis, the entire Zhang family will definitely regard him as his benefactor from now on, and dare not harm him at all. If you violate this oath, the heaven and earth will abandon it."

As soon as these words were said, a dark will in the world suddenly emitted an invisible aura. After everyone present felt it, they knew that this was the recognition of the great monk's oath by the way of heaven. In this way, the oath was also established. As one of the exclusive skills of monks above Nascent Soul, this oath was made to this world with his own bloodline. If you dare to violate it in the future, even if the evil result may not appear immediately, there will definitely be no good result. Therefore, for monks above Nascent Soul, the oath should not be easily expressed.

After seeing Zhang Changzong complete the oath, Xiahou Yu nodded and expressed his approval.

"Boy, I have already made an oath at your request. Do you know what to do?"

"Of course I won't go back on my word. Let's call the eldest lady here. I will naturally teach him all my life's learning."

"I am looking forward to your methods, but the crisis of my Wei Zhang family is right in front of me, but I don't know how long it will take for my granddaughter to learn your methods?"

"Are you talking about mass-producing Yuanyang Dan?"

“Naturally.”

"Please take a look at the elixir recipe with me." Xiahou Yu said pretending.

After hearing this, Zhang Changzong hesitated for a while and immediately made up his mind that if this kid dared to make a fool, he would definitely not be able to escape his palm. He touched the storage bag with his palm, and after a jade slip appeared, he threw it towards Xiahou Yu.

After watching it in a pretentious manner, Xiahou Yu frowned and thought for a long time.

"I didn't expect that the recipe of Yuanyang Pill is so complicated. If the materials are sufficient in March, I will guarantee that the success rate of the eldest lady's Yuanyang Pill will reach more than 60% within March."

"Okay, this is enough with you. I will supply you with the materials of Yuanyang Dan. If there is no result in March, you should know my methods."

"Please rest assured about everything, but I have something to say first. In these three months, no matter how many Yuanyang pills I have refined, I will take half of them as a reward. If you are willing, then I will call the eldest lady over and we will start now."

"As long as you can have a 60% elixir rate, that's all a little bit." After Zhang Changzong finished speaking, he called Zhang Sihan and ordered several Jindan monks to guard the alchemy room. After carefully guarding the alchemy room, he waved his sleeves and left.

In the following days, Xiahou Yu naturally immersed in the development of the pill recipe with Zhang Sihan, and Zhang Changzong, the ancestor of the Zhang family, was even more busy. He first found Yuan Xuzi in a hurry, threw out the Yuanyang pill recipe as bait, and exchanged a huge reward of 200 million spirit stones from the alchemist alliance. He also signed a treaty for the offensive and defensive alliance with the alchemist alliance, which made the alchemist alliance promise to protect the Zhang family forever.

He also took the Dan recipe to find Wu Changshu. After begging for mercy, he even agreed to use the Yuanyang Dan recipe to compensate Huang Tingzong for the losses. The three elders of Huang Tingzong smiled and repeatedly ensured that the Zhang family's power would not be invaded by outsiders.

In order to maximize profits, Zhang Changzong naturally used all means. While the matter of Yuanyang Dan was not exposed, he secretly contacted the major forces in the world. No matter whether good or evil, as long as he was willing to bid, he would sell the pill recipe at a good price. He made a fortune for a while, earning as much as ten billion in spiritual stones, which was several times more profitable than the entire Zhang family's business for thousands of years.
Chapter completed!