I

Fang Yizhi was thrown into the Public Works Department and served as Song Yingxing's assistant.

Song Yingxing was also inspired by Zhao Han about physics, but he was too busy with official duties and was not as interested in studying physics as Fang Yizhi.

If the two of them stay together, they should be able to create some sparks.

Regarding physics, Zhao Han could only remember the knowledge from junior high school. He had forgotten most of the high school physics knowledge and could not remember even a single high school physics formula.

He can only inspire and teach the methodology of studying natural science.

Fang Yizhi was in a state of madness, studying mechanics all day long. In less than half a month, this guy made his own dynamometer and asked a craftsman to make it.

Song Yingxing expressed his displeasure, saying that Fang Yizhi was not good as an assistant and would be distracted during working hours.

Zhao Han simply established specialized institutions, namely the Hanlin Academy, the School of Mathematics, and the School of Physics.

This Hanlin Academy is not that Hanlin Academy.

The Hanlin Academy of the Ming Dynasty was a preparatory institution for senior central cadres.

Zhao Han's Hanlin Academy is purely an academic institution.

Studying Datong theory, compiling the correct pronunciation of Datong, determining standard characters and dictionaries in the future, and even re-editing primary and secondary school textbooks, or compiling the "History of the Ming Dynasty" after the fall of the Ming Dynasty, all these tasks were handed over to the Hanlin Academy for execution.

Hanlin Academy officials are not allowed to participate in politics, let alone be transferred to official positions with real power!

The three academies of Hanlin, Mathematics, and Physics are temporarily under the direct jurisdiction of Zhao Han.

The Institute of Physics is the most miserable, with only Fang Yizhi alone.

Zhao Han ordered him to select twenty students to help Fang Yizhi conduct experiments and study with Fang Yizhi at the same time. These students are not paid, but are provided with food and housing.

There are so many houses in Xu Guogong's house in Nanjing that will be allocated to various institutions in the future. For example, Wanzhuyuan is arranged to be the site of the Institute of Physics. The environment is absolutely elegant and ensures that researchers can be physically and mentally happy.

"Headquarters!"

Another day, Fang Yizhi took out the schematic diagram, pointed at the drawing and said: "The object itself remains stationary because the forces are balanced. Take this square inkstone as an example. It has its own gravity of falling, and the table top gives it an upward force. Lifting force. When the lifting force and gravity are the same, the inkstone can remain motionless. Just like when a person steps on a mire, it will sink downward due to gravity. The deep footprints are caused by the person's gravity. When the mire is stepped on, , the lifting force of the ground can offset the gravity, and the person will not stand still."

Zhao Han asked with a smile: "So, what general rule did you come up with?"

Fang Yizhi replied: "All things think of tranquility. Any object will definitely remain motionless when it is subject to a balancing force or is not subject to external forces."

Zhao Han crumpled Fang Yizhi's drawings into a ball and threw it out at random: "What force did this paper ball receive?"

Fang Yizhi re-drawed the picture, thought carefully, and kept writing down the forces: "It is subject to the force of the general throw and its own gravity. When these two forces are combined, the paper ball will fall forward."

"Really?"

Zhao Han took out another piece of paper, without crumpling it into a ball, unfolded it and threw it out, and asked: "These two pieces of paper are of equal weight, and the force I throw is about the same. Why does one throw far and the other Close?"

Fang Yizhi thought hard.

Zhao Han picked up a book and used it as a fan to fan Fang Yizhi: "Do you feel it?"

"Wind." Fang Yizhi replied.

Zhao Han asked: "Your hair moves with the wind, and what force does it receive?"

Fang Yizhi's eyes widened: "Wind is the movement of Qi, and Qi is a real thing!"

Fang Yizhi's understanding of wind in "Little Knowledge of Physics" is: Yin and Yang are driven by each other to move the air, and ventilation can create wind.

Zhao Han smiled in approval.

Fang Yizhi added on the drawing and said: "The paper ball still has the resistance of air. When the resistance is balanced with the force of the general throw, the paper ball will no longer be... wrong!"

