The two of them returned home on the way. Lu Yanluo was thinking about the note Qin Xuelin had given her the day before. She got off the carriage and went straight to Yun Yayuan.

The note was placed in a small box. After Lu Yanluo opened it carefully, she found that there was a small strip of cloth wrapped inside the note, as if it was torn off from something temporarily.

Lu Yanluo looked at Chu Xuan beside her suspiciously, and slowly lifted the cloth strip.

"This is……"

There was something black wrapped in the cloth.

Lu Yanluo looked at it and frowned unconsciously: "Why does this look like the residue of something?" She brought it to her nose and sniffed it carefully, and then her face changed drastically.

"This stuff smells like poison to me, but there are too few residues. I can't tell what kind of poison it is yet, but it is definitely poison! Why would Qin Xuelin secretly bring a bag of poison to me? Could it be that someone poisoned her?"

Chu Xuan immediately embraced her and tried to comfort her, "No, Qin Xuelin's intelligence is not inferior to yours or mine, and she is accompanied by the palace's secret guards. If she had any problems, the secret guards would have come back to report."

Lu Yanluo felt that what Chu Xuan said made sense, and she breathed a sigh of relief.

Qin Xuelin entered the palace and became the emperor. This has always been a concern for Lu Yanluo, so she is particularly concerned about Qin Xuelin's safety.

Chu Xuan took the poison from Lu Yanluo's hand and smelled it. His expression suddenly became a little strange, as if to confirm something, he took it to his nose and sniffed it again.

Lu Yanluo noticed that his expression was a little strange, and asked quickly: "What's wrong? Do you know what this is?"

Chu Xuan turned his head to look at Lu Yanluo and whispered, "I smelled this smell in His Majesty's bedroom! I went to the palace to pay my respects a few days ago, and it happened that my father was taking medicine. This is the smell of the medicine."

As Chu Xuan finished speaking, the room fell silent. Lu Yanluo's eyes were full of shock. She looked at Chu Xuan, and the two of them stared at each other in bewilderment.

If what Chu Xuan said was true, and the medicine the emperor took tasted the same as this poison, then the emperor's illness must be...

After a long while, Lu Yanluo looked at the medicine residue in Chu Xuan's hand and slowly said, "Your Majesty is not suffering from a fever, but someone secretly poisoned Your Majesty."

Chu Xuan nodded, his face solemn: "Qin Xuelin has been serving father all the time, and is most likely to have come into contact with the medicine father took. I guess she discovered something, so she secretly found the dregs of the medicine. In order to avoid alerting the enemy, she only took out a little and took the risk to give it to you."

If this is the case, then it is a foregone conclusion that someone poisoned the emperor. But who would be so bold as to poison the emperor?

"Could the person who poisoned the medicine be Concubine Xian?" Lu Yanluo guessed, "She has lived in the harem for a long time and has not been favored by the emperor. Maybe she has long been resentful of Your Majesty. In order to avenge Your Majesty and to allow Prince Liang to ascend the throne as soon as possible, she secretly poisoned Your Majesty's medicine?"

"No." Chu Xuan denied it without thinking: "The person who poisoned me may not have this intention. Your Majesty has not yet appointed a crown prince. If he dies now, King Liang and I will definitely fight. It is not certain who will win. Concubine Xian is such a cautious person, she will definitely not do such an unsure thing, so this poison must not be intended to kill the emperor."

"If the poison is not for the purpose of killing the emperor, then what is the purpose?"

Chu Xuan stared at the medicine residue in his hand and smiled with an ambiguous smile: "It's hard to say. Why don't we imagine it together, A'Luo? If the emperor died at this moment, who would you suspect first?"

Lu Yanluo followed Chu Xuan's thoughts and thought that if the emperor died, the first person to suspect would definitely be...

Chu Xuan looked at the look Lu Yanluo was giving him and replied self-deprecatingly, "I, now everyone in the world knows that the son that father favors the most is the Sixth Prince Chu Han, who was just named the Prince of Liang. And I am just a prince who holds great power but is not favored. If father were poisoned to death by someone else, I am afraid that everyone in the world would think that I was the murderer."

Lu Yanluo was dumbfounded: "So...so all of this was set up by someone, deliberately trying to frame you. How did they frame you? Poison, drug dregs! It was drug dregs!"

The emperor is dead, and the imperial physician will surely find out that he died of poisoning. If the residue of the medicine the emperor took is found in Prince Ye's mansion at that time, the emperor will be caught red-handed. In this way, the emperor is dead, and Chu Xuan, who plotted to murder the emperor, will also be beheaded. In the end, only Prince Liang will reap the benefits.

Lu Yanluo sneered. What a good plan! She even wanted to applaud Concubine Xian and her son.

"Shen He." Chu Xuan called Shen He and ordered, "Secretly seal off the palace immediately. No outsiders are allowed to enter or leave at will. Bring people to search the palace immediately. Don't miss any corner. If you find anything that looks like drug residue, report it to me immediately."

Shen He took the order and left. The gate of Prince Ye's Mansion was closed tightly. Other people in the mansion did not understand what it meant, but they did not dare to say anything.

A whole hour passed, and Shen He and his men searched the palace thoroughly, but did not find the medicinal residue that Chu Xuan mentioned.

After hearing this, Chu Xuan did not say much, but only ordered that the security in the palace be strengthened in the next few days, loose on the outside but tight on the inside, and no outsiders were allowed to enter the palace without permission.

We must not give those with ulterior motives a chance to take advantage of us.

In the evening, just after dinner, Chu Xuan entered the study. The emperor gave the imperial guards to Chu Han. After all, it had a significant impact on him. Many things needed to be planned early.

At the same time, Yun Yayuan was like a small world at this moment. Chu Yuan and Chu Yao, brother and sister, came to the yard after dinner. Chu Yuan played alone, while Chu Yao read a book.

Lu Yanluo sat quietly in a chair beside her in a daze. She felt so relaxed at this rare moment.

Chu Yuan was a restless little troublemaker. He was running around the yard in circles with a red rope he got from somewhere. As he was running, he tripped over something and fell forward.

Seeing this, Lu Yanluo hurried over and helped Chu Yuan up: "How is it? Are you hurt? Why didn't you be more careful!"

Chu Yuan was knocked unconscious, and after a long while he shook his head: "Mother, Yuan Yuan doesn't feel any pain."

Lu Yanluo felt a little helpless and brushed off the dirt on Chu Yuan's body. Her eyes swept to the place where Chu Yuan had just fallen, and Lu Yanluo was stunned.

There was a stone brick on the ground there, with one corner inexplicably raised. Lu Yanluo found it very strange because Chu Yuan always loved to run in the yard, so the stone bricks in the yard had to be inspected every few days.

Lu Yanluo reached out and lifted up all the raised bricks...

Below was a yellow oil paper bag with some scattered black residues around it.

It turned out to be the medicinal residue that everyone had been searching for for half a day! Lu Yanluo looked fierce, with a dark storm in her eyes.

"Someone come here." Lu Yanluo said coldly, "Take the young lady and the prince back to the house."

Lu Yanluo felt a chill in her heart. She never thought that those people would actually put the things in Yun Yayuan.