In the middle of winter, Zhu Cihong took the General Staff from Jinan to Hanoi County, where the Huaiqing Prefecture was located.

Huaiqing Mansion is located in the south of Taihang Mountain, which is the area of Jiyuan, Qinyang and Jiaozuo in Zhu Cihong's previous life. Because of its insufficient economic equivalent, Zhu Cihong did not even have the slightest impression of these places in his previous life. In this life, I personally went to Huaiqing Mansion, and I knew that this is actually a prosperous place in the Central Plains, and the cultural heritage is deeper than that of Jifu.

Huaiqing Mansion was a fief of the Zheng Domain. Zheng Guo originated from Zhu Zhanjun, the second son of Renzongshu, who was first sealed in Fengxiang Mansion and moved to Huaiqing in the ninth year of orthodoxy. This clan has fifteen counties before and after, and it can be regarded as a major branch of the clan.

It was also King Zheng's line that allowed Zhu Cihong to eliminate his prejudice against his relatives.

Once upon a time, Zhu Cihong also felt that those mean people in later generations had a point: the Ming Dynasty's clan was like raising pigs.

In the entire Chongzhen Dynasty, the last vassal kings such as Fu, Zhou, Qin, and Jin did play a very disgraceful role, and even insulted the name of "pig".

However, it is really too much to completely regard the entire Ming clan as a "pig". Let's not talk about the contributions made by various clans to the continuation of Chinese civilization in terms of book collection, only to say that the "Materia Medica for Saving the Famine" compiled by Zhu Hu, the king of Zhou, is still playing a role today, and was incorporated into the "Complete Book of Agricultural Administration" by Xu Guangqi, saving countless people.

"Duanjing Shizi is not only an outstanding figure in my Zhu Ming Dynasty, but his achievements can be ranked among the three tripods even if they are placed among the princes and princes of China for two thousand years." Zhu Cihong walked slowly in King Zheng's mansion, followed by a middle-aged man in his forties. 、

Judging from the color of this man's clothes, he is in the county king. However, judging from the dishes on his face, it looked like he had just suffered a great deal of hardship, and he finally got rid of the risk of starvation.

This person is the grandson of Zhu Zaiyu, the son of Duanjing, Zhu Changjie, the king of Dongyuan.

"Your Highness......" Zhu Changjie's voice was choked, and his eyes were red. He expressed his gratitude to the crown prince for his grandfather's admiration.

"As the grandson of the son of Duanjing, how are you compared to your eldest father in terms of law, calendar, and arithmetic?" Zhu Cihong asked with a smile.

"Shame on you!" King Dongyuan hurriedly bowed down and said: "Although the minister has been strictly instructed by his family since he was a child, he has learned "Music Rhythm" and "Sutra", but his qualifications are foolish, and he can only be regarded as reading through so far, and he does not dare to say 'fine'. I dare not compare with my ancestors. ”

"Don't be humble." Zhu Cihong said: "If Duanjing Shizi knew that his descendants could defeat him, he would be very happy. ”

"It's not that the minister is arrogant," Zhu Changjie said, "It's just my grandfather's talent, and he is not an unborn person, and I'm afraid that no one can match it in the past hundred years." ”

Zhu Cihong nodded and smiled, but felt that it made sense.

Sometimes diligence can bring people closer together, but after a certain point, there is an insurmountable barrier between mortals and geniuses. Just like Zhu Zaiyu. It's not hard work that can get closer.

As a liberal arts student four hundred years later, Zhu Cihong has always felt that his understanding is quite good, and he has also spent time studying several classic works of Zhu Zaiyu, which can be said to be understandable with the help of the lecturer of the East Palace, but he is powerless to push it further.

Joseph Needham, the author of "The History of Chinese Science", compared Zhu Zaiyu with Li Shizhen, Song Yingxing, Xu Guangqi, and Xu Xiake, which is by no means an exaggeration.

In the eyes of Zhu Cihong and others. Zhu Zaiyu is even greater than these four scientific promoters.

