"Okay, I'll go and see your niece!" Xu Yuntian smiled and nodded.

"Okay, I'll be waiting for you at the school gate at noon!" Principal Fang looked at Xu Yuntian and said with a smile.

As soon as he finished speaking, Director Cai hurried over and shouted while running: "Principal Fang, something happened!"

Hearing Director Cai’s shouting, Principal Fang was shocked and hurriedly said, “Director Cai, what happened?”

"There was an accident in the teacher's office. All the more than 30 teachers didn't know what was going on. They were all crawling on the ground and biting people." Director Cai gasped.

"What! Is there such a thing? They can't have rabies, are they?" Principal Fang said in surprise.

"There are no dogs in the teacher's office, and it is impossible for more than 30 people to be all rabies! Go and see what to do with it." Director Cai frowned.

Principal Fang turned his head and looked at Xu Yuntian and said, "Teacher Xu, please go with me to have a look."

Xu Yuntian nodded and said, "Okay, I'll go with you to see what's going on."

Xu Yuntian told the students of the noble class to continue running, and he followed Principal Fang and Director Cai to the teaching building.

The teacher's office was on the seventh floor of the teaching building. Xu Yuntian followed Principal Fang and Director Cai to the near the teacher's office. He saw more than 30 teachers lying on the ground, sniffing the ground like dogs.

More than a dozen security guards blocked the corridor with tables and isolated the teachers, leaving them alone in the area near the teachers' office.

"Uh! What's going on?" Principal Fang looked at the teachers crawling on the ground and said in surprise.

"I don't know what's going on? They seem to be possessed by evil spirits." Director Cai frowned.

Principal Fang turned his head and looked at Xu Yuntian and said, "Teacher Xu, do you see what's going on with these teachers?"

Xu Yuntian frowned slightly and said, "I'll find out after I go over and take a look!"

Xu Yuntian jumped up and jumped in from above the roadblock. After he landed, the teachers saw Xu Yuntian and rushed towards Xu Yuntian.

Xu Yuntian found that the teachers' eyes were red, their eyes were dull, their lips were black, and they seemed to be poisoned on the surface.

Then Xu Yuntian did not attack the teachers. He grabbed a male teacher's wrist and found that the pulse was abnormal, which was a manifestation of poisoning.

"Uh! It's really poisoned!" Xu Yuntian said in surprise.

These teachers have been infected with poison that can produce hallucinations. This poison is the component extracted from a poisonous weed, called the Phantom Heart Grass.

Xu Yuntian quickly suppressed the poisoned teachers, and after a moment, all of them were restrained.

Principal Fang asked the security guard to remove the tables and chairs blocking the corridor, walked to Xu Yuntian, and asked, "Teacher Xu, do you see what's going on with these teachers?"

"These teachers are poisoned!" Xu Yuntian looked at Principal Fang and said.

"What! Are these teachers poisoned?" Principal Fang said in surprise.

"Uh! Isn't I fainting when I was poisoned? How could this happen?" Principal Fang said in confusion.

"This poison is a poison that can produce hallucinations, called the Phantom Heart Grass. After being poisoned, they have hallucinations, and they are like this." Xu Yuntian explained.

"Oh! There is such a strange poison! Then send them to the hospital as soon as possible!" Principal Fang frowned.

"The doctors in the hospital cannot resolve the poison of the illusion heart grass." Xu Yuntian looked at Principal Fang and said.

"And the poisonous heart grass is very powerful. At first, it caused hallucinations, but later it made people crazy, and finally sneaked into complete hallucinations and died." Xu Yuntian explained.

"Uh! What should I do? No one can die!" Principal Fang looked at Xu Yuntian and said with a frown.

"I can relieve the poison of the Phantom Heart Grass, but I need your help." Xu Yuntian looked at Principal Fang and said.

"Oh! What kind of assistance do you need?" Principal Fang looked at Xu Yuntiandao.

"I need you to provide medicinal materials, an induction cooker, a pot..." Xu Yuntian said.

"Okay, no problem, I'll ask someone to prepare immediately." Principal Fang nodded.

About ten minutes later, the medicinal materials Xu Yuntian needed, an induction cooker, a pot and other things were delivered to the teacher's office.

Xu Yuntian immediately connected the power supply in two pieces, turned on the induction cooker, placed the pot on the induction cooker, poured the medicinal materials into the pot, poured water into it and started boiling the medicine.

After about ten minutes, the water in the pot boiled and the teacher's office emitted a smell of potion.

Then Xu Yuntian adjusted the fire of the induction cooker, adjusted to a low heat, and continued to boil the medicine.

About half an hour later, Xu Yuntian took the pot and put the potion out.

Then pour out the residue in the pot and continue to boil the juice. The juice was brown and everyone smelled a very strong smell.

"Uh! Has the medicine been boiled?" Principal Fang asked hurriedly, because the teachers' faces changed and their faces turned green.

"Add another medicine and it will be fine soon!" Xu Yuntian said to Principal Fang.

Xu Yuntian said as he took out a small porcelain bottle, opened the small porcelain bottle, and poured in some black powder.

After pouring the black powder into the brown potion, the potion immediately changed color and turned red.

"Oh! The potion has changed color!" Director Cai said in surprise.

Xu Yuntian looked at his watch and said, "It's going to be three minutes left!"

Three minutes later, the potion in the pot was still red, but the color was brighter.

Xu Yuntian said to Principal Fang: "Let everyone take this potion to those poisoned teachers."

Principal Fang looked at Xu Yuntian and said in confusion: "Is this potion effective?"

Xu Yuntian nodded and said, "Of course it works! After taking it for three minutes, they will be fine."

Principal Fang asked the poisoned teachers to take red potion, and Xu Yuntian walked to the northwest corner of the office, where there was a water dispenser.

There was a mineral water bucket above the water dispenser. Xu Yuntian picked up the water cup and put a little water. He first glanced at it and saw that the water was a little turbid, and then he took it to his nose and smelled it.

There is a smell of medicine in the water, which is the smell of Huanxincao. "It turns out that someone put Huanxincao powder in the mineral water bucket of the water dispenser!" Xu Yuntian said to himself.

After taking the red potion, the teachers returned to normal. Principal Fang said happily: "Oh! Everyone has returned to normal!"

"Principal Fang, someone has drugged this mineral water!" Xu Yuntian pointed to the mineral water bucket above the water dispenser.

"Uh! Who gave the medicine? Why did you harm these teachers?" Principal Fang said in surprise.

Xu Yuntian shook his head and said, "It's not clear, but it's easy to find out who was poisoning it."

"Oh! How to check?" Principal Fang looked at Xu Yuntiandao.

"It's very simple. There are only three possibilities that can poison the mineral water bucket. The first is the workers who deliver water, the second is the teachers in the office, and the third is outsiders." Xu Yuntian looked at Principal Fang and said.

Principal Fang nodded and said, "Well! Your analysis makes sense. Which kind of person did it?"

"Let's rule it out one by one!"

"Let's see if there is any problem!" Xu Yuntian said as he took out his cell phone and called the water delivery worker according to the water delivery phone on the mineral water bucket.
Chapter completed!