Since ancient times, it is difficult to be a prince because poor performance will disappoint the emperor and make the brothers feel that there is an opportunity to take advantage of it and will be deposed sooner or later. If the performance is too good, the emperor cannot sleep. He is always afraid that the prince will take office in advance, so he feels unhappy no matter how he looks at the prince, so the prince is deposed.

Since the Wei and Jin Dynasties, it has been difficult for the prince to be a generation of Li Tang, because if the prince is weak and has no foundation, he will likely be done after he succeeds to the throne. If the prince is too strong, it will lead to abnormal death of the emperor.

Therefore, Yuwen Wen faced a serious problem: supporting the prince, threatening the imperial power, and not supporting the prince. In the future, the prince became the emperor, and the imperial power was still unstable and faced a huge threat.

How the emperor can grasp this size well is a big problem.

Judging from the current time point alone, the Crown Prince Yang Yong of the Sui Dynasty was deposed before, and the Renshou Palace later became suspicious (it is said that Emperor Wen of Sui died strangely, and Prince Yang Guang took office in advance).

"Later" there was a change in the Xuanwu Gate of the Tang Dynasty. Li Yuan played a balance between his two sons and was forced to abdicate himself.

How the emperor supports and trains the prince is really a big problem. This is a difficult and complicated problem that arises under the premise of aristocratic politics and aristocratic politics. Starting from the Zhao Song Dynasty, this problem was alleviated because of the emergence of the bureaucratic group of imperial examinations.

In the Ming Dynasty, the prince was justified in his succession. Even when the prince was still in the Eastern Palace, he was a cowardly deprived and steadily sat on the throne when the old emperor passed away, but it was not possible in this era because the political environment was completely different.

This political environment has had an empress, so if Yuwen Wen wants to make the throne smoothly, he cannot apply the "formula" from the Song and Ming dynasties.

Simply put, he only needs two: First, his emperor's career can end normally, that is, he will die naturally, instead of having a certain palace change like Emperor Wen of Sui, and he does not want to be forced to give up his throne like Emperor Gaozu of Tang, and spend the rest of his life under house arrest.

Second, after his "collapse", the prince who succeeded to the throne could firmