This person has no solution to face.

The several questions Zhang Shangshu took out were all very classic math questions, which were the questions that Song Beiyun wrote to motivate Zhang Qing to use after the introduction to mathematics.

This requires the use of algebraic equations to solve, which is probably equivalent to the difficulty of the third year of high school. Of course, it is not understandable for entry-level people. Algebra is obviously not something that Lord Zhang has learned, so I think it was a night of hard thinking but I couldn't solve it.

But come and ask directly, how can you keep your face? No matter how you are, you suppress Song Beiyun regardless of age, qualifications or official positions, and let him be a minister of the court and ask without shame. Sorry... he can't do it.

But, seeing these questions is like a thorn in his throat, he is very convinced that if he cannot get the solution to these questions today, he will definitely be sleepless, so he simply changed his approach and found Song Beiyun by setting the questions himself.

"So, sir, I'll let you see it for you. Lord Zhang checked it for me and examined it for the authenticity."

"Can."

Song Beiyun took out his pencil and started writing it on the paper. Zhang Shangshu watched his writing process, but the more he looked, the more he became confused, and there were more and more things on the ghost-drawing talisman on it...

"We bring in here..." Song Beiyun explained to him while writing: "We have to consider this factor, so here is not 2 but root number 2."

Although Song Beiyun tried to write as much as possible after a few questions, Zhang Shangshu was still unable to solve it. Finally, the Qing girl jumped out and shouted: "Master, my father can't understand what you wrote like this."

This childish remark made Zhang Shangshu blush with shame, but he calmly picked up the cup and drank a sip of tea: "It's nonsense, how can I not understand the minister of the Ministry of Works?"

"Then tell me what x represents, what y represents, and what y square represents." Zhang Qing refused to give in: "Say it!"

Shangshu Zhang snorted coldly: "If you say that, what else is it?"

"It's better if you don't understand, it's not embarrassing. Why don't you pretend to understand?" Zhang Qing looked at Zhang Shangshu with a confused look on his face: "Master said, "You know what you know but don't know what you don't know."

Song Beiyun turned around and said, "Zi said!"

Shangshu Zhang suddenly lost his words, felt ashamed, and looked at Zhang Qing angrily for a few times, feeling a little restless.

"Mr. Zhang must understand, otherwise he would not have come to investigate me." Song Beiyun stood up and said, "It's just that my solution to the problem is arbitrary and unreasonable. If he doesn't play according to common sense, Lord Shangshu naturally feels angry."

"Master, you..."

Miss Qing was about to continue talking, but Song Beiyun pinched the back of her neck and threw it outside the door and closed the door...

"Sir Shangshu, she is gone."

Shangshu Zhang let out a long sigh, then pointed to the numbers on the paper and said, "What is this substitution?"

Song Beiyun likes to show off, but he never shows off in terms of knowledge. He is humble in his own shortcomings, and he is also patient in what others don’t understand, so he sits there and explains to Shangshu bit by bit what algebra is.

I have to say that a big man who can become a high-ranking official position like Shangshu is definitely the best in terms of IQ. When Song Beiyun explained, he discovered that he had almost eaten the entire reference book in one night.

Not to mention anything else, Song Beiyun alone cannot compare to his hard work. If Zhang Shangshu was a modern person, he would probably be the same as playing in all kinds of famous schools. His understanding, understanding and logic are all the best.

In front of such a person, Song Beiyun gave a relaxed lecture, and Zhang Shangshu would ask carefully several times when he didn't understand.

After a while, it was already lunchtime, but the course of algebra was only less than one-tenth.

"Well... it's getting late, Lord Shangshu will have a meal in the Imperial City today."

Before he nodded, the door was opened. Miss Qing stood outside holding a bowl bigger than her head and shouted, "Dad, Master, it's time to eat. If you don't eat that braised chicken, you will be eaten up by the savory skin."

"Don't worry." Song Beiyun stood up and smiled, "Mr. Zhang, move?"

Shangshu Zhang was not polite, and he was very stylish. He was led by Song Beiyun to the canteen. Today, because Shangshu is here, the food is better than before. There are chickens, ducks, fish and meat, and some winter delicacies serve as vegetables. I think it has taken great pains to do it.

"Please go to the inner hall for meals." Song Beiyun said politely: "It's noisy outside, so as not to disturb the Lord."

"I am not such a spoiled person. I was able to endure hardships when I was studying." Lord Zhang refused Song Beiyun's invitation and walked to the place where I got a meal and watched: "Lord Song, the food in the Imperial City Department is quite good. I think the daily expenses are quite high, right?"

"Brothers work hard. If they can't eat well, they will have the strength to do things for the court."

"Well, it makes some sense."

Shangshu Zhang was just a formality. After all, the funds of the Imperial City Department were not provided by the Ministry of Works, but were just affiliated. It was clearly different systems, so he couldn't control it.

