"What the hell are you doing here?" Liu Lei covered his nose with palpitations, and asked angrily.

"You can put your hands down quickly, you think that the things my old man made are all low-grade products, this thing doesn't have any smell, what's the use of you covering your nose", Old Man Li said with a disdainful glance at Liu Lei.

"Don't lie to me, I smelled that just now, and my stomach was about to smoke out" Liu Lei didn't believe Old Man Li's words at all.

"Don't learn no skills, don't learn no skills" Old man Li listened to Liu Lei's words, stood up and poked Liu Lei's head with his fingers and said, "Don't you know what volatilization is?" This thing has no smell until it enters the body of the creature, it will have an effect, and it will soon lose its effect when it is emitted into the air. ”

Well, Liu Lei really didn't know that the Mixed Yuan Continent also had the term volatilization, so he took his hand away and sniffed it cautiously, and there was indeed no disgusting smell in the development air.

Liu Lei suddenly said angrily: "You unlucky old man, then you just let me smell hard against the mouth of the bottle, are you sincere?" ”

"Yes! What are you doing? Old man Li tilted his head and said defiantly.

"I ...... I ......" Liu Lei was suddenly angry, but now he has a request for others, and he doesn't dare to say cruel words for a while.

"This is for you" Old man Li was obviously very proud of Liu Lei's reaction, and threw the bottle containing the green liquid into Liu Lei's hand, and Liu Lei caught it in a hurry.

"Old man, why are you giving me this?" Liu Lei asked curiously.

Old man Li: "Aren't you going to clean up the beasts in the valley?" Here's how! ”

"What are you going to do with this?" Liu Lei took the bottle and carefully examined the liquid inside.

Old man Li straightened his messy hair and said indifferently, "Didn't you say that there was a small river in the valley one day?" But put this thing in it, that river is the place where the beasts in the whole valley drink water, put my medicine in the river water, the whole river water will be polluted, I will prepare some for you later, you will find someone to poison it tonight, the river water cannot be drunk, it is estimated that in three days there will be less than half of the animals inside! ”

Liu Lei listened to Old Man Li's idea, and his heart trembled, if this old man was on Earth, he would obviously be a terrorist who poisoned him.

"Old man, aren't you kidding me? No matter how small the river is, it's still a river, and how much medicine does it have to flow, besides, after you get poisoned, we won't be able to use it in the future." Liu Lei said dissatisfiedly.

Old man Li glanced at him, and said confidently: "Don't worry, my medicine is very powerful, don't look at it as little as a drop is enough to pollute a pond, and it is not fatal, and it will save the valley when the time comes, and the effect of the medicine will only be three days, and it will be diluted after three days." ”

After speaking, Old Man Li glanced at Liu Lei, and said impatiently, "Do you want it?" Don't pull it down, don't bother me, I still have to continue to configure it, this one medicine is not enough, if you want to get the valley without fail, come and help me. ”

"Yes! Want! The doubts in his heart were dispelled, and Liu Lei hurriedly agreed, Liu Lei still trusted what Old Man Li said, and if this mysterious old man harmed him, it would not benefit him at all.

Seeing that Liu Lei agreed, Old Man Li lowered his head and got busy again, Liu Lei put the medicine bottle on the table, and hurriedly came to give Old Man Li a hand, although he was not a pharmacy major in his previous life, and he didn't know about the Mixed Yuan Continent Pharmacy in this life, but in his previous life, at least he had some foundation in chemical experiments.

"Well, grind this rotten grass into powder for me," said Old Man Li as he handed Liu Lei a plant like a dead twig.

Liu Lei obediently took it, picked up the small mill on the side and began to grind. The old man Li on the side was also observing him, and he found that although Liu Lei's movements were a little rusty, he should be fine, and he nodded and had a trace of curiosity about Liu Lei in his heart.

"Humpit, yin-loving, good water, generally grows near the swamp in the jungle, the powder is adhesive, can be used as a fusion agent for medicines, and is the basic medicinal material for preparing medicines." Old man Li was busy with the work at hand, and said to himself without raising his head.

Liu Lei on the side didn't know why Old Man Li suddenly explained the medicinal properties to himself, but he still nodded and listened carefully.

