Zhang Yun'an looked up again as two figures emerged from the building. Zhang Keqin was still wearing his apron; his greatest hobby now, outside of work, was cooking.

No one used to eat what he made, so he’d lost interest, but now that both Zhang Yang and Mi Xue often came over, he had rediscovered his passion. “Yun’an, why aren't you getting out of the car?” Zhang Keqin called out loudly by the car door.

Zhang Yun'an and Zhang Yang quickly stepped out. Zhang Yun’an walked toward Zhang Keqin, smiling as he spoke, “Just finishing up a talk with Yangyang.

Keqin, how is your body feeling?” All along, Zhang Daofeng had held a strong opinion against Zhang Keqin; he had long realized that Zhang Keqin was too career-driven and wouldn't prioritize family. Coupled with Zhang Keqin’s ambition and promising future, he had been unwilling to let his daughter marry him.

In Zhang Daofeng’s view, his daughter just needed to live a safe and peaceful life, but unfortunately, things had still taken an unexpected turn. However, that was just Zhang Daofeng’s perspective.

Zhang Yun’an’s relationship with Zhang Keqin wasn't that strained, and things had eased considerably after Zhang Yang’s engagement last time. Zhang Keqin smiled faintly.

“I’m fine; I can manage!” “Latent Toxin is troublesome. It wouldn't form unless the toxin was potent.

I’ll take a look for you in a moment!” As Zhang Yun’an spoke, he followed Zhang Keqin into the room. Several dishes were already set on the dining table, all personally cooked by Zhang Keqin.

Since Zhang Yun’an had arrived, Zhang Yang didn't rush him to identify the specific toxin; they all sat down to have dinner together. Zhang Keqin even had some Monkey Wine.

Zhang Yang had brought it over later, and he specifically brought out two bottles to treat Zhang Yun’an. Zhang Yun’an was no stranger to the Monkey Wine; it was a treasure of the Li family of Shushan.

After the Li family sent all the wine to Zhang Yang, he had also arranged for some to be sent to Zhang Yun’an. Zhang Yun’an was not surprised by this Monkey Wine.

They only drank two bottles; this Monkey Wine was quite potent. Even those who practiced Neijin might not be able to handle it, and since he needed to consult on Zhang Keqin’s condition later, it was better to drink less.

Dinner didn't last long, but the atmosphere was excellent. After the meal, Mi Xue voluntarily started clearing the dishes.

Zhang Yun’an and Zhang Yang were both invited into the study by Zhang Keqin. Entering the study, Zhang Yun’an was direct and immediately extended his hand to take Zhang Keqin’s pulse.

This wasn't because he doubted Zhang Yang’s words; doctors naturally trust their own diagnoses the most—it was just a habit. “It is indeed a Latent Toxin, at least ten years old!” After a moment, Zhang Yun’an spoke with a solemn expression.

Feeling the pulse of a Latent Toxin wasn't difficult; Zhang Yang could detect it, and so could he. Pulling his arm back, Zhang Yun’an then asked, “Yangyang, have you been conditioning Keqin’s body?” Zhang Yang nodded.

He had started doing so as soon as relations were restored. Having lived two lifetimes, he had few relatives in either, so he naturally took extra care of his own kin.

“No wonder. It’s a good thing you did this beforehand, otherwise Keqin would be in much deeper trouble this time!” Seeing Zhang Yang confirm it, Zhang Yun’an nodded again.

From the pulse, he observed that although Zhang Keqin’s Latent Toxin had erupted, its virulence was not as severe as other cases, and Zhang Keqin’s natural resistance was significant, far surpassing that of peers his age. This could only mean that someone had already fortified his body previously.

It was precisely because of this reinforcement that he could appear like a normal person now after the toxin erupted, without any sudden incidents. “Uncle, please take a look and determine what exactly this poison is!” Zhang Yang said softly.

The existence of the Latent Toxin was confirmed; the most crucial part was identifying the poison to apply the correct treatment. Zhang Yun’an remained silent, then took out a small knife from his person.

He gently gripped Zhang Keqin’s arm and made a small incision on it. As he cut, he tightened and then loosened his grip on Zhang Keqin’s hand, causing a line of bright red blood beads to shoot out directly from Zhang Keqin’s arm.

Zhang Yun’an reached out and caught the blood beads, holding them in his palm. Zhang Keqin watched all this with astonishment.

After his hand was grasped, his entire arm became numb; he felt no pain at all when Zhang Yun’an cut his skin and squeezed out the blood. When Zhang Yun’an released him, he still felt no pain.

Looking at his hand, aside from a faint red mark, there was no sign that it had ever been cut. This miraculous sight was something he had never witnessed before.

Zhang Yang nodded silently. As expected of his Uncle; this method of drawing blood was incredibly adept.

The lineage of the Medical Sage had many techniques for blood extraction, and this was one that drew a small sample without causing the patient any pain. Holding the blood, Zhang Yun’an slowly channeled his Neijin towards his hand.

His hand gradually turned somewhat reddish, but unlike the deep red produced by Chu Yuntian’s Blood Dissolution technique, this was the gentle flush of a face red from winter cold. The cluster of blood held in Zhang Yun’an’s palm slowly began to boil, emitting faint white steam and a pungent, foul odor.

Soon, the blood disappeared entirely, leaving behind a faint, unknown black residue on Zhang Yun’an’s palm. “Uncle, what exactly is the poison?” As soon as he finished, Zhang Yang anxiously asked.

His own Neijin cultivation wasn't sufficient for toxin analysis, which was why he had specifically invited Zhang Yun’an. Knowing the poison meant they could treat it, hence his urgency.