After the meal, Zhang Shangshu and Song Beiyun sat opposite each other and nodded slightly: "I didn't expect that Lord Song was not old, but he was well-organized. Even these ruffians could take care of them properly. I think that in the future, I would be the pillars of the court."

"Thank you, Lord Zhang, for your praise."

"A few days later, I will go to the government and tell the government that you will come to the Ministry of Works in the New Year. Don't you regret it? You should know that the Ministry of Works is a clean yamen."

Song Beiyun's eyes lit up at that time, and he stood up and bowed with his fists: "Thank you, Lord Zhang."

"It's not worth mentioning, but why does x need to be to the third power?"

Some people are martial arts illegitimate, some are flower illegitimate, and some are sound illegitimate, so naturally some are academic illegitimate. Zhang Shangshu can really be said to be born at the wrong time. His desire for knowledge is the most vigorous among the first and second ranks Song Beiyun has ever seen, and he is also the one who respects knowledge the most.

Maybe there are natural closeness between science and engineering. Anyway, Song Beiyun likes this little old man very much, and this little old man seems to be quite satisfied with Song Beiyun.

The biggest problem of this person may be that he is good at face, but it is no wonder that he is 60 years younger than him. He asked such a person to ask a person who is not much older than his daughter. As long as he is not a saint, most people cannot do it, let alone he is a minister! He is a minister, and when he goes down to the place, he will go out to greet the third-rank governor.

For the next day and a half, Song Beiyun spent all his time on this old man. He spent all day in Song Beiyun's office. In order not to affect Song Beiyun's office, he even squeezed a small table with his daughter to do the exam. The two of them discussed from time to time.

"Mr. Zhang, I will go back to my hometown to rest tomorrow. Maybe I will see you again after the New Year."

On the last evening before leaving, Song Beiyun sent Lord Zhang and Miss Qing to the gate: "I have also written down the exercises during the rest of my life, so you can have a good time."

Zhang Shangshu twisted his beard and chuckled: "That's not easy to pick it up."

"Stop bragging." Miss Qing snorted: "Today's questions are seven mistakes, five mistakes, and they are all low-level mistakes."

Zhang Shangshu immediately said silently. The old man's fatal hole was the daughter of this monster in his family, and that was useless at all.

After Zhang Qing finished talking about his father, he turned to look at Song Beiyun and said pitifully: "Master, you have to come back soon..."

"I'll go back after the rest." Song Beiyun said with a smile: "Okay, I'll send you off soon. Zhang Shangshu walked slowly on the road."

When the father and daughter left, Song Beiyun heard Zhang Shangshu scolding the Qing girl from afar, saying that she was embarrassed to say that kind of words. She had learned so long and could not even memorize a formula.

"It's really a pair of weird guys." Yan Shu walked out of the door: "These two days have made me so angry that I dare not come out."

"A studious man."

"But speaking of this, Zhang Shu was also known as a child prodigy back then. He was quick-witted but loved to do mathematics. If he recited poems and wrote them right, he would probably be no less than Li Taibai. But it was strange. If you were to be yours, you would not be able to accept them. They would think you were deviant and subvert the classics."

"Everyone has their own ambitions, and some things rely on talent. Besides, he is not a Confucianism, and his thoughts are obviously miscellaneous. Look at you, isn't it even a prodigy who is so useless?" Song Beiyun turned his head and said, "Please sort it out and go home for the New Year!"

"Oh, I'm really a genius!" Yan Shu chased after him unyieldingly: "You can't talk nonsense."

"Okay, okay, you don't have to send me tomorrow, it's only one month anyway."

"Do you think I like you very much? Leave early." Yan Shu looked at him with his hands behind his back: "In a few days, my family will come from my hometown to spend the holiday with my grandfather. Have you arranged your rotation?"

"Um."

"Be careful after you go back." Yan Shu whispered: "White lotus is rampant in Jiangxi. If you are the number one public enemy like you, you will definitely be killed if you find an opportunity."

Song Beiyun frowned immediately: "If you don't remind me, I really forgot about this and left."

After leaving the Imperial City, he went home directly, and there was no one else in the house except Xiaoyu. Zuo Rouqiaoyun was held in the mansion by Xiumu Duke Ding, and Jin Ling'er had no time to leave the palace. Miaoyan and Qiaoqiao went to buy New Year's goods, so the house was in a state of bleakness.

"Xiaoyu, go back to my hometown to celebrate the New Year with me tomorrow."

"Ah?" Xiaoyu was stunned for a moment: "This... is really OK?"

"That's natural." Song Beiyun laughed: "Leave you here alone? By the way, you go to Lao Wang's place later and ask him to borrow ten good players. Let's go on the road together, and all their expenses are mine."

"Is Lord Song worried about Bai Lian's revenge?"
Chapter completed!