He was a trailblazer of science.

In mathematics, Zhu Zaiyu pioneered the use of abacus to open squares. He studied the equation of the number series, solved the first term, the last term and the number of terms of the known proportional series for the first time on Shijie, and solved the decimal conversion of different carry systems, some of which were used until 400 years later, laying the foundation for the birth and development of physics and chemistry.

In terms of econometrics, Zhu Zaiyu has extremely detailed investigations and physical experiments on the relationship between ancient money and weights and measures. In particular, the study of the changes in weights and measures over the centuries has influenced later generations. He proposed a series of calculation methods and formulas for nozzle correction. Mercury density was also accurately determined.

In terms of the astronomical calendar, Zhu Zaiyu believed that the calendar at that time was not very accurate in calculating the length of each year, and after his careful observation and calculation, he found a formula for calculating the length of the regression year. In 1986, astronomers used modern high-tech surveying methods. The results of Zhu Zaiyu's calculations in 1554 and 1581 were verified. The verification found that the length value calculated by Zhu Zaiyu for 1554 years was only 17 seconds different from today's calculation, and 21 seconds for 1581.

He was also the first person in Chinese history to accurately calculate Beijing's geographical location.

As for the twelve equal temperaments he created, he was brought back to the West by missionaries, and thus helped Bach invent the piano, which became the standard tuning for later generations...... In front of Zhu Zaiyu's astronomical and mathematical achievements, it is not particularly outstanding. Then there is the "World Peace Dance" invented by him, which was the first group gymnastics; The dance education curriculum and music education system developed will be used by future generations into the foreseeable future...... These are just the end of his contribution to human civilization.

……

"The country of Jiashen has changed, and the whereabouts of King Zheng are unknown." Zhu Cihong zhanzhu walked around, looked around the deserted courtyard, and said: "I have the heart to enlighten the imperial father, I want you to attack the prince of Zheng, are you willing?" ”

Zhu Changjie was just stunned, and then knelt on the ground, his throat rolling, and he couldn't speak for a while. He knew that the crown prince summoned him because of the face of Duanjing Shizi, but he didn't expect that he would have the idea of letting him attack Prince Zheng. The king of a feudal domain is a real nobleman and a family member of the Son of Heaven, while the king of the county can only be regarded as a distant relative and regarded as a courtier. In a patriarchal society, these are two distinct classes.

"Your Highness's love, it is difficult to repay the minister!" Zhu Changjie said: "It's just Your Highness, Zheng Wangjue is the ancestor of the family, the temple lord issued a decree to praise, and ordered the minister to inherit the Dongyuan State Sheji, how dare the minister go against the ancestors' intentions?" ”

There is a family story between the Zheng royal family and the imperial family.

Zhu Zaiyu's grandfather, Zhu Youyu, originally succeeded as the king of Dongyuan, and later inherited the Zheng Wang domain. His father, Zhu Houhan, was crowned King Zheng in the sixth year of Jiajing, and was known for his frugality, integrity, and erudition. In the twenty-ninth year, Zhu Houhan was sparse and admonished Emperor Jiajing to repair the truth and mislead the country, and Emperor Jiajing was furious and sent the envoy of Zheng Guo to prison.

It was at this time that Zhu Youlu, a member of the Mengjin Shu, took the opportunity to go to Emperor Jiajing, impeached Zhu Houhan for the forty major crimes, and took the crime of treason as the first accusation, almost putting him to death.

The rebellion of the vassal kings of the Ming Dynasty was not without precedent, but it was not so loud that the wind was rain. Therefore, Emperor Jiajing went to Zheng Guo for a hearing with a horse and a lieutenant official. His repetition of King Zheng is not guilty of rebellion, but there are such transgressive behaviors as "the name of the palace room" and "planning to take advantage of public opinion". Therefore, Jiajing cut off the prince of Zhu Houhan, demoted him to a concubine, and sent it to Fengyang, where he was imprisoned by a high wall.

It was not until the first year of Longqing that the court rose up to rehabilitate the wind, and Zhu Houhan restored the title of King Zheng, and at the same time added 400 Shi Yulu and returned to the Huaiqing Palace.

In the nineteenth year of Wanli, Zhu Hou, nicknamed "Gong", was King Zheng Gong. Zhu Zaiyu, as the eldest son of King Gong, should inherit the prince. Moreover, when Zhu Zaiyu was imprisoned in Fengyang by Zhu Houyan, he built an earthen house outside the palace on the grounds that his father was innocent and his son could not enjoy himself.

However, since the nineteenth year of Wanli, Zhu Zaiyu has been sparse with Emperor Wanli seven times in succession, asking to resign from the country, which is also the allusion of "Seven Sparse Resignation from the Country".

The reason why Zhu Zaiyu insisted so much was because of another public case within the Zheng royal family.

That is the entanglement between the Mengjin royal family and the Dongyuan royal family.

At the beginning, Zhu Qiqiang, the king of Zheng Jian, had ten sons, among which the son Zhu Jianzi was the future king of Zheng Xi; the second son died young; The three sons of the alliance are Gongyi Wang Zhu Jianwei; The fourth son, Dongyuan Duanhui Wang Zhu Jian?? ——Zhu Houhan's grandfather, Zhu Zaiyu's great-grandfather.

At that time, the mother of Zhu Jianhao, the king of Mengjin, was favored by King Zheng Jian and wanted to seize the heir seal for Zhu Jian, but failed. Later, Zhu Jian stole the golden book of his deceased son, and King Zheng Jian claimed it back, so he complained about his father and no longer saw King Zheng Jian, and his behavior became worse and worse.

King Zheng Jian played the Emperor Chenghua, so that Zhu Jianjun was dismissed as a concubine, so he was called "Mengjin Wasted People".

Later, Zheng Kangwang Zhu Youfang, Zhu Jianzi's son-in-law, died without children. At this time, the nearest prince of Zheng Wangfan's bloodline has died, and according to the order of eldest and youngest, Zhu Youlu, the son of Zhu Jianhao, should be the heir of King Zheng. But because Zhu Jianwei was guilty and was abolished, he set up another Dongyuan Duanhui King Zhu Jian?? The son of Zhu Youwei is King Zheng and is King Zheng Yi, that is, Zhu Houhan's father and Zhu Zaiyu's grandfather.

In the twenty-ninth year of Jiajing, Zhu Youlu asked for the title of King of Jinjun in the Alliance, and wanted his nephew Zhu Houhan to play for him as King Zheng. However, Zhu Houhan had just offended Emperor Jiajing and thought that it was not appropriate to ask for a seal at this time. Zhu Youlu resented Zhu Houhan because of this, so there was a big case of accusing Zhu Houhan of rebellion.

In the nineteen years that his father Zhu Houhan was imprisoned in the high wall, Zhu Zaiyu devoted himself to studying, not only has a high attainment in science, but also has an increasingly deep belonging to the humanities. So when it was his turn to inherit the title, he wanted to completely settle the grievances of his clan and relatives, and resigned seven times and refused to attack the title. Even when Emperor Wanli wanted to make his son King Zheng, he insisted on refusing to accept it, and finally gave up the title of King Zheng to Zhu Youlu's grandson Zhu Zaiyi, completely resolving this family grievance that lasted for the fifth generation.

Zhu Zaiyu finally lived his life as the son, and his grandson, Zhu Changjie, inherited the title of King Dongyuan in the eighth year of Chongzhen.

This is also Zhu Changjie's so-called unwillingness to go against his grandfather's heart.

Since Zhu Houhan, this lineage has been more inclined to literature and science, and it is satisfied to inherit a county king, and it is no longer willing to participate in any battles. Now that King Zheng's whereabouts are unknown, what if he returns? Rather than make another storm, it is better to refuse it. (To be continued......)

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