Zhang Chuchu's father's name is Zhang Yukuan, during the Wude period, he worked under the door of Wang Xiaotong, the official worshiped Dr. Arithmetic, and was an unknown petty official, mainly responsible for astronomical calculations.

Zhang Yukuan has talent and learning, fine mathematics, is the Jin Dynasty great mathematician Zhang Qiujian, the ancestors left Zhang Qiujian's handwriting, "Zhang Qiujian Sutra" three volumes, Zhang Yukuan has a deep study of this. He is also quite accomplished in astronomy and arithmetic.

It stands to reason that an official with real talent like him will be reused by the imperial court sooner or later, and he will never stay too long in such a small position as a doctor of arithmetic. However, Zhang Yukuan has never had the opportunity to be promoted.

Zhang Yukuan is indifferent, not good at making friends and catering to powerful people, and belongs to the kind of intellectuals who specialize in research. So his career was not very smooth in that era of relying on background and relationships, and he worked under Wang Xiaotong for six years, but he was still just a small official with a sesame size.

Until the ninth year of Wude, after the Xuanwumen Incident, the prince was executed, the political situation in the court and the central government had a major shock, many ministers and officials fell one after another, and even Zhang Yukuan, a small official, was also affected, because he was found to have some connection with a former minister, Yu Zhenguan was demoted home in the first year.

On the way home, Zhang Yukuan was depressed, and his physique had been lacking exercise, so they couldn't afford to fall ill when they passed through Xiaoxinzhuang in Sanyuan County, but fortunately they were taken in and rescued by Zhang Porliang, who met kindness at that time. Since then, the father and daughter have lived in Zhang's house. During the period of recuperation, Zhang Yukuan saw that Zhang Chuwen, a boy from the Zhang family, was intelligent, understood etiquette, and had a very good temper, so he moved to accept the apprentice. One is to repay Zhang Porliang for saving his life, and the other is to leave a successor for himself. The arithmetic of the Zhang family cannot be buried here.

However, Zhang Chuwen's performance disappointed Zhang Yukuan, although Zhang Chuwen was smart, he was not very sensitive to numbers, and he didn't know anything about calculations, calendars and the like. No matter how Zhang Yukuan taught, Zhang Chuwen couldn't remember the essentials, but Chu Chu, who was playing on the side, could quickly understand it after listening to it once.

After several teachings to no avail, Zhang Yukuan had to admit that arithmetic also requires talent. He died teaching Zhang Chuwen the study of arithmetic. Let him specialize in literature and history, and make a name for himself in the future, he can be regarded as worthy of Zhang Porliang's life-saving grace.

As for arithmetic, Zhang Yukuan set his sights on Chu Chu, who was only five years old at the time. Perhaps because of genetics, or family history, or the influence of Zhang Yukuan since childhood, Zhang Chuchu's ability to understand mathematics and convert in practice often amazes Zhang Yukuan. When he taught Zhang Chuchu arithmetic, the words that often hung on his lips were 'Hate Chuchu is not a man!' ’。

Since then, Zhang Chuchu has studied mathematics, Zhang Chuwen has studied literature and history, and under the teaching of Zhang Yukuan, a great talent with poetry and books, he has been studying for two years.

In the second year of Zhenguan, Zhang Yukuan died of a long-term illness and died in mid-March at the age of Chinese New Year's Eve. At that time, Zhang Chuchu was only seven years old. At the age of seven, seeing the death of his biological father, the pain can be imagined.

After helping to bury Zhang Yukuan, Zhang Porliang and his wife took pity on Chuchu's young age and adopted her as a righteous daughter in the second month, and since then he has been known as a brother and sister with Zhang Chuwen. At that time, Zhang Chuwen was ten years old, and he had already learned a little talent in a private school, which was highly praised by his husband. Zhang Poliang and his wife knew that this was Zhang Yukuan's credit, and they loved Chu Chu more and more, and they always regarded it as their own. Zhang Chuwen also loved this sister very much, and knew that Chu Chu liked arithmetic, so he often found books of arithmetic from Mr. Private School for Chu Chu to study.