Zhang Yun’an’s expression grew serious. Zhang Keqin watched him nervously.

The preceding display had seemed incredibly magical to Zhang Keqin, though he wasn't overly surprised, having long known that both Zhang Yun’an and Zhang Yang were extraordinary. What concerned him most now was his own health.

He appeared composed, but in reality, he was anxious. He simply possessed a far greater capacity for mental endurance than the average person.

No one could remain completely calm upon learning they were poisoned, unless they were someone who wished for death long ago. Glancing at Zhang Yang, Zhang Yun’an slowly spoke, “Keqin’s Latent Toxin this time is the poison of the Purple-Eyed Golden Toad!” “Purple-Eyed Golden Toad?” Both Zhang Yang and Zhang Keqin froze, their eyes wide with shock.

They were familiar with the name; ten years ago, the dispersal of their family and the death of Zhang Yang’s mother were due to it. Ten years ago, Zhang Yang himself had been poisoned by the Purple-Eyed Golden Toad.

His mother had traded her life for his, using the Zi Wu Zhuan Huan Shu (Meridian Switching Technique) to save him, resulting in tragedy. It was also because of that incident that Zhang Yang and Zhang Keqin endured a decade of misunderstanding.

“Uncle, is it truly the Purple-Eyed Golden Toad poison?” Zhang Yang asked again. The poison of the Purple-Eyed Golden Toad was no minor affliction; it was the toxin of one of the Ten Great Venomous Beasts.

Without a specific antidote, Zhang Yang couldn't completely detoxify it. “Correct.

I can assert it is the Purple-Eyed Golden Toad poison; don’t forget, I’ve seen this toxin before!” Zhang Yun’an nodded heavily. He was the one who ultimately purged Zhang Yang’s poison back then, so he was intimately familiar with this toxin.

However, neither of them had expected that Zhang Yun’an himself had been poisoned then, leaving a Latent Toxin inside his body. “Keqin, before I arrived back then, did you have any specific contact with Shihua or Yangyang?” Zhang Yun’an grew very serious.

The toxin of one of the Ten Great Venomous Beasts wasn't easily contained, and his own sister had died from this very toxin. He hadn't expected Zhang Keqin to suffer a similar fate today.

Zhang Keqin was also reeling from the shock. Hearing Zhang Yun’an’s question, he let out a wry smile.

“Specific contact? What do you define as specific contact?” “For example, injecting their blood into your system?

But that doesn't make sense; you were healthy, why would you accept their blood?” Zhang Yun’an spoke slowly, a hint of confusion coloring his words. This was poison, not a contagious disease.

Only through the toxins in the blood could someone else be infected. Zhang Keqin was healthy at the time; how could he have undergone a blood transfusion or accepted tainted blood?

Aside from blood transfer, mere skin contact or other forms of intimacy wouldn't cause any issue, let alone illness. “I remember once, Shihua accidentally cut her hand, and I sucked the wound for her.

Does that count as special contact?” Zhang Keqin suddenly said. The moment he finished speaking, Zhang Yang and Zhang Yun’an stiffened, exchanging a sharp look.

After Zhang Shihua performed the Zi Wu Zhuan Huan Shu, her body carried a massive amount of the Purple-Eyed Golden Toad toxin; her blood was essentially saturated with it. Zhang Keqin hadn't received a transfusion, but sucking the wound was equivalent.

At that moment, the two finally understood the origin of Zhang Keqin’s Latent Toxin. That wretched Purple-Eyed Golden Toad not only harmed Zhang Shihua ten years ago and nearly killed Zhang Yang, but it also left such a severe hidden danger for Zhang Keqin.

The entire Zhang Yang family had been tragically afflicted by this venomous creature. “I understand.

We can confirm now that your Latent Toxin was left from that time!” Zhang Yun’an nodded slowly. Zhang Shihua’s blood was tainted, but through the transformation technique, the toxicity was weakened.

Moreover, Zhang Yang had only been poisoned by accidentally ingesting residual toxins. This meant that by the time it reached Zhang Keqin, the toxin had become much milder.

But the poison of the Purple-Eyed Golden Toad was incredibly potent; it hid dormant until it erupted now, nearly killing Zhang Keqin outright. The cause was found: the ultimate culprit remained that Purple-Eyed Golden Toad from years past.

“Uncle, I recall when you detoxified me back then, you killed that Purple-Eyed Golden Toad. Did you keep any of its skin?” Zhang Yang turned back and asked softly.

The Ten Great Venomous Beasts possessed inherent detoxification properties. The Fox-Tailed Mink's was its saliva, while the Purple-Eyed Golden Toad's was its disgusting skin.

Back then, in order to save Zhang Yang, Zhang Yun’an chased the comatose creature for a long time and finally found and killed the Purple-Eyed Golden Toad, obtaining the antidote. Zhang Yang asked this with great hope.

After all, the Purple-Eyed Golden Toad was a Spirit Beast, and useful raw materials were typically preserved after its demise. If the antidote still existed, Zhang Keqin’s Latent Toxin could be completely purged without any danger.

A few seconds later, disappointment flickered across Zhang Yang’s eyes. “No, I kept the Toad’s carcass for further research back then, not expecting it would be needed later, and I used it all up a few years ago.” As he spoke, Zhang Yun’an looked slightly embarrassed.

He had tried to use some materials from the Purple-Eyed Golden Toad to concoct a powerful poison along with its antidote, but the attempt failed, and all the raw materials were wasted. Second update yesterday.

Little Yu has a bit of a cough and feels very tired. This chapter was updated quite late, so I ask for my friends’ understanding!

RQ