Lanqin didn't know how much time had passed, but she felt that this was the most difficult time of her life. Hongli was still racing against death, and she, as his mother, couldn't help him at all. Now all her hope was here, so when Su Peisheng returned to report, Lanqin held her breath, not wanting to miss a single word.

"Your Majesty, this servant has searched every corner of Yikun Palace... but found no source of poison..." Lanqin's mind swayed, and she lost her balance, but fortunately Yuxiao supported her and prevented her from falling.

Consort Nian smiled slyly and said sweetly to the expressionless Fourth Prince, "Your Majesty, I have already said that I have nothing to do with Hongli's poisoning. Now Your Majesty has investigated and searched as needed... Can't you give me justice now?"

The Fourth Prince remained silent for a long time, his expression tense. After catching his breath, he slowly said, "I... I wronged the Imperial Concubine... Since the Imperial Concubine has nothing to do with this matter, I will definitely make it up to you..."

Consort Nian glanced at Lanqin, stepped forward, and said, “Your Majesty, I am, after all, a Consort of the harem. Although I am magnanimous and can overlook Consort Xi's actions, if word gets out of today's events, people will likely say that I am incapable of managing the harem and cannot command respect. I did not mean to blame Consort Xi. Even if I don't care about these things, what about Your Majesty? Will Your Majesty be branded with the stigma of favoring Consort Xi and causing chaos in the harem? I deserve to die a thousand deaths…”

Fourth Master frowned but did not speak. Lanqin had expected this to happen. Even if she was punished, she would not care. However, the clues to Hongli's poison had been lost again.

Bai Zhi's subtle movement caught Lan Qin's attention. Bai Zhi nervously fidgeted with her fingers, a psychological instinct Lan Qin knew. This indicated that Yikun Palace wasn't as innocent as Consort Nian claimed; otherwise, Bai Zhi wouldn't be so afraid.

Lanqin gathered her thoughts, and suddenly a thought struck her. Excitedly, she stepped forward and said to the Fourth Prince, "Your Majesty, I have one last request: please have Xiao Guizi come to Yikun Palace..."

Fourth Master looked at Lanqin with a puzzled expression: "Little Guizi?"

Lanqin said, "Yes, although Xiao Guizi didn't find the messenger in the Imperial Household Department, maybe that person wasn't a eunuch at all! If he wasn't a eunuch, of course he wouldn't be on the Imperial Household Department's list, so Xiao Guizi would have even less chance of finding him."

The Fourth Prince pondered, and Consort Nian was caught off guard by Lanqin's unexpected arrival. She was momentarily flustered, her face turned pale, and her hands, hidden in her sleeves, trembled uncontrollably.

She took a deep breath and forced a calm smile at the Fourth Prince, saying, "Your Majesty, you have already investigated Yikun Palace and found no source of poison as Consort Xi mentioned. Don't you trust me? Just because of Consort Xi's words, Your Majesty is disregarding the years of friendship and trust we have built together?"

"Imperial Consort, I have no intention of harming you. It is only concerning the safety of Hongli. If you are innocent, why bother with the investigation?" the Fourth Prince said.

Consort Nian was stunned for a moment, then knelt at the Fourth Prince's feet and wept: "Your Majesty, you can't keep investigating Yikun Palace like this. I swear I did nothing wrong. Why does Your Majesty believe Consort Xi but not me?"

"Your Majesty, I beg you one last time. If you let Xiao Guizi come to Yikun Palace to identify the person, there will definitely be clues. The person who poisoned him must be either a eunuch or someone who came in from outside. Just check the recent records of people leaving the palace and it will be clear. Your Majesty... I have no other choice... Your Majesty, please save Hongli..." Lanqin was afraid that the Fourth Prince would listen to Consort Nian and lose confidence in her.

Consort Nian, breathing rapidly, clung to the Fourth Prince's robes, sobbing uncontrollably, "Your Majesty, I am innocent... You must believe me..."