Time flies by, and two weeks have passed in the blink of an eye.
Zhu Zaijing has been paying close attention to the various equipment of the Beijing Camp these days. After eliminating what should be eliminated and repairing what should be repaired, the equipment of the Beijing Camp is finally acceptable.
The reports at the border did not stop either. Just at the beginning of February, we received reports of Tumut troops raiding the border, but fortunately they did not cause large-scale casualties.
Tumut tribe, after the leader of the Tatar tribe, Batu Mengke, unified the various tribes in Mongolia, he divided 60,000 households, one of which was the Tumut tribe.
Batu Mengke is the grandfather of Ada Khan.
Zhu Zaijing would be so angry that he itched his teeth, and silently wrote down this account in his heart.
"Sooner or later, I will come back to you to pay back the debts I have incurred over the years!"
On this day, Zhu Zaijing found another father and son to meet.
Juhoutan! And his legitimate son Zhu Zaiyu!
Yes, these two people are members of the clan.
Zhu Houtan and Jiajing are both of the same generation, the vassal kings of Zheng Fan!
The fifth generation of King Zheng.
He had previously written to Taoist Master Jiajing, urging him not to take elixirs and become superstitious in cultivating immortality.
As a result, he was demoted to a commoner by the evil Taoist priest and imprisoned behind a high wall.
After Zhu Zaijing ascended the throne and granted amnesty to the world, he was released, and Zhu Zaijing also restored his title.
But the focus of Zhu Zaijing's meeting today was not him, but his son Zhu Zaiyu.
Zhu Zaiyu, speaking of scientists from the Ming Dynasty, this one can be compared with Xu Guangqi, Song Yingxing, Li Zhizao and others!
He not only made achievements in music and calendar, but also had in-depth research in mathematics, astronomy, metrology, etc.
The creation of the Twelve Equal Laws (New Law of Secret Law) is Zhu Zaiyu's greatest and most famous achievement.
In his research on the law of twelve equals, Zhu Zaiyu used an abacus to perform square root calculations with an accuracy of 24 decimal places! He designed his own extra-large abacus with 81 gears, and finally solved the thousand-year-old problem of the law of twelve equals.
He also had other achievements: he was the first to use an abacus for square root calculations; he completed the decimal conversion between nine and decimal systems; he found the solution method and formula for the four-term geometric sequence for the first time, etc.
"Your Majesty, Zhu Hounan (Zhu Zaiyu), comes to see you!"
"Prince Zheng, please get up! Your Majesty, please get up too!"
"Thank you, Your Majesty!"
Zhu Zaijing looked at the lean faces of his father and son with mixed feelings in his heart.
During the years when Zhu Hounan was imprisoned, Zhu Zaiyu, the crown prince, was also implicated. He only lived in a mud house and concentrated on his research.
From the 29th year of Jiajing to the first year of Longqing, it has been 16 years.
"Zheng Fan's palace has been abandoned for a long time. I have ordered it to be restored. Until then, you can live in the capital!"
There are mansions in the capital specifically for the feudal lords to stay when they come.
"I thank you, Your Majesty!"
The father and son, who have been tortured over the years, have become very cautious.
"You don't have to be afraid. I also remonstrated with the late emperor's behavior many times. If he hadn't left me as his only son, my experience would not be any better than yours!" Zhu Zaijing said.
Telling others about the same experiences can bring you closer, right?
Of course, Zhu Zaijing had never really done that. Jiajing was eager to cause trouble for him every day, and it was too late to hide himself.
"Prince Zheng, please take good care of yourself during this period. I will send an imperial physician to take your pulse!"
"Your Majesty, I know you are eager to learn. If you have any books you want to read, tell me and I will get them for you!"
"Thank you, Your Majesty!"
The three of them ate together and chatted. Zhu Hounan and his son looked at Emperor Li Xian's corporal, and slowly let down their guard.
After eating, Zhu Zaijing finally revealed his purpose.
"Let's go! I'll show you something!"
Zhu Zaiyu is so talented, and Zhu Houxan is not far behind. Works such as "Cao Man Ancient Music Score" and "Revolving Palace" were completed by the joint efforts of father and son.
In the Zhu family, not only the emperor had various hobbies, but also the vassal princes.
There are those who love literature, such as Shen Wang, others who love botany and medicine, such as Zhu Ju, and those who improve tea culture, such as Zhu Quan, etc...
"Your Majesty, this is..."
Zhu Zaijing took them to a remote room.
Zhu Zaiyu saw square objects with various colors.
"Smell it!"
Zhu Zaiyu took a piece and smelled it.
"It's the scent of osmanthus!"
"There's also something with orchid scent here!" Zhu Hounan said, holding a piece in his hand.
"This is soap!" Zhu Zaijing explained.
"Paper?" Zhu Zaiyu asked subconsciously.
Soap was not an extremely scarce thing in ancient times. There were relevant records in the Song Dynasty. Soap technology improved a lot during the Ming Dynasty.
But the production is rough, and there are all kinds of strange things in it. It has a cleaning effect, but the smell...
Li Shizhen's "Compendium of Materia Medica" records soap in the Ming Dynasty.
Zhu Zaijing only slightly modified some production methods based on the memories of later generations, and then added some pigments and spices, and these soaps were created.
Of course, this is still crude compared to later generations, but it is enough for this era.
"What does this thing do?"
"Take a bath!" Zhu Zaijing said with a smile, "You can wash your body just like Yizi (pig pancreas soap), but this soap only comes with various colors and fragrances!"
Zhu Zaijing secretly arranged for someone to do this the next day after he traveled through time.
We have already written Chapter 76, it’s time for me to make some inventions, right?
Zhu Hounan and Zhu Zaiyu looked at these soaps with surprise and couldn't put them down.
Technology geek Zhu Zaiyu has been silent since he entered the palace, but when he saw such novel things, he became as happy as a child.
"Your Majesty is so talented!" He said with a soap in his hand, "How on earth did you make these!"
He is indeed a scientist, with a strong curiosity for novel things.
"Do you want to learn? I'll teach you!"
"No, no, no!" The latter quickly shook his head, "That's not what I meant. I'm just curious about how it was made. I have no other thoughts!"
"Hahahaha! You don't have to be cautious!" Zhu Zaijing patted him on the shoulder, "These days in the capital, you can enter the palace every day as long as you want. I have many interesting things to do with you!"
Among the scientists that Zhu Zaiyu could name, the only one who could be used at this time was Zhu Zaiyu.
Li Zhizao is only two years old now, Song Yingxing will be born in 20 years, and Xu Guangqi is only two years old now.
Zhu Zaijing believed that he could guide this prince, who was of the same generation as himself, to slowly become the leader of the rise of science in the Ming Dynasty.
Coupled with his tech geek personality, he is really suitable for that kind of laboratory work.
Historically, perhaps because he was stimulated by his father's imprisonment, or more likely because he disliked complicated interpersonal relationships and concentrated on research, Zhu Zaiyu wrote to the court repeatedly and finally resigned from his title.
A man who gave up his throne for science.
