While the player is in Battle Through the Heavens, the system is in The Great Ruler.

Chapter 65 Alchemy: A Genuine Fourth-Rank Refinement
"Hey, Brother Lu, wait a minute!"

Han Xian shouted urgently, "We can discuss the price!"

He strode forward, trying to stop Lu Yu, his tone tinged with anxiety: "Fifty percent! I'll offer fifty percent, how about it?"

Lu Yu didn't stop walking, but simply said, "Seventy percent."

"This……"

Han Xian wiped the sweat from his forehead and said, "My medicine gang will be responsible for the medicinal herbs, manpower, and sales channels. Seventy percent of the profits, is that right...?"

Lu Yu finally stopped, turned to face Han Xian, his eyes sharp as knives, and said in an unquestionable manner: "70%, that's my bottom line, no discussion. Just the Golden Essence Pill, which is comparable to a fourth-grade pill, is enough to make you rich."

"Moreover, I am only responsible for refining the Golden Essence Pill and two other types of pills, which are supplied in limited quantities each month."

Han Xian's expression shifted, and fine beads of sweat appeared on his forehead. After struggling internally for a moment, he finally sighed and said, "...Deal!"

"However, Brother Lu, you must provide at least thirty Golden Yuan Pills every month."

"Twenty pieces."

Lu Yu responded decisively, then said no more and walked straight into the courtyard, instructing as he went, "Xian'er, prepare the contract documents."

Upon hearing this, Han Xian gave a wry smile, but there was nothing he could do.

A 70% profit margin is almost his bottom line. Although the medicine gang still makes a profit, it's really not much.

However, the current situation is beyond our control. If Lu Yu's high-quality pills are allowed to circulate freely in the inner courtyard, the Medicine Clan's ordinary pills will have no competitive advantage whatsoever.

In order to preserve the reputation and status of the Medicine Clan in the inner court's elixir market, he had no choice but to accept this harsh condition.

……

Half a month later,

Inside an ancient alchemy room, a rich aroma of elixirs filled the air.

Lu Yu sat cross-legged before the medicine cauldron, with blue and red flames leaping within. Suddenly, the cauldron trembled violently, and a dazzling energy ripple spread out—a sign that a fourth-grade pill was taking shape.

"call out--"

A streak of earthy yellow light shot out from the cauldron and landed precisely in the prepared jade bottle. The pill inside was perfectly round and full, radiating surging energy fluctuations—a Grade Four Beast Power Pill, successfully refined!
"It finally happened..."

Lu Yu slowly exhaled a breath of stale air, a satisfied smile appearing on his face. Over the past half month, with the help of the abundant medicinal herbs provided by the Medicine Guild and continuous alchemy practice, he had finally successfully advanced to the fourth-grade alchemist.

In fact, with his current mid-stage mortal realm soul realm, coupled with the alchemy inheritance from the Endless Fire Domain, refining fifth-grade pills would be no problem for him.

However, their actual operational skills were somewhat lacking, which is precisely why they were able to achieve a breakthrough in such a short period of time.

"However, it will be difficult to become a fifth-grade alchemist. The quality of the medicinal herbs is not high enough, and the Medicine Guild does not have many fifth-grade medicinal herbs. Even if they did, they probably wouldn't be willing to let me use them."

"In the end, people have to rely on themselves."

Lu Yu sighed softly, then shook his head and got up to walk towards the door.

Pushing open the door to the alchemy room, one could see a disciple of the Medicine Clan already waiting respectfully outside.

He presented a Fire Crystal Card with both hands and said respectfully, "Senior Lu, this is your share of the profits during this period. The gang leader specifically instructed that it be handed to you personally."

Lu Yu took the Fire Crystal Card, and the moment his fingertips touched it, the number "1050" on the card surface glowed with a soft light. The amount of medicine he had obtained in just half a month was comparable to the accumulation of an ordinary student over several years.

"No wonder everyone says that alchemists are the richest profession in the world..."

He stroked the fire crystal card in his hand, sighing inwardly. Such profits were indeed enormous. But then he thought that if it weren't for his improved pill formula and superb alchemy skills, even an ordinary alchemist would hardly have such gains.

"Adding the 500 fire energy points I got from refining medicine, I now have a total of 1,950 fire energy points."

