I, the Lord of the Fifth Throne, am the source of all things!

The prescription that the other party had seen appeared before Duanmu Lian's eyes.

"So the ingredients of medicine are this complex. For ancient physicians, this is truly remarkable..."

Duan Mulian activated the chat group system's analysis and calculation function. With the help of the auxiliary optical brain's calculations, she gradually understood the ingredients of the prescription and all the ways the drugs worked.

He truly admired the doctor who created the life-extending drug for Muzan.

Judging from the prescription alone, one can see the pharmacist's medical expertise; it wouldn't be an exaggeration to say that he was the Li Shizhen of Japan.

"However, there is still a lot of room for improvement in this drug."

Looking at the various medicines displayed on the virtual screen, Duanmu Lian suddenly remembered some rare flowers and herbs he had collected in the past.

Examples include the Sun Staircase in Resident Evil, the Blood Orchid in Anaconda, and even the strange plants in Plants vs. Zombies.

Just thinking about these things, and looking at the prescription in front of her that still had room for improvement, made Duanmu Lian's research addiction kick in.

..........

A week later, in the dead of night, a blizzard and howling winds swept through the mountains.

Duanmu Lian walked alone on the snow-covered mountain, oblivious to the wind and snow.

Even though it wasn't nighttime, the environment on the mountain was incredibly gloomy.

Fortunately, some light sources were visible, which guided its direction.

When Duanmu Lian saw a thick rope winding through the woods blocking his path, a slight smile appeared on his calm and indifferent face.

This means he has reached his destination.

Following the direction of the firelight and lamplight, Duanmu Lian soon arrived at a position near the top of the mountain and saw a house with lights on.

As you get closer, you can clearly hear people talking inside the house.

Duanmu Lian tidied herself up, adjusted the bag on her back, and then went up to knock on the door.

The room fell silent for a moment, then a soft cough was heard.

"Ahem, Tanjiro, go open the door, we have a guest."

"Yes, Father."

Accompanied by hushed conversation, the door slowly opened, and orange flames peeked out from the crack.

By the warm firelight, Duanmu Lian looked into the house.

Behind the half-open door stood a boy with deep red hair, red eyes, and a scar on his left forehead.

Behind the boy, several children could be seen surrounding a thin man, looking curiously in their direction.

The man had the same deep red hair as the boy in front of him, but the boy looked unhealthy, pale and thin, with a faint scar on his left forehead.

"Sorry to bother you, I'm just a lost herbalist."

Duanmu Lian looked at the family in front of her with a calm but troubled expression, and said in a somewhat helpless tone.

Tanjiro Kamado took a sniff and indeed smelled the medicinal scent that could only be found in pharmacies on the blue-haired youth who was a little older than him.

He was born with a unique and keen sense of smell, which allowed him to discern human emotions through scent, and also to distinguish between humans and ghosts.

Knowing this, Duanmu Lian made all the necessary preparations before lying.

"So that's how it is... cough... the snow suddenly got so heavy today. Come in quickly, child, rest for a while and have a cup of hot tea."

When Tanjuro Kamado, the father, saw his son with a keen sense of smell turn and nod to him, he led Duanmu Lian into the house.

The firewood inside the house radiated warmth, making the room cozy—a completely different world from the icy, snowy landscape outside.

"Nezuko, go and get some rice balls."

Upon hearing her father's words, a pretty young girl nodded gently, got up, and went to the kitchen to fetch rice balls.

Meanwhile, Kamado Kui-e, as the matriarch of the family, also poured hot tea for Duanmu Lian.

"Ahem... Child, are you going up the mountain to gather herbs alone? You know there are bears on this mountain, aren't you afraid of the danger?"

Tanjuro Kamado, with a robe draped over his shoulders, sat in front of Ren Duanmu, adding more firewood to the brazier to make the flames burn brighter.

Looking at Duanmu Lian's fair skin and pretty face, Kamado Tanjuro guessed that she was not from an ordinary family.

"That medicine is very important to me, and I don't know anyone else, so I had to come in person."

Duanmu Lian took a sip of tea, then took out some candy from the backpack behind her and gave it to the children around her.

Upon tasting such sweet candy, the children's faces immediately lit up with smiles.

Seeing this, Kamado Tanjuro nodded to himself, while Kamado Aoi smiled and, upon hearing Duanmu Lian's words, immediately replied:

“Our family has lived here for a long time and we are very familiar with the flowers and plants on the mountain. Tell us what medicine you are looking for, and maybe we will know it.”

Upon hearing this, Duanmu Lian remained outwardly calm, but inwardly she was delighted.