From Newton's first principle to Newton's second principle, Fang Yizhi was instantly confused. He felt that this problem was very complicated.

Zhao Han smiled and said: "I don't want to think about this for the moment. If my desk is extremely smooth and there is no resistance at all, will the inkstone still stop when I push it?"

Fang Yizhi thought seriously, shook his head and said, "No, the inkstone will keep moving forward."

"Then your previous conclusion was wrong. Things do not remain stationary, but remain unchanged in their original state." Zhao Han said.

Fang Yizhi nodded: "Indeed."

Zhao Han said with a smile: "How about calling this representation of things 'inertia'? The nature of habit."

"Yes."

Fang Yizhi felt that this issue could be further investigated, so he handed over his hand and said: "General Town, I'll take my leave first and go to sort out the cause and effect."

"Go." Zhao Han felt very pleased.

When Fang Yizhi walked to the door, Zhao Han suddenly shouted: "If you come up with any more results, you can invite people from the School of Mathematics and let them go to the School of Physics to have a look. Maybe we can get a few more like-minded people."

"Yes!" Fang Yizhi bowed and resigned.

Zhao Han leaned back in his chair and closed his eyes to rest. Physics research finally had a practitioner. He believed that if the fire was ignited, it would surely spread.

It's time to head to Nanjing. After the summer harvest, we will send troops to Jianghuai. The location of Ji'an is really a bit remote.

The General Military Mansion also had to be changed. Not to mention establishing himself as a king, at least it had to be upgraded to the Governor's Mansion. Zhao Han decided to call himself the "Generalissimo of the World's Soldiers and Horses".

This position is comparable to Zhu Houzhao's "Governor General Military Affairs Mighty General Chief Military Officer"!

…

The thirteenth year of Chongzhen was destined to be extraordinary.

The Manchu and Qing troops had been surrounding Jinzhou for half a year and were arrogantly immigrating to farm outside the city.

Zu Dashou has been holding on to Jinzhou City and shows no signs of surrendering.

How could he surrender?

The ancestral family has a great business in Liaodong, and can be said to be the emperor of Liaodong. Surrendering means losing one's basic base.

Unless they run out of ammunition and food, there is no way to survive.

Next to Jinzhou City, there are Songshan Fort where Wu Sangui is stationed and Liu Zhouzhi is stationed on Xingshan Fort.

Wu Sangui was now panicking. He only had 3,000 soldiers in his hand, and Zu Dashou was besieged for half a year under his nose. He kept asking for reinforcements from the imperial court, but not only did the imperial reinforcements not arrive, but the military pay was completely wiped out.

Throughout Liaodong, Chongzhen sent people one hundred thousand taels of silver.

There's no point in raising money, the court really has no money.

The generals in Liaodong suddenly became loyal and patriotic. Alas, if you don't give military pay, don't give it to them. The battle will still have to be fought, and surrender is impossible.

As long as there is still the slightest hope of becoming a local emperor, who the hell is willing to be a dog to the Manchus?

Liaodong has already allowed the establishment of regiment training. Wu Sangui's father, Wu Xiang, is serving as the chief soldier of Ningyuan regiment training at this time.

There is more than one Ningyuan regiment training general, Jin Guofeng also holds this position, and Wu Sangui is applying for this position. Anyway, these Liaodong generals, faced with the arrogance of the Tatars, spent their own money to recruit troops to fight.

Once they surrender, they are nothing.

They did not take the Ming Emperor seriously, and they also did not want to seek refuge with the Manchu Qing Dynasty. Their own interests always came first.

Just when Jinzhou was besieged for half a year, Subandai (a Mongolian) stationed at the Xingshan Beacon Tower secretly wrote a letter hoping that his entire family would join the Manchus.

The Manchu general Jierhalang only led 1,500 men to respond. Wu Sangui, Liu Zhouzhi, and Dai Ming found out the news and joined forces with 7,000 men to attack and intercept. After wanting to win this battle, he returned to attack the Qing army besieging Jinzhou with Ningyuan's soldiers.

7,000 Liaodong troops raided 1,500 Qing troops, but were defeated and returned.

At the same time, the Mongolian Nomqi stationed in the outer city of Jinzhou secretly wrote a letter to surrender to the Manchus.

Zu Dashou learned the news and led his troops from the inner city to the outer city, killing the Manchu generals Mu Husa, Jueluolantai and Hongke. Outnumbered, Zu Dashou retreated to the inner city, while the Qing army occupied the outer city of Jinzhou.

The outer city has been occupied, but Zu Dashou still holds on to the inner city. It seems that he can hold on for at least another half year.

Huang Taiji was flustered instead. He did not dare to consume food like this anymore, so he simply continued to send troops to attack Songshan and Xingshan.

Wu Sangui only had 4,000 soldiers left, half of whom were newly recruited regimental warriors, and they were tightly besieged in Songshan Fort.

…

Hubei side.

Xiangyang rebelled due to lack of pay. The soldiers killed the governor and the general, and all defected to Zhang Xianzhong.

Zhang Xianzhong then sent his troops to surround Yunyang. In the territory north of the Yangtze River in Huguang, only Yunyang Prefecture was left that was not Zhang Xianzhong's territory.

Henan direction.

Yang Guozhu, Wang Pu, Zuo Liangyu, and Meng Ruhu were still encircling and suppressing Li Zicheng. They said they were encircling and suppressing bandits, but more often they were robbing food. The imperial court cannot pay the troops, and they will starve to death if they don't grab food!

Not to mention officers and soldiers and bandits fighting for food, Henan is experiencing another severe drought this year!

The people of Henan really couldn't survive, so Yuan Shizhong, Li Jiyu, Liu Yuchi, Zhu Chengju and others rebelled. He didn't even bother to take a bandit name and directly used his real name to rebel. Zhu Chengju was even a member of the Ming Dynasty clan.

Throughout Henan, there are rebels from all directions.

These rebels all followed Li Zicheng as their leader, but in fact they followed the instructions but not the propaganda. They captured the strongholds of the big landlords, formed strongholds one by one to protect themselves, and occasionally attacked each other.

Unable to suppress the thieves anymore, Zuo Liangyu left Henan again and went to Shandong to rob food and recruit refugees as soldiers.

Li Zicheng called on the bandit leaders from all walks of life to join forces to counterattack. Yang Guozhu and Wang Pu were defeated and fled. They were killed when they broke through the encirclement as fiercely as a tiger.

From then on, Henan became the territory of the rebels. Li Zicheng led his troops back to Shanxi, planning to capture Shanxi and then go straight to Beijing!

The current situation is changing so fast that it is dizzying to see.

There is only one real reason: Zhao Han occupied the south of the Yangtze River, the salt owl was fighting in the Jianghuai River, and the court was unable to collect taxes and pay the army.

…

As far away as Europe.

The British bourgeois revolution officially kicked off this year.

In fact, it has nothing to do with the bourgeoisie. It is just a by-product of the Thirty Years' War.

Britain has been at war for decades, and the royal family has gone bankrupt. So he collected taxes like crazy and drove the nobles, businessmen, and farmers to death. The king also took the initiative to provoke religious conflicts, and the whole country rebelled against him in one outrageous operation!

The Thirty Years' War was still going on in Asia at this time.

The Netherlands realized that its army was not good enough and spent money to hire thousands of Swedish mercenaries this year. Sailed all the way from Europe to attack Portugal's eastern colonies. The main targets were Goa, Ceylon and Malacca.

As soon as the Portuguese fleet transported 500 Indian Marwari horses, the Dutch began to besiege Goa.

If Zhao Han wants to continue buying horses in the future, he will probably have to pay heavy taxes to the Dutch, and Malacca will definitely be taken away by the Netherlands.

April.

500 Indian Marwari horses arrived in Shanghai, all of them are majestic and powerful horses of the best breed!

Unfortunately, more than 30 horses have died during long-distance transportation by sea.

Zhao Han came to Nanjing again, the General Military Mansion was renamed the Dudu Mansion, and the entire team moved to Nanjing.

Everyone knows what Zhao Han is going to do next.

Northern Expedition!

Northern Expedition!