I studied abroad in modern times

Zheng's home.

Because there was no study room, Zheng Fa simply set up a small dining table and wrote in the yard.

The younger sister Zheng Shan was wearing the new clothes made by Zheng's mother and running around in the yard.

She didn't dare to disturb her brother, so she could only run around the yard, or pull the grass in the corner, or pick up a stone and scratch it on the ground, and her little head would glance in the direction of Zheng Fa from time to time.

Until Zheng Fa raised his head.

"Brother! Have you finished writing?" Zheng Shan came running over, pulling Zheng Fa's sleeve, and curiously tiptoed to look at the table.

Inside the house, Zheng's mother, who was still busy at the loom, spoke: "Shan'er, don't disturb your brother's study."

Zheng Shan pouted, but still let go of Zheng Fa's sleeve obediently.

"Mom, it's okay, I wrote this for my younger sister." Zheng Fa pinched his little sister's face and said with a smile.

"Written for me? Can I study now?"

Zheng Shan's eyes lit up, and she lay on Zheng Fa's knees and looked at the table. There were two books with wet ink on them.

There were a few words on the cover of the top one.

"Little..."

"The first volume of elementary school mathematics." Zheng Fa taught his little sister to read.

Since moving to the Zhao family, he has been thinking about letting his little sister study, but this is not easy to do.

Now the family actually relies on Zheng Fa's monthly salary to survive. Although they don't have to worry about food and clothing, they have just arrived and have no savings.

Zheng's mother has always wanted to find some work in a ready-made clothing shop, but after several shops asked about her background, they knew that Zheng's mother was from a farmer's family and thought she had no skills.

So they can't afford the little sister's dowry for the time being.

The money problem is easy to talk about, but the most important thing is actually the safety problem: the little sister has to go outside the house to go to school, and can only be picked up by Zheng's mother, which makes Zheng Fa not very reassured.

The younger sister had no books to read these days, and Zheng's mother didn't let her run around the Zhao Mansion to avoid offending the nobles, so she could only play alone in the small courtyard.

"Why, you have nothing to do recently?" Zheng Fa saw how excited she was, and knew that it was a bit uncomfortable for the lively younger sister to be trapped in a small courtyard.

"Something happened!" Zheng Shan shook her head: "In the morning, I accompanied my mother to cook, and then waited for my brother to have lunch. Then I accompanied my mother to cook, and then waited for my brother to have dinner."

Zheng Fa touched the younger sister's head: "So you want to study?"

"Study!" The younger sister nodded: "Mother said that my brother would study and become a book boy, and he could buy me delicious food and new clothes. I also want to study!"

"What do you do when you study?" Zheng Fa asked.

"Mother doesn't have new clothes to wear yet!"

Zheng Fa smiled, held his little sister in his arms, pointed to the "First Book of Primary School Mathematics" and said, "Brother will teach you this in the evening in the future, remember to study hard."

"Okay, I will definitely learn well!"

The ignorant little sister made perhaps the heaviest vow in this short life.

Watching his little sister happily flipping through the new book that she couldn't understand, Zheng Fa picked up another book and walked to the study.

He thought about teaching his little sister mathematics for a long time. Even if it didn't involve the knowledge of the immortal gate, mathematics was very useful in the daily life of the Xuanwei world, but he was cautious by nature and didn't feel safe in Zhuangzi.

Today, after practicing "Spirit Crane Body" and thinking that he had a certain ability to protect himself, he took it out to teach his little sister.

As for the other book, it was prepared for the seventh young master - "First Book of Junior High School Mathematics".

This was what he thought of from the plan of borrowing brains and the words of the old man Bai.

After all, Old Man Bai is only one person, and his time is limited. Facing the endless talismans, he is not able to cope with it. Moreover, he is really busy and goes on strike from time to time. To be honest, Zheng Fa is not very reassured.

He must reserve new brains, and Tang Lingwu has great potential.

He does not plan to spread knowledge like "Topology" that may involve the immortal gate.

