The three of them wandered slowly on the playground. Zhu Di asked some ideas about Jianxue from time to time. Fang woke up and answered them one by one.

"... the combination of learning and practice makes the students who go out have strong adaptability, get started quickly, and have strong learning ability. This is the student in Chen's heart."

Zhu Di nodded slightly. If Confucian students want to do practical things, they must first start from scratch. Therefore, every time those new scholars are arranged, the Ministry of officials is also a headache.

Finally, they compromised, so the Jinshi first had to observe politics, that is, practice, and then arrange specific work.

But even so, there are a lot of jokes. Otherwise, how can the staff and teachers' work be so hot in the future.

Someone once said that in fact, the ability of those officials is not as strong as their own staff, but he has an official pass - Imperial Examination background!

In the classroom, Ma Su saw Fang Xing and Zhu Di.

"The principle of thermal expansion and cold contraction is widely used in many aspects. Today we do a small experiment, and everyone is optimistic."

Masu brought up the burnt charcoal basin and showed a steel sleeve and a steel rod.

"Attention, everyone. This steel rod is thicker than the inner diameter of this sleeve. Please have a look."

Masu used the shaft sleeve to wear the steel rod, which was obviously unable to get in. Finally, he clamped it on a vice and couldn't get in by beating it with a copper hammer.

"Then let's heat the cover now."

Zhu Di outside asked Fang Xing, "what's the reason?"

Fang Xing said, "use the thermal expansion and cold contraction characteristics of the object, for example..."

"Look, this is a hot shaft sleeve. Now let's try the cold steel rod again."

Masu clamped the shaft sleeve on the vice, and then he didn't use a copper rod, but stabbed it with force.

"See? This is the expansion of the shaft sleeve after expansion."

"The principle of thermal expansion and cold contraction can be applied in many places. You can go to the workshop to test yourself after class. Your homework is to use the principle of thermal expansion and cold contraction to make a workpiece, a tightly matched workpiece."

At this time, the shaft sleeve gradually cooled down. Masu twitched hard with gloves, but it was useless.

"This is interference fit!"

Zhu Di's inspection ended when he saw that Ma Su couldn't beat the steel rod out of the shaft sleeve with a copper hammer.

Why did old Zhu smoke today?

Fang Xing doesn't understand, but there's no need to ask. Since Lao Zhu is here, what he represents must not be a bad thing.

Before Chu Di left, Jin Sili came with a gift.

Fang Xing received him in the reception room of the Academy.

Jin Sili's face was haggard for a long time. He said earnestly, "uncle, Nvzhen is arrogant. North Korea and its neighbors have been attacked. This time, Jin thought he wanted to seek the support of Daming, and then continued to harass North Korea. I beg uncle to mediate. Jin must be very grateful."

Fang woke up and yawned. Huang Zhong immediately said, "Lord Jin, as far as I know, this fierce brother Timur was driven out by your country, isn't he?"

Jin Sili said with a positive face: "nothing! The fierce brother Timur's department is cruel. The local people drive away evil spontaneously. Without the support of the people, they naturally can't stand it. So they went to find the family slave and want to make a comeback!"

Fang Xing said lazily, "Lord Jin is worried. As long as North Korea is loyal to Daming, there is no need to worry about the attack of the immortal, and... The immortal can't beat you!"

"Uncle, my country is small, the people are weak and the force is not obvious. It would be painful if I was rushed in by those barbarians!"

ha-ha!

Fang Xing rubbed his eyebrows and said, "it's a pity that Japan disrespects Daming!"

Jin Sili's face turned blue and white, and then said, "uncle, Jin is leaving."

Huang Zhong got up and sent Jin Sili out. When he came back, he said, "uncle, it seems that Jin Sili hit a wall in other places, so he wanted to ask you to blow the wind for your highness."

Fang Xing said with a smile, "the female immortal is not a fool. If she could beat the Koreans, she would have rushed over. So Jin Sili seems nervous. In fact, she wants to try Daming's attitude, and she still wants to continue to expand outward."

Huang Zhong said, "so uncle, you advised them to attack Japan, but they dare not!"

"Of course not. The best thing is to take down the opposite Horse Island."

North Korea has coveted Falklands for a long time, and Zong's family is flirting with North Korea, but they don't know that they have become fat in the eyes of others.

Fang woke up and prepared to go back. He said regretfully, "I want to see that fierce brother Timur. It's a pity that he didn't come this time."

As for what Fang Xing would do when he saw Meng brother Timur, Huang Zhong felt that it was unreliable.

"King Zhao is in Beijing."

Meng brother Timur didn't come, but there came a guy who made Fang wake up sick.

"The vassal cannot go to Beijing without his will, your majesty. What does that mean?"

Jia Quan, who came to report, said, "isn't it near the end of the year? Your majesty probably wants to have a family reunion."

Say!

Thinking of the Yin man Zhu gaosui, Fang woke up and felt a little tired.

Jia Quan didn't leave. He hesitated and said, "well... Uncle, your Highness the prince said, let you take the overall situation into account and don't mess around."

"Why am i fooling around? It's like someone on our side is impulsive. Your highness despises people!"

But as soon as Jia Quan left, Fang woke up and invited Xie Jin. He said murderously, "King Zhao has come to the capital. Today, first Li Xianzhong, then king Zhao, it seems that our news is not well informed!"

Xie Jin knew that the man had made hands with King Zhao several times behind his back, so he advised: "Your Majesty is here. You should restrain yourself so as not to get another meal on your ass."

……

Zhao Wang obviously thought so. After meeting Zhu Di, he went to TaiFang to meet his brother and sister-in-law.

Wan Wan didn't like the smiling third uncle, so she stood beside the princess.

"Big brother looks thin."

After the ceremony, Zhu gaosui said sincerely, "my sister-in-law has also reduced a lot. My little brother is incompetent and far away from my father and emperor, which makes my brother and sister-in-law suffer."

Zhu gaochi touched his fat face and said with a smile, "you have also suffered in Peiping. You can live more time in Beijing this time, or make your father feel more comfortable."

Among Zhu Di's three legitimate sons, Zhu gaochi can't like it. Zhu gaoxu has no mind. Only Zhu Laosan is the youngest and has a sweet mouth. He has been deeply loved by Zhu Di since childhood.

Zhu gaosui looked lovingly at Zhu Zhanji's brothers and sisters: "I haven't seen him for a long time. Zhan Ji has grown much taller. Zhan Yong is also good. Looking at the more bookish spirit, it can be seen that he has worked hard and wan wan..."

He was also the third, but Zhu Zhanyi was forgotten. Zhu gaosui directly looked at Wan Wan and said happily, "Wan Wan is about to become a big girl. My sister-in-law is so lucky!"

The crown princess took Wan Wan and said faintly, "I don't dare. Peiping is the blessed land of the father and the future capital. King Zhao is a good blessing!"

Zhu gaosui's smile remained unchanged. After saying a few more words, he left.

Zhu gaochi was still smiling. The Crown Princess couldn't help but say, "Your Highness, King Zhao has a lot of affairs in Peiping. How can he stay in Jinling for a long time?"

Zhu gaochi was slightly stunned. Zhu Zhanji hurriedly said, "mother, there is no need to tangle about this. Grandpa Huang is not sure when he will have to go back to Peiping."

The length of Zhu Di's time in Jinling surprised all civil and military officials and the people of the Ming Dynasty.

Zhu gaochi said, "Peiping costs a lot. My father probably wants to stay in Jinling and be more confident when the Northern Expedition again."

Where the emperor is, the consumption is great.