All the children gathered around Jian Zhizhen, waiting for her to announce the answer.

Kan Chi-chun smiled and asked them, "Actually, it's a question of life, have you ever eaten okra? Or toon buds?"

The children said, "I've eaten."

Jian Zhizhen asked again, "Then when your parents cooked for you, did you observe it? There are some red toon buds that turn green when blanched."

Zhen Xiaohui, as a naturalist child, instantly remembered: "I remember, my father said that some things have anthocyanins in them, and anthocyanins appear red under acidic conditions, but when exposed to heat, they will decompose, and vegetables will turn green."

The other children may not usually have a chance to go into the kitchen, they have only eaten but have not seen it.

Many children were very curious and asked, "Can you do an experiment for us?"

Kan was a little embarrassed: "There don't seem to be these vegetables in the kitchen...... But."

She pulled out her toolbox from her feet and pulled out a bottle of red powder in a clear jar: "I have one more thing here, albeit on a different principle, to achieve the same effect."

Everyone came up curiously and asked, "What is this?"

Jian Zhizhen said, "This is called Red Blood Salt."

This is what she uses to make metal corrosives.

Sometimes when inventing things, it needs to be polished slightly, and at this time, it is inconvenient to move the saw, so the red blood salt and sodium hydroxide are mixed into metal corrosives, which can pitt metal alloys such as stainless steel.

This jar of red blood salt was also the main reason why she asked Qin Yubai to bring the toolbox over.

Jian Zhizhen raised her head and asked her senior to prepare a basin of water for her.

After the water came, Jian Zhizhen poured the blood-red red blood salt into the water.

After a while, the aqueous solution did appear a fluorescent green color.

This kind of green does look like a highly toxic substance, and many TV series show that highly toxic substances will make this color, because this color really makes people feel uncomfortable.

The bamboo pole glanced at the fat man coldly, and made eye contact: Look, Jian Zhizhen is really not honest! I really got something poisonous and tried to escape!

The fat man was a little panicked in his heart, and his eyes had been staring at Jian Zhizhen since he came in.

is really beautiful, worthy of being a female star who is popular all over the Internet.

It's a pity...... If she really planned to poison her, they would definitely open Jian Zhizhen's mouth and pour it into her.

There are also children who look at this color and feel inexplicably afraid: "Sister Zhenzhen, is this poisonous?"

Jian Zhizhen smiled and shook his head: "Its [aqueous solution] is not toxic, because the iron cyanide root is very stable, and if it is poisonous, my sister will not show it to you." At most, it will become inflamed in the eyes."

When the fat man heard this, he smiled and glanced at the bamboo pole: This girl is not poisoned, and she can stay for a while.

Although the bamboo pole is dissatisfied, it is also when you think about it.

Jian Zhizhen will not risk so many children, and he will definitely not mess with any toxic substances.

After Jian Zhizhen gave the children science popularization, he picked up the basin of water: "Okay, sister, I'm going to pour out the water, and you can read all the questions you just did again to consolidate it."

Jian Zhizhen said, standing up with the basin of water.

She didn't notice that there was a child sitting next to her, and he tripped over his leg.

As a result, he didn't stand firmly, and the basin of water in his hand staggered forward, all splashed on the two men.

The bamboo pole immediately showed a fierce face and clenched his fists.

Qin Yubai also stood up immediately, and his condensed gaze fell on the bamboo pole.

The other seniors also looked towards Jian Zhizhen in unison.

Senior Gongsun has quietly let everyone spread the word: these two people have been determined to be robbers, and they may have guns.

Everyone knows that in the event of a conflict, there will definitely be casualties.

But you will never watch your classmates get hurt!

Jian Zhizhen didn't seem to realize the tension of the scene.

She hurriedly walked over to the two men, took out a handkerchief from her coat pocket, and while wiping them for the two of them, she said apologetically, "I'm sorry, I'm really sorry, but it's done in a while." And it's not poisonous, it doesn't have any effect."

The bamboo pole saw that Jian Zhizhen's hands were also stained with a lot of this liquid, but he didn't suspect that the water was poisonous.

He was just upset that he was getting wet.

He stared at Jian Zhizhen coldly for a long time before he sneered and said, "It's okay, I'll do it in a while."

The main thing is that they didn't bring any clothes with them, so they had to wait to do it.

Jian Zhizhen went to wipe the fat man's clothes again.

She noticed that the fat man had been staring at her with lustful eyes, but pretending not to understand anything.

She looked at him ignorantly and continued to apologize: "Teacher, I'm sorry...... Here, give you a handkerchief, and wipe your face yourself."

The fat man took her handkerchief and wiped his face, and the lustful desire in his eyes was even more suggestive.

Even if Jian Zhizhen didn't let him touch it at all, Qin Yubai was still very unhappy.

It took a long time for his clenched fist to loosen, and his dark eyes revealed a bright slaughter.

Violence is the second most advanced way, not to mention that there are many children here.

There is a lot of way, to send them on their way quietly.

He suddenly asked, "Zhenzhen, I've come all the way and haven't eaten yet, where is the kitchen?"

Jian Zhizhen looked back at him and replied casually, "It's right next to it, you go by yourself."

The two men met their eyes.

A thousand words don't need to be spoken.

Qin Yubai looked away, nodded, and responded lightly, "Okay."

He left the classroom and walked to the adjacent kitchen.

He looked at the kitchen for a moment, then walked through the half-open window to a visual corner.

So that no matter whether anyone outside is observing him or not, his actions cannot be seen.

On the kitchen counter, there are a lot of seasonings, oil, salt, sauce and vinegar.

He opened the cabinet above the kitchen again, and there were plenty of spare seasonings in it.

He poured all the seasonings on the table into the pool.

Then into all the empty bottles, pour vinegar.

It's summer now, and although the bamboo pole and the fat man are splashed wet, both of them feel that they will dry out after a while.

Besides, Jian Zhizhen himself was stained with this green liquid, so he wasn't too nervous, they believed that it should be non-toxic, so they didn't pay much attention to it.

While the college and elementary school students were still doing their homework and giving lectures, the two of them quietly slipped into the utility room to report the situation to their boss.

After entering the utility room, the bamboo pole closed the door with his backhand and said to Liao Leiliang, "Boss, the two of us have been observing for a long time, and I feel that Jian Zhizhen and those people really didn't find that there was a problem with us."

The fat man put his hand in his pocket, touched the handkerchief that Jian Zhizhen gave him, and nodded with a smile: "They are not as godly as we think, just a group of students."

Liao Leiliang also observed the students through the cracks in the window.

They are really taking the little ones to do the questions.

Especially Jian Zhizhen, there are several children around him, and he can't think of any tricks at all.

But he still felt uneasy in his heart: "These students are all from the highest universities in the world, with such a high IQ, you two teachers don't pretend to be like each other at all, and no one suspects them? I guess we have already done something to you while we weren't paying attention, or else we would have secretly called the police."

Although he didn't understand how to move his hands.

When he noticed the danger and when he called the police, he was completely unaware.

But his instincts were dangerous.

So Liao Leiliang gave an order: "Silence them."