"Grass yellow, sun-loving, generally grows on sunny slopes, juicy, juice animals take has the effect of accelerating blood flow, generally used to make stimulant drugs"

Old man Li kept picking up the medicinal materials on the side and gave Liu Lei a brief introduction, and at the same time instructed Liu Lei how to deal with the medicinal materials.

After being busy for most of the day, Liu Lei processed hundreds of copies of various medicinal materials, only to feel that his arm was sore and swollen, and most of the time the old man Li also instilled a lot of pharmacological knowledge into Liu Lei, and Liu Lei, who only listened, was dizzy, as if he had returned to college and taken a chemistry class.

On the side, Old Man Li was not idle, mixing all kinds of unused medicines among various containers, and the bottles containing medicines placed most of the wide tabletop.

"Huh......" Old man Li breathed a sigh of relief, he didn't give Liu Lei new medicinal materials, Liu Lei sat on the ground and wiped his sweat, just now because Old Man Li had time requirements for dispensing many medicinal materials, and the time to fill in the medicinal materials was very tight, Liu Lei didn't rest for a moment.

"The medicinal materials you brought back are all used up, these should be enough!" Although Old Man Li has been busy for most of the day, he has been at ease and said calmly.

"What the hell are you doing, old man? As a doctor and a poison maker, he is like a strange doctor," Liu Lei said with a sigh of relief.

"I don't understand what you're saying, but I'm really weird, have you rested, stand up when you're okay, and there's one last potion, you can make it!" Old man Li said softly.

Liu Lei was stunned for a moment and said, "Me? …… You can pull it down, I can't do anything, I can't fix it! ”

Old man Li smiled and said, "It's okay, I'll teach you"

"No! No way! ”

Liu Lei waved his hand again and again, he just watched the process of old man Li dispensing medicines, what to put at each time, and how much to put each medicine There are strict requirements, which makes him come, he can't do it like Old Man Li.

"I can't, I won't"

Old man Li suddenly changed his face and threatened: "Are you coming or not?" Tell you that this medicine is the most critical, if you don't come, pull it down, I won't help me prepare it, and I won't blame me if I can't take it down."

"You...... Yes! I'm coming, but I said okay, if I can't get it right, I want you to come! Liu Lei reluctantly compromised.

"Don't worry, don't worry" Old man Li shook his head proudly and said with a smile.

Liu Lei gritted his teeth and got up from the ground and came to the position where Old Man Li was standing just now.

Old man Li saw that he was ready, and ordered: "Heat the fermented grass powder first"

Hearing this, Liu Lei lit the simple small stove on the table, took a piece of putrid grass powder and heated it in a bottle.

When the powder had begun to turn black, Old Man Li said again: "Add yellow grass juice."

Liu Lei hurriedly added the yellow juice that had been prepared at the beginning and had been useless to Old Man Li, and the liquid in the bottle turned black.

Later, under the guidance of Old Man Li, Liu Lei added several medicinal materials that Old Man Li had not used, and then Liu Lei found out that Old Man Li had already planned to let him prepare potions.

"Add water!"

Just when Liu Lei was thinking about it, Old Man Li suddenly shouted, Liu Lei reacted half a beat slower, and hurriedly added water to the bottle, and the water was added, and the liquid suddenly became transparent.

"Smack"

Old man Li gave Liu Lei a heavy slap on the back of his head.

"Slow down, what are you thinking, this is scrapped, pour it out and start over"

Liu Lei grinned when he was beaten, but he didn't dare to say anything, poured out the liquid in the bottle, shook it for a while, and put it back on the fire.

……

"Scrapped, start over"

"The fire is too big, start over"

……

After failing three times in a row, Liu Lei became more and more cautious, and his attention was also highly concentrated, and he hurriedly did so after hearing Old Man Li's instructions.

"Add fire, fire," Old Man Li said loudly.

Liu Lei hurriedly opened the vent of the stove to the maximum, and the flame of the simple small furnace suddenly became bright.

When the liquid in the bottle became less and less and became viscous, Old Man Li's eyes lit up.

"Pour it into the bottle"

Liu Lei hurriedly poured the potion into the medicine bottle prepared on the side.

Old man Li reached out and picked up the still steaming medicine bottle, sent it to the bottom of his nose and sniffed it gently, nodded slowly in Liu Lei's expectant gaze and said, "It's done." ”

"Bang!" Liu Lei once again hit the ground with his butt, panting, and his full attention made his physical exertion extremely great.