Zhang Chuchu has always been well-behaved, knows how to repay kindness, knows filial piety since he was a child, and often helps Zhang Liu's family to breed silkworms and tidy up housework. The two elders are happy. Deeply loved by Zhang Xiaoliang and his wife. Lao Zhang and his wife are even closer to her than to their own son.

In the eighth year of Zhenguan, Zhang Chuchu has become a big girl who is loved by everyone, and she has also reached the age of marriage. The number of people who came to the door to propose relatives gradually increased, and there were many literati who came from the tomb. It's just that Zhang Chuchu didn't have the heart to marry at that time. First, she wants to serve Lao Zhang and his wife for a few more years to repay their kindness in the past few years. The second is that she wants to find a husband who can inherit her father's legacy and pass on their Zhang family's arithmetic learning.

From this, there is the reason for Chu Chu's three questions to determine the husband.

Most of Zhang Chuchu's questions are arithmetic, most of which are difficult problems in the three-volume "Zhang Qiu Jian's Book of Calculations", and few people can answer them. She also took this opportunity to postpone the marriage again and again, for two years, and the number of people who came to propose marriage became fewer and fewer, and in the last year, there was not even a matchmaker willing to come to the door to propose again. Zhang Xiaoliang and his wife began to be anxious for her. The woman was sixteen and unmarried, and it was already a long-standing problem at that time. If it drags on longer, how can anyone marry her again?

At this point, Zhang Chuchu and Liu Yiyi fell to the ground very well, one is eighteen unmarried, the other is sixteen unmarried, both of them are big difficulties. So when the third aunt came to propose marriage for Zhang Chuchu, Zhang Porliang was so happy that Xuan didn't jump up. He has seen Liu Yiyi, he understands etiquette, has ability, and his appearance is reasonable, if his daughter can marry him, it will be a good home.

So since the third aunt left, Zhang Xiaoliang and Zhang Liu have been persuading Zhang Chuchu, hoping that she can give up the topic, and at the very least, reduce the difficulty of the topic. Zhang Chu was very satisfied with Liu Yiyi's virtue of sending cattle last time, so he also said a lot of good things for Liu Yiyi on the side. made Zhang Chuchu also have a trace of curiosity about Liu Yiyi.

When Liu Laoshi took Liu Yiyi to the door to propose, Zhang Chuchu hid behind the curtain and watched secretly, Liu Yiyi was not very tall, but he was very steady standing there, looking at him made people feel a sense of steadiness. And this feeling, Zhang Chuchu only experienced it in his father when he was a child.

"Liu Gongzi is very similar to my father," Zhang Chuchu gently sat down opposite Liu Yiyi, his beautiful eyes flowed, and he looked at Liu Yiyi with nostalgia: "Pure, elegant, inactive, confident." is talented, but he doesn't like to show it. And in terms of arithmetic, Liu Gongzi is even more proficient than my father. ”

"So, Chu Chu didn't want to deceive his son. The special cheekiness will inform the life experience here, so as not to have remorse after the marriage in the future. ”

Liu Yiyi has been listening and watching quietly, Zhang Chuchu's voice is very soft, he does not speak slowly, and he sounds very comfortable. It's just that Liu Yiyi didn't expect Zhang Chuchu to have such a miserable life experience. Lost his parents at a young age and has been fostered under the fence of others. Then there must be countless pains in her heart?

Looking at the thin body in front of him, Liu Yiyi couldn't help but feel a trace of pity in his heart.

He put the tea bowl on the table, looked at Zhang Chuchu deeply with his two eyes, and said in an extremely firm tone: "Miss Chuchu, although I am a farmer, I am also a man who stands up to the sky, what Liu has said and done, I will never regret these two words!" ”

Hearing this, Zhang Chuchu lowered his head and clasped his hands together. His face was flushed.

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