He took out a medical book from his backpack and began to tell Kamado Aoi that he was looking for a certain kind of flower.

Moreover, it is a flower that only blooms during the day.

Upon hearing Duanmu Lian's description, Kamado Aoi's eyes lit up, and she immediately laughed:

"Oh, that's the kind of flower. I know it by heart. Nezuko used to eat it when she was little."

"Have I eaten it?"

When Nezuko Kamado heard her mother say that she had eaten it, she blinked.

I tried to think about it carefully, but I couldn't recall it.

She doesn't remember eating any flowers.

"That flower only blooms for two or three days a year, and the blooming time is very short, only a few minutes or tens of minutes before it closes. After closing, it looks like a large piece of jute, and it doesn't look like a flower at all."

Seeing that her daughter couldn't remember eating everything, Kamado Aoi smiled and explained to Nezuko and Duanmu Ren.

This reminder made Nezuko suddenly remember.

When we were kids, when food was scarce, the whole family would dig for wild vegetables on the mountain; we wouldn't let go of anything edible.

My mother once found a kind of 'wild vegetable' for the family that wasn't particularly delicious or bad-tasting. It looked like wild jute and had nothing to do with flowers.

"That's wonderful, Auntie. Do you know when those flowers will bloom?"

Upon hearing what Kamado Kui-e said, Duanmu Lian beamed with joy and inquired about the blooming time of the Blue Spider Lily.

"Hmm... You've arrived not too late, but a bit early too. Those flowers probably won't bloom for another two weeks."

Kamado Hime had seen the flowers that only bloomed during the day many times, and had even taken her son Tanjiro to see them, so she naturally knew when the Blue Spider Lily bloomed.

Upon hearing this reply, Duanmu Lian nodded.

Once the snowstorm subsides, he plans to collect some samples and then wait here for the flowers to bloom.

As for the family that had helped him, Duanmu Lian decided to give them a little something in return.

He looked at Tanjuro Kamado, who didn't have much time left to live, and then gave his payment to the family.

"W-What!? Can my father's health really be cured!?"

"Duanmu-jun, can you really do it?"

At this moment, Kamado Aoi and Kamado Tanjiro of the Kamado family became extremely excited.

Nezuko and the other children also looked at Duanmu Lian with expectant eyes.

Duanmu Lian withdrew her hand from Kamado Tanjuro's body, then looked at his expression, made him stick out his tongue to look at it, and nodded, saying:

"Mr. Kamado was born weak, and his persistent cough was due to tuberculosis. The cause was probably vigorous breathing in an environment full of germs, which infected him through his respiratory tract..."

After listening to Duanmu Lian describe Kamado Tanjuro's physical condition in detail after examining him, Kamado Aoi couldn't help but nod.

Yes, exactly as Duanmu Lian said.

My husband has always been weak and sickly, and his persistent cough, which even caused him to cough up blood, started a year ago.

When Kamado Tanjuro heard that the cause of his illness was probably a respiratory infection, his expression changed slightly.

It was obvious that he had made a connection to something.

The Kagura dance, passed down through generations of the Kamado family, is a dance performed to pray for peace from the "Fire God," and it is also a breathing style.

However, Tanjuro himself does not know swordsmanship, so he cannot unleash its full power.

But when Tanjuro dances the Kagura dance, even though he is usually weak and sickly, he doesn't feel tired even if he dances continuously for a day and a night in the heavy snow. This is the benefit of the total concentration breathing technique.

Duanmu Lian guessed that since Tan Shilang's family made a living by selling coal, the chances of them getting pneumonia and tuberculosis were not small.

If you add that breathing technique on top of that...

Tanjuro concentrated intently, using his clear vision to look at his troubled lungs, and couldn't help but smile bitterly.

"Is there really any cure for my condition?"

Although he wasn't a doctor, looking at his terrible lungs, he knew that his condition was probably beyond saving.

Shortly after the birth of his youngest son, Liu Tai, his chronic illness worsened.

His health deteriorated, and he could no longer do heavy work.

"Yes! Although you have one foot in the grave, it's not too late. As your wife said, the time I arrived wasn't late, but it was indeed early."

Duanmu Lian took out a medicine bottle from his backpack that the Kamado family had never seen before, and then took out a number of medicines from the backpack one after another. He smiled and said to Kamado Tanjuro in front of him:

"To repay your family for helping me find the medicine, consider curing you as payment."

Let alone tuberculosis, what the world considers incurable diseases are nothing to Duanmu Lian.

It's probably because I had a disease before that I couldn't get cured.

Doctors like Duanmu Lian, both now and in the past, have all studied a great deal of medical knowledge and are capable of miraculous cures.