"That's enough for another two months of training."

"This time, I can break through to the Nine-Star Dou Ling realm during my seclusion."

"But before that, I need to give the Insect Control Manual to Qinglin." With that thought, Lu Yu turned and walked towards his courtyard. As soon as he stepped into the courtyard, he saw a beautiful white figure practicing combat techniques in the small courtyard.

The Little Fairy Doctor, dressed in a plain white gauze robe, resembled a fairy from the moon palace. With a light twirl of her slender fingers, the pale purple poisonous gas transformed into countless fluttering butterflies.

Each poisonous butterfly was solidified, its wings gleaming with a cold, eerie blue light, like countless sharp butterfly knives.

This was the low-level Earth-rank combat skill that Lu Yu had obtained for her through simulation this month—"Butterfly Falling Petal Slash." Poison-attribute combat skills are rare to begin with, and throwing knife techniques are even rarer; he had put in a lot of effort to obtain it.

Sensing Lu Yu's return, Little Fairy Doctor changed her hand seals. The countless poisonous butterflies instantly gathered, condensing into a crystal-clear purple butterfly blade in her palm. The blade was as thin as a cicada's wing, yet it exuded a chilling aura of poison.

"You're back."

She smiled, and the butterfly blade in her hand immediately turned into specks of purple light and dissipated into the air.

"Okay, let's get ready and head out to find Qinglin."

Lu Yu smiled and nodded, then suddenly slapped his forehead as if remembering something, and said with a troubled expression, "I almost forgot, I still need to get a travel permit first."

Little Fairy Doctor smiled and said, "I knew you would forget. You know the rules of the inner courtyard; you need a letter from an elder to enter and leave."

As she spoke, she took out a small package from her sleeve and said, "I just happened to have prepared some snacks, which I'll take to the elders on duty."

……

Shortly after, inside the Foreign Affairs Hall.

Elder Hao, who was on duty, was dozing off in his chair. Hearing footsteps, the old man squinted one eye and, seeing that it was Lu Yu and his companion, immediately perked up: "Oh, isn't this our newly promoted fifth on the Strong Ranking?"

Lu Yu coughed lightly and took out a bottle of Golden Essence Pills and a package from his storage ring: "Elder Hao, this is a small token of my appreciation..."

Elder Hao's eyes lit up. After feigning a few words of refusal, he accepted the pills and snacks and readily issued a pass.

Before leaving, he reminded her, "Remember to come back before sunset; the souvenir is only valid for the day of purchase."

"Thank you, elder."

Lu Yu bowed in thanks and exchanged a smile with Little Fairy Doctor.

After leaving the outer hall, the two headed towards the barrier at the entrance to the inner courtyard.

Just as the two reached the entrance to the barrier, a soft cough suddenly came from the ancient tree above them. Looking up, they saw Elder Su leaning against a branch, holding a wine gourd in his hand.

"Two little ones."

The old man stretched out his hand, squinted his eyes, and said, "You know the rules, right? Let me see the souvenir."

Lu Yu smiled knowingly and respectfully handed over the document issued by Elder Hao, saying, "Elder Su, this is a letter that Elder Hao just approved. Are you on duty today?"

"Hmph, it's all because of you troublesome little ones."

Elder Su complained, but his eyes held a kind smile. He took the letter, glanced at it, and suddenly exclaimed in surprise, "Seven-star Dou Ling? Wasn't it only four-star four months ago?"

"Thanks to Ziyan for lending me the No. 1 training room," Lu Yu explained with a smile.

Elder Su nodded thoughtfully and said, "I'm afraid it's not just that. It seems that the cultivation technique you practice is also quite simple."

After saying that, he stroked his beard and waved his hand to dispel the barrier: "Go, and remember to come back soon."

Passing through the entrance barrier, the outline of the outer courtyard gradually became clear. Lu Yu and Little Fairy Doctor walked side by side towards Qing Lin's residence.

After turning a corner, the training ground of the outer courtyard came into view in the distance.

Suddenly, a petite figure on the arena seemed to sense something and abruptly turned around. Qing Lin was startled at first, but when she saw who it was, her emerald green eyes lit up.

"Young Master! Sister Little Fairy Doctor!"

(End of this chapter)