At the same time, an extremely unpleasant smell permeated the room, a fishy stench with a hint of nausea.

"Now help him to bed."

Gu Liangsheng and Qingdai helped Cangyuan lie down on the bed. Cangyuan was still unconscious and had not woken up. His face was pale and had no color in it.

After someone cleaned up the things in the room and opened the windows, the smell in the room dissipated a bit.

Gu Liangsheng was closest to Cangyuan, so he inhaled the most of the scents.

Quickly putting Cangyuan down, Gu Liangsheng frantically pushed open the door and dry heaved in the open space outside.

Qingdai was also overwhelmed by the unpleasant smell and could hardly breathe, but fortunately she was far away and held her breath in time, so she didn't suffer as much as Gu Liangsheng.

Gu Liangsheng retched outside for almost fifteen minutes before collapsing to the ground, looking rather weak. His face was pale, and one might have mistaken him for being poisoned by a Gu curse.

Once the smell in the room had mostly dissipated, Qu Qingxi checked Cang Yuan's pulse again to make sure he was completely alright before leaving with peace of mind.

He instructed someone to prepare hot water for Cangyuan, and then called Cangzhu in to wipe Cangyuan's body and change his clothes.

Qu Qingxi returned to her courtyard, sat in the flower hall, and let out a long sigh. Even though she was a doctor and had smelled many unpleasant smells, this smell was really too strong.

Qu Qingxi felt her eyes were stinging from the fumes.

"Your Highness, why is this the method used to treat the Gu worms?" Gu Liangsheng, having recovered his senses, slumped into a chair, his eyes vacant, looking utterly exhausted.

Seeing Gu Liangsheng's reaction, as well as her own and Qingdai's reactions, Qu Qingxi couldn't help but sigh inwardly, "Biological weapons are indeed powerful."

“This kind of Gu worm has spiritual energy, and the Gu-attracting incense has almost no effect on it. It is based on the original Dream-Eating Gu, with some added fresh blood. Therefore, it is easily attracted by the smell of hot oil. This is the only way to get it out.” Qu Qingxi picked up her hot tea, took a sip, and moistened her lips.

"What role does that ginseng and chicken soup play in it?"

"This is also to lure out the red Dream-Eating Gu, which will be attracted by this kind of beneficial substance," Qu Qingxi explained.

"I see." Gu Liangsheng nodded, but looking at Qu Qingxi's calm appearance, he couldn't help but complain, "However, this smell is too awful, it's even worse than rotten fish."

As Gu Liangsheng spoke, he unconsciously recalled the taste from earlier and almost vomited again.

"Have some tea to calm down," Qu Qingxi said, pointing to the hot tea beside Gu Liangsheng.

Upon hearing this, Gu Liangsheng picked up his teacup and took several sips before he could barely suppress the taste.

"Is he alright now?"

"Yes, you should be fine after a good rest." Qu Qingxi nodded.

"Can you tell when this Gu worm was implanted in his body?" Gu Liangsheng asked curiously. "We haven't been able to find any trace of the Gu worm breeder for a while now. Could it be that he has reappeared?"

"The Gu poison in Cangyuan's body was administered yesterday evening, between 1:15 PM and 3:45 PM." This time, Qu Qingxi gave the specific time directly.

"So accurate?" Gu Liangsheng put down his teacup and stared at Qu Qingxi with wide eyes.

"Yes, this Gu worm is different from the usual ones. When it enters the human body, it will immediately cause changes in the body, although the changes will not be very big, but they can be detected. You just touched Cangyuan's pulse and could sense some things, right?"

Gu Liangsheng nodded slightly. Indeed, he had detected something unusual when he took the pulse just now.

"As for whether it's the person next to Zhou Wenli, I'm not entirely sure, but it's highly likely." Qu Qingxi turned her gaze outside.

"What I'm most curious about is why the person who raises Gu poison around Zhou Wenli would target Cang Yuan? There are quite a few young masters in the capital with higher status than Cang Yuan. Cang Yuan is just the son of a prefect. Why would they have such a deep-seated hatred between them?"

Gu Liangsheng was very puzzled. Shouldn't Zhou Wenli's men be targeting He Liufeng's associates? Why was he relentlessly attacking the son of a governor from another region?

"I don't know either." Qu Qingxi shook her head, which was also a source of great confusion for her. "Perhaps they have some kind of grudge between them."

"It's a real shame that the Gu worm was wasted like that. If there were other solutions to get rid of the Gu worm, I might be able to figure something out." Gu Liangsheng's tone was slightly regretful.

“This won’t do. It’s different from the Gu worm from before. It might actively harm people while you’re researching it, so killing it directly is the most appropriate way to deal with it.” Qu Qingxi paused in her tea-drinking motion upon hearing Gu Liangsheng’s words.

"Among things like Gu worms, black ones are mostly less toxic than red ones. Red ones are more bizarre and harder to control." They are also more difficult to cultivate.

According to Qu Qingxi's observation yesterday, Die Feng does not yet have that ability; he cannot raise red Gu worms. However, it cannot be ruled out that he obtained these Gu worms from elsewhere.

"I thought I had mastered a way to break the curse, but it turns out it was just wishful thinking on my part." Gu Liangsheng shook his head with a hint of helplessness.

When he saw Cang Yuan's symptoms at the time, he actually hoped that the Gu worms on Cang Yuan's body were the same as last time, so that he could personally remove the Gu worms under Qu Qingxi's guidance. However, he did not expect that although the symptoms were similar, it was not that kind of Gu worm.

"Maybe there will be an opportunity in the future. By the way, I have some good news for you. We met the person who raises Gu poison next to Zhou Wenli last night."

"Last night?" Gu Liangsheng sat up straight and stared at Qu Qingxi with wide eyes.

"Yes, we captured him alive, and he's currently being held in the Prince's mansion." Qu Qingxi nodded slightly.

"Captured alive? You're all alright?" Gu Liangsheng stood up and looked Qu Qingxi up and down. He found nothing unusual and breathed a sigh of relief. Fortunately, Qu Qingxi was alright. The only one here who could cure the Gu was Qu Qingxi. What would they do if something happened to Qu Qingxi?

If He Liufeng gets into trouble, Qu Qingxi must not get into trouble either.

"It's nothing. I used some sleeping pills to knock him out and then brought him back," Qu Qingxi said casually.

"A Gu keeper? Drugging? Bringing him back?" How can these words be combined?

Gu Liangsheng had witnessed the power of Gu worms before. Those who raise Gu worms must carry many Gu worms. He just stood there, waiting to be drugged without taking any precautions.