After getting rid of the thief, I thought about finding a place to sit down and take a good look at the "Book of Ink", and accidentally saw Yan Luduan sitting in the pavilion opposite, looking intently at the bamboo slips.

The lake willows surround the embankment, the pond pavilion water pavilion, Yan Lu's expression is calm and peaceful, the hair covering the ears on both sides flutters in the breeze, looking at this intoxicating picture, a poem actually came out of my mind: The leaves are pale, the white dew is frost, the so-called Yiren is on the water side......

I reminisced about the artistic conception in this poem, and suddenly felt embarrassed, how could I think of this? Although Yan Lu looks soft, how can I say that when I sit there, I still have the aura of being a second-in-command, and often the more indifferent people are, the more deeply hidden, at least with my intuition! Thinking of this, I walked over and sat down quietly not far from Yan Lu, not wanting to disturb him, just wanting to wait for him to read a good book and ask him a few questions. I don't know much about the numbers in the six arts of Confucianism, so I have to ask first.

"Miss Ziyu, why don't you speak after sitting here for a long time?" I could see that he had already discovered me.

"Senior Brother Zilu, I have a question I want to ask. I stood up and took a few steps forward, giving a courtesy salute.

Yan Lu Meiyu stretched and smiled indifferently: "Miss Ziyu doesn't need to be formal, if you have any questions, you can ask." ”

"May I ask Senior Brother Zilu, what is the content of mathematics in the six arts of Confucianism?"

"Oh, Miss Ziyu is also interested in arithmetic?" Yan Lu looked at me, and the smile on his eyebrows deepened.

"This ...... Don't hide it from my brother, because I told the ovary that I wanted to test arithmetic, so I came to ask for advice, so I had to be prepared. Saying that, I thought about it again and added, "By the way, Senior Brother Zilu, when you meet the ovary later, don't tell him that I came to consult you, thank you! ”

Yan Lu smiled: "So what part of arithmetic does Miss Ziyu want to know?"

"Just talk about what you're learning. Hearing Yan Lu readily agree, I hurriedly sat beside him upright and listened carefully.

"The number of Confucianism is mainly learned in arithmetic, as well as the arithmetic of Shanggao. ”

"Shang Gao?"

"Shang Gao is a famous bachelor in the Zhou Dynasty, and Zhou Gong Ji Dan called him a good number. He often discussed mathematics with Zhou Gong, and he proposed that the method of numbers comes from the circle square. 'The circle is out of the square, the square is out of the moment' and the 'Pythagorean circle square diagram', as well as the method of using the moment to measure the depth and breadth of the sky. ”

"Ah, Senior Brother Zilu, did you just say Pythagorean?" I gestured with my fingers to the Pythagorean in the palm of my hand.

Yan Lu looked at it and nodded, "Exactly." Gou Guang three, stock repair four, diameter corner five. ”

"Three...... Four...... Five...... "I wondered, isn't this the Pythagorean theorem, the square of three plus the square of four is the square of five." I didn't think that this theory existed in the Zhou Dynasty, is this earlier than the West?

Yan Lu looked very serious and thoughtful, and said with a smile: "I didn't expect that Miss Ziyu is also quite knowledgeable, if you want to learn arithmetic, I will ask the disciple to help you send you a classic book for you to learn slowly." If there is anything you don't understand, ask me and the ovary are okay. ”

"En, thank you, senior brother~" I thought to myself, Yan Lu is really a teacher, and he is kind to others, although the content is boring, his words are soft and make people listen to it like a spring breeze, and naturally they don't feel bored. I thought about it again, this seal script is too obscure, and it looks tiring, why don't you ask Yan Lu to continue teaching me now, so that I can understand it faster. I respectfully and tentatively asked, "Senior Brother Zilu, can you tell me about the calculation now?" If you don't have time, it doesn't matter, I'll take the book and figure it out myself. ”

Yan Lu nodded, put down the bamboo slip in his hand leisurely, and said with a smile: "It's okay, I'll help you talk about the plan now." As he spoke, he picked up the pen next to him, spread out a blank bamboo slip, and showed me the process and principle of arithmetic.

Before he knew it, the sky was already crimson, and Shaoyu and the Confucian disciples on the other side laughed and said that they were going to the beach, and it seemed that Zhang Liang had finished class. Just as he was thinking of this, he heard Zhang Liang's clear and smiling voice coming from the other side: "Second Senior Brother, is Yun'er bothering you?"

When Yan Lu heard this, he got up and said with a smile: "Where, just ask some ......"

Afraid that Yan Lu would tell the truth directly, I hurriedly pulled the corner of Yan Lu's clothes to remind him. Yan Lu paused, slightly stunned, but quickly came back to his senses and said to Zhang Liang: "It's just to ask about some incomprehensible points in the Analects." ”

I looked at Yan Lu, and his expression seemed a little unnatural, and then I realized that my actions were inappropriate. Confucianism pays attention to whether men and women give or receive kisses, how can there be someone like me who pulls the corners of other people's clothes in a grand manner, and suddenly felt a little embarrassed, so he saluted and said goodbye: "Senior Brother Zilu, thank you for your advice, come back another day to ask for advice!"

Yan Lu also politely said: "Miss Ziyu, it's just a gesture, it's polite." ”

Zhang Liang stood at the end of the corridor of the Water Pavilion, and when he saw me coming, he walked side by side with me. We were all silent, each thinking about our own things, and after walking for a while, he suddenly asked, "Yun'er, you seem to have a good conversation with the second senior brother?"

At this time, I was thinking about the arithmetic I had just learned, so I replied unintentionally: "Hmm~ Senior brother is indeed a good teacher. ”

Zhang Liang paused in his footsteps.

I turned my head sideways, my eyes fell on Zhang Liang, and I saw that he looked strange and seemed to be thinking about something, and I began to think about it: What did he ask me just now? I can talk to the second senior brother very well?um~~~ I really feel that talking to Yan Lu is very cordial, but it seems that something is not quite right...... I replied for the people of Confucianism...... It doesn't seem to be... It's too explicit?!I suddenly feel ashamed, Zhang Liang won't think I like Yan Lu, right......

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[Note] The content of the mathematics of the six arts mentioned in this paragraph is that the landlord's own brain is not the official history, and the calculation is indeed a calculation method that existed in the pre-Qin period.