The moon hung like a hook in the sky. After walking a distance, Yun Zhang subtly shook off the palace maids who were following him. With a wicked charm, his figure darted into the thick night and disappeared among the continuous palace walls and corridors.

“Prince Yi.” A soft, feminine voice suddenly rang out behind Yun Zhang.

Yun Zhang turned around and saw a small eunuch emerge from the shadows. The man had slumped shoulders, looked timid and fearful, and seemed very afraid of him.

"Where is he?" Yun Zhang asked calmly.

The young eunuch took a few steps closer, pointed to the Cold Palace in front, and whispered, "The side hall in front."

Yun Zhang nodded slightly, and in a few leaps, his figure disappeared into the side hall the little eunuch had mentioned.

The side hall was dimly lit, and the scent of sandalwood filled the air, making the entire space appear even more serene and mysterious.

Yun Zhang silently passed through the screen, his sharp gaze sweeping across the surroundings. He saw a figure sitting with his back to him at a rosewood desk, playing with a jade pendant in his hand.

"Yifeng, you've finally arrived." The man slowly turned around, his voice carrying a subtle but palpable air of authority that inspired awe in everyone.

Yun Zhang quickly took two steps forward and bowed respectfully: "Uncle, His Majesty has just agreed to let his nephew enter the palace to accompany him."

His tone revealed a hint of excitement and anticipation, but even more so, a deep respect for his uncle.

Upon hearing the news, a faint smile appeared on the old man's face, but he quickly regained his composure.

He sighed softly, his voice tinged with weariness: "Have you ever regretted your decision today?"

Yun Zhang shook his head firmly, his eyes shining with determination: "I have no regrets about serving my uncle."

Without his uncle, he wouldn't have survived under Old Li's rule until now.

Seeing his reaction, the old man nodded in satisfaction, a hint of relief in his eyes: "Good, that's good."

He gently raised his hand and pushed a caramel-colored porcelain bottle forward: "This is your antidote."

Yunzhang looked at the old man gratefully, accepted the porcelain bottle with both hands, and felt a surge of joy in his heart.

The old man continued, "Find an opportunity to deal with that imperial physician who treated Shenghe. The only time you and Zhizhi will be able to completely cure your poisoning."

His words exuded an unquestionable authority, as if everything was under his control.

Yun Zhang lowered his head slightly, a resolute glint in his eyes: "Nephew obeys."

He understood the old man's intentions and was well aware of the great responsibility he bore.

He carefully opened the porcelain bottle and poured out a brown pill.

The pills emitted a faint fragrance that was refreshing and pleasant.

Yunzhang placed the pill on the tip of his tongue and slowly let it dissolve in his mouth.

The pill melts in your mouth, turning into a fragrant aroma that fills your entire oral cavity.

He felt a warm current flow down his throat, permeating every corner of his body.

As the medicine took effect, his tense nerves gradually relaxed, and he felt incredibly comfortable all over.

He took a deep breath, feeling the vibrant life force and power within his body.

The title of "a renowned physician" and "a medical sage" is indeed well-deserved.

"When are you going to make your move with Old Li?" the old man asked again.

Unable to ascertain the other party's attitude, Yun Zhang could only remain silent for the time being.

Sure enough, seeing that he didn't speak, the other party continued, "Old Li is my junior brother after all. No matter how you torture him, at least leave him alive."

He paused, then added, "His life is mine to take."

“Alright.” Yun Zhang readily agreed. “I will persuade His Majesty to go to Yunluo as soon as possible and expose Old Li’s conspiracy.”

"Remember, Zhizhi's life is your life. If anything happens to her, you should know what will happen to you."

After the old man finished speaking, he suddenly raised his hand, and the room was plunged into darkness, with only the moonlight streaming in through the window lattice, quiet and serene, as if nothing had happened.

If it weren't for the lingering scent of unburnt sandalwood incense in the room, Yun Zhang himself would have the illusion that he had never met his uncle, the medical sage.

Zhao Zhi was unaware that he too was poisoned, and that the poison he was afflicted with was mutually restraining with the poison Cui Shenghe was afflicted with.

The Hidden Poison that Cui Shenghe was poisoned with was made by Old Li, the military doctor from Yunluo. This poison is colorless and odorless, and the poisoned person will not show any abnormalities in their body, but will lose a portion of their internal strength every day until they eventually become an ordinary person who is powerless.

The poison he was afflicted with was made by his uncle. Both poisons were extremely well-hidden and difficult to detect; only his uncle could administer the antidote.

Old Li and his uncle were fellow apprentices, and they fought each other their entire lives. One used the guise of saving lives to harm others, while the other, after achieving fame and success, lived in seclusion in the mountains, no longer concerning himself with worldly affairs.

If it weren't for Yunzhang, a nephew from a collateral branch, coming to his door and agreeing to some conditions, his uncle would not have agreed to come out of the mountains to rescue people.

Yun Zhang gripped the antidote tightly, considering whether to share a portion with Cui Shenghe. Sharing a portion would mean that Cui Shenghe's poison wouldn't be completely cured.

If Cui Shenghe's poison is cured, what will he use to threaten Zhao Zhi in the future?