This underground river channel is like a huge tunnel, empty, and there is almost a resounding sound when speaking.

Chang Kang, who had heard the fool several times before, was immediately dissatisfied, "Your Highness, if you take the Ninth Master as the standard, in comparison, everyone in the world is all fools! You used to praise me for being smart!"

"When did I praise you?" Zhou Xian said angrily.

"Your Highness, you don't remember it. That time, let's go to the farm to pick fruits and eat it. Good guy, I didn't know why, I poked the hornet's nest! I looked at a river and pulled you directly into the river, diving into the water, and I got up after the hornet left!"

"At that time, everyone from all over the country came to see me! I thought some mandarin ducks came from and died, so I almost didn't catch them. Later, I knew what was going on, so who didn't praise me for being smart!"

Chi Shi couldn't help it anymore, "You two have light skills."

Chang Kang was stunned, and the river channel became silent for a moment, followed by Zhao Lanting's hilarious thunder.

Zhou Xian smiled and lowered his voice, "Are you better after you come back?"

"What?" Chi Shi frowned.

"I saw it before. Your mouth was redder than usual. It was because you had internal injuries. You just raised your breath to save someone, so you vomited blood? Is it in Pingyang that you are trying to save me..."

Zhou Xian said, stoking Chi Shi up, "Why don't you tell me?"

"I was not injured. I just ate Hu La Tang in Shengjinglou. Besides, even if I was injured, what's the use of telling you? Are you Hua Tuo or Bian Que?" Chi Shi said goodbye.

"Well, you were drinking Hula Soup while watching your brother parading on the streets. You were so happy that you poured a bowl on Cui Jiangyan's forehead."

Chi Shi said, "Is Hu La Tang worth it? Why did you invite Cui Jiangyan to drink it for no reason?"

Zhou Xian was still trying to speak, but he heard Chang Kang shouting in front of him, "Master Jiu, our highness has ever carried someone, have you ever carried someone?"

Chi Shi breathed a sigh of relief and said loudly, "If the dead are counted, then I will recite it."

There was another silence in the tunnel...

After walking for a while, a stone staircase appeared. Chang Kang put Zhao Lanting on the ground, held it up, lifted it up, and the four of them walked out one after another.

After staying there for a long time, the whole air felt fresh as soon as it came out of the ground.

When I looked around, I saw that this was a house.

Like the house near the Jingzhao Prefecture Office that Zhou Xian led her to last time, it was quite similar.

Hearing the noise, an old lady immediately came out from inside. She saluted Zhou Xian and brought clean shoes and socks over.

After a few people sorted it out, Zhou Xian led Chi Shi out of the yard door, and his carriage asked Chang Kang to drive to see Zhao Lanting off.

"What do you think of today's case?"

"You should recognize that word, it's obvious. When I went to Pingyang, Chang Kang took the prescription you had taken before. Although my senior brother didn't use it, I took a look." Chi Shi said, touching the prescription she tore off.

"It's Shen Guanlan's word," Zhou Xian said, feeling a little heavy.

"Although Guanlan is obsessed with drugs on weekdays, he is even a little crazy. You said he used rats to test the drugs, which is possible, but he directly tried the drugs with someone. I don't think he would do this."

Chi Shi neither nodded nor shook his head, "At present, it seems to be extremely unfavorable to Shen Guanlan. There are four victims in total, and Zhao Lanting is not dead, but he is also considered one of the victims. From your description, these four people have almost nothing in common except that they are all humans."

"But if it is a test of the medicine, it makes sense. The old man, the child, the middle-aged man, the young woman... the murderer took advantage of the situation and fainted with the medicine and kidnapped the person with the medicine, and then took him to the underground river to test the medicine for them. After death, he threw the body directly on the spot."

"Chen Guanlan is the most famous pharmacist in the capital. He can smell the smell of the medicine in the Chu Palace on weekdays. Anyone who knows him knows how crazy he is to poisons."

"None of these are the most deadly. The most deadly ones are the prescriptions posted on the wall, which are Chen Guanlan's handwriting. Others don't know it, but you definitely know it."

Zhou Xian was silent for a moment, "I believe Guanlan is not the murderer, someone is going to frame him. Isn't it?"

Chi Shi raised his eyebrows, "However, there are a few suspicious things in this case that I have not figured out."

Zhou Xian's eyes lit up when he heard this, "What is it?"

"On the surface, Chen Guanlan has the greatest suspicion. However, the first and most obvious point is that you said that a few days ago, Cao Tui of Jingzhao Prefecture and Su Guozhu also went to patrol the underground river. As soon as you went there, you found stalagmites, but they did not."

"Will the whole world be blind? Is it good if you only have your eyes? Moreover, this mechanism is very strange. Generally, people with many secrets have dark rooms at home."

"Maybe in the study, if one of the books on the bookshelf is pressed down, the vase on the Bogu shelf is twisted, or a bulge on the wall is slapped, and the door will open."

Zhou Xian suddenly realized, "Chang Kang broke the bamboo shoots, but the door was still open. Usually, in this case, either the door would not open, or even if it opened, the death defense would be opened... Chang Kang was also muttering at that time, worried that poison gas would emerge or arrows would be hidden..."

Although Chang Kang was a little silly, he was quite knowledgeable. He subconsciously told his own experience.

Chi Shi nodded, "Second, Chen Guanlan has a small building in the Chu Palace for him to test the poison. He has done the things in the secret room in the small building, and no one will doubt it at all."

"Why did he run into the dark river? He was simply taking off his pants and farting, and he did this indifference. The body had been found in Jingzhao Mansion, but he was still indifferent and even put his words on the wall... leaving fatal evidence."

"So, do you have any special hobbies for fools? If you are not fools, you cannot enter the Chu Prince's Mansion?"

Zhou Xian breathed a sigh of relief, "So my guess is correct. Some people deliberately framed Chen Guanlan. Some people deliberately used stalagmites to expose the mechanism just to let me go in and see the prescription on the wall."

"Even if Officer Cao and Su Jie saw the prescription, they were not sure who wrote it. But I am different... I met Chen Guanlan when I was young and studied with the same master together. I cannot recognize him."

"If I say it, then Chen Guanlan will become the biggest suspect and will be difficult to escape from the crime; if I hide it, I will immediately attack and say that I will cover him up, and then the innocence seal I hold in my hand will become a joke."

Chi Shi shook his head and looked at him with contempt, "You are not speculating, you are blind confidence in your relatives and friends, and you have preconceived ideas."

"Third, Zhao Lanting lied to us."
Chapter completed!