After transmigrating into the book, I helped my mother reconcile with her divorced husband.

Years later, her murdered mother had long since turned to bones, and even the inheritance left to her by her maternal grandfather had been seized by her father and his female assistant. Filled with hatred, the daughter sought out Lu Zhiyuan, an assassin, asking her to help investigate the truth and eliminate her father and his female assistant.

It took Lu Zhiyuan a lot of effort to figure out the cause and effect of this, and she successfully stole the plant seeds from the biologist's laboratory and gave them to the biologist's daughter.

The daughter avenged her mother using the same method and also reclaimed the property that originally belonged to her.

The system added this plot point perhaps to help the Xie family gain favor with the emperor and the people.

The so-called antidote prescription was something she'd taken from the biologist's lab, keeping it a secret from his daughter. The biologist's prescription was a Western medicine preparation, extracted from those detoxifying plants, and had certain side effects and uncertainties.

The biologist worked for the United States, and Lu Zhiyuan worried that they might use such methods to harm the Chinese people one day. So she brought the prescription back to China and worked with traditional Chinese medicine doctors to develop a final prescription that was purely herbal and had no side effects.

The biggest drawback of this prescription is that it has not been tested on live humans, but judging from the results of those animal experiments, the prescription is perfectly fine.

After dealing with the shack matter, Lu Zhiyuan and Xie Yubai went up to the city wall.

The area below was in complete chaos.

Lu Zhiyuan squinted and surveyed the scene from the city wall. Sure enough, these innocent civilians had been incited by Southern Chu spies mixed in with the crowd. Xie Yubai tried to calm them down, but the agitated crowd completely ignored him.

"Firefly, where's that thing I asked you to bring?"

Liu Ying blushed and pulled a strange-looking thing out of her bundle: "Miss, are you really going to use this?"

“With so many people, of course we need to use a loudspeaker.” Lu Zhiyuan took out her homemade wooden loudspeaker, and as soon as she tested the sound, the bustling crowd immediately quieted down.

They seemed to hear the voice of God.

The soldiers on the city wall all looked at Lu Zhiyuan, and even Xie Yubai couldn't help but ask, "What is that thing? How can it make such a loud noise?"

"This is a loudspeaker, which can amplify the sound. As for the principle, I will explain it to you later." Lu Zhiyuan sat in the city tower with a loudspeaker, which scared Xie Yubai into a cold sweat. However, the girl was still leisurely swinging her legs.

“That one, the one in the blue shirt! Yes, I’m talking about you. A spy from Southern Chu, not only do you not hide, but you even dare to cause trouble in front of the city gate. Do you think we’re soft-hearted and won’t kill you?”

The man had barely moved when Lu Zhiyuan's small crossbow shot him in the hair.

He handed the small crossbow to Xie Yubai and continued shouting through the megaphone, "Don't move! If you move again, I'll shoot your throat through! Elderly folks over there, please take a look at his ears. He's not one of your fellow villagers; he's from Southern Chu and he's here to harm you. If you don't believe me, speak a few words of your village dialect to him."

The old man's two sons died on the battlefield of Southern Chu, and his only remaining son also contracted a strange illness. Upon hearing Lu Zhiyuan say that the person standing next to him was from Southern Chu, she then said a few words that only the villagers could understand. Seeing his bewildered expression, she pounced on him and subdued him.

Lu Zhiyuan used a megaphone to point out each spies, and in no time, she had identified seven or eight Southern Chu spies.

Liu Ying was bewildered. She leaned against the city wall and asked Lu Zhiyuan, "Miss, how did you figure out they were spies from Southern Chu?"

"Clothing!" Lu Zhiyuan gestured with her chin and continued shouting through the megaphone, "Although they are wearing similar clothes and have patches on them, those patches are all new. The clothes are also new, the colors are too bright, they don't look like they've been washed repeatedly. Patches on new clothes, and the patches are so neatly done, who would be crazy if not him?"

The Southern Chu spies looked at their clothes and realized they did indeed look out of place compared to the villagers around them.

"Hair!" Lu Zhiyuan continued, "The villagers work hard all year round, barely clothed and hungry. How could they grow such good hair, and comb it so well that it's shiny and lustrous?"

The scouts from Southern Chu looked around and saw exactly what was going on. The villagers' hair was messy and covered in dust, while theirs was neatly styled.

"Attitude!" Lu Zhiyuan turned the megaphone to one side: "The villagers are suffering terribly because of the strange disease, but these spies are full of energy and only care about causing trouble. Why? Because they are not sick and do not care whether the villagers around them will die."

Upon hearing this, the people who were still trying to break through the city gate began to turn around and scout.

Seeing that they had almost finished fighting, Lu Zhiyuan continued, "His Majesty knows that you are ill and has already sent Lord Xie and Lord Jiang to prepare medicine for you. I will only say this once."

Lu Zhiyuan stood up with a megaphone in hand: "Now, do as I say! From left to right, men in one line, women in another. The city gate will open when everyone is in line. Remember, no bumping or running. Anyone who breaks the rules will be treated as a spy from Southern Chu and executed without mercy."

As soon as he finished speaking, the crowd began to move.

Liu Ying leaned closer and said, "Miss, they don't seem to know what left or right is."

Lu Zhiyuan sighed and said in a loud voice, "The one holding chopsticks is on the right, and the one holding the bowl is on the left. If your posture for holding chopsticks and bowls is different from others, then stand with the people in the crowd. When you are in the right position, the imperial physician will come out to treat you."

Someone below shouted, "Can't we go into the city? In this weather, we'll freeze to death at night."

There's no way to let so many people into the city all at once. There are still undetected cases of the disease already in the city; letting them in would inevitably cause chaos. After thinking for a moment, he turned to Xie Yubai and asked, "Does the Ministry of War have any spare military tents? Could we lend them out so they can have temporary shelter?"

"I will go to His Majesty to mediate. With His Majesty there, I think those people in the Ministry of War will agree."

"Besides military tents, there are also quilts, food, drink, and other necessities." Lu Zhiyuan counted on her fingers: "We won't trouble the Ministry of War with these; let the Emperor ask my uncle to buy them. We can't make a profit, but we can't lose money either."

Xie Yubai laughed: "You little devil, what else do you want to say? Tell me all at once."

"Doctor!" Lu Zhiyuan looked down and said, "There are too many patients. The imperial physicians in the Imperial Hospital are too busy to handle them all."

"Don't worry, I'll have someone take care of this. It should take no more than half an hour." Xie Yubai looked at the megaphone in her hand: "Could I borrow this from you, Uncle?"

There were still three city gates to go, and he couldn't bear to send his precious niece to each gate to call out to them. To save their lives, the people quickly lined up in two rows, and when the city gates opened, they saw that it was a little girl who had just been shouting at them.

Lu Zhiyuan walked between the two teams with her hands behind her back, looking at each one in turn: "Those with skin ulcers, take them to the far left and give them painkillers later. Those with dry and itchy throats and no high fever, stand on the far right."

Before she finished speaking, the soldiers who were following Lu Zhiyuan began to move, and in no time, the two rows became four rows.

Just then, a little baby wobbled out from the crowd.