But "Junior High School Mathematics" can. For him, the biggest role of this book is to screen potential brains.

The first one is the Seventh Young Master.

…

In the study, the Seventh Young Master stood in front of Zheng Fa's desk, gently turning a stack of papers with talismans drawn on the table, with his lips tightly pursed.

"Young Master?" Gao Yuan, who felt that he had a closer relationship with the Seventh Young Master, looked at his gray face and asked in surprise: "What's wrong with you?"

"How long has Zheng Fa been here?"

The Seventh Young Master silently put down the picture in his hand and suddenly asked.

"Less than two months?"

"He started to learn "Full Solution of Talismans" in less than half a month..."

As he spoke, the bitterness on the Seventh Young Master's face became more and more intense.

"Master?"

"He has analyzed more Yuan Fu in the past half month than I have in three years..." As he said that, the Seventh Young Master turned around and took out a book "Fu Tu Quan Jie Supplement: Basic Yuan Fu Chapter" from the bookshelf, opened it and compared it with the pattern left by Zheng Fa on the paper, and then put it down dejectedly: "They are all correct."

He turned his head to look at Gao Yuan, his eyes dull: "Tell me, how can the gap between people be so big?"

Gao Yuan felt like crying: "Master, I have experienced what you said a long time ago... I have asked myself this question a hundred times."

"I feel that we are close friends now!" The Seventh Young Master put his arm around Gao Yuan's shoulders: "Among so many book boys, you are the one who suits my heart the most!"

As soon as Zheng Fa entered the door, he found that the atmosphere between the Seventh Young Master and Gao Yuan was much more harmonious than usual, which made him feel like an outsider.

"Zheng Fa, what are you holding?"

"Oh, I have a book. I thought it might be useful for Fu Dao. Isn't the eldest lady coming back?" Zheng Fa handed over the "Junior High School Mathematics Volume 1" and said, "Although this book has no effect for the time being. , but it’s better to learn early.”

The seventh young master was stunned and seemed to remember something: "Is this... given to you by the person behind you?"

"Behind the back?" Zheng Fa blinked, guessing some of the seventh young master's intentions, and could only say vaguely: "Forget it."

There is a world of people behind us, and I don’t know which one you are talking about.

"Did you learn this book to have the talent of Talisman Dao you have today?" The seventh young master said excitedly as he glanced at the Yuan Talisman Diagram on Zheng Fa's desk.

"You can say that, but this is just the basis." Zheng Fa thought for a while and felt that this was not a bad thing.

"Master, among all the book boys I have, Zheng Fa has to be the best!"

Behind him, Gao Yuan looked at his new confidant and opened his mouth, as if he wanted to say something dirty but had nothing to say.

The seventh young master took the book handed over by Zheng Fa, his hands were shaking a little. He looked at the name on the cover and read softly: ""Junior High School Mathematics Volume 1", this name is a magic trick from the immortal family at first glance!"

"...can you interpret it?"

Zheng Fa was quite curious as to how he could tell.

"In the beginning, it should refer to the beginning of the Yuan Dynasty, when heaven and earth were not born, which means that this secret method points directly to the ancient times! In the middle, it refers to the great road, indicating that this is the righteous method of the Immortal Family, and may contain the meaning of moderation." Young Master Zhu Qi frowned: "What is the meaning of this mathematics? Is it related to Yi Shu? Could it be that the great master who wrote this book is from Confucianism?"

After finishing speaking, he said a little embarrassedly: "I am not very knowledgeable and cannot fully understand it. I still need to learn more."

"You understand very well and profoundly." Zheng Fa praised: "I think it is deeper than the person who wrote this book."

Holding the book, the seventh young master was silent for a while: "Actually, my sister came back to prepare me for participating in the Fairy Fair."

"Xianpinhui?" Zheng Fa looked at the seventh young master with some confusion, why didn't he say anything before.

"..." The seventh young master avoided Zheng Fa's gaze, looking a little embarrassed.

...I understand, he is another thief who wants to work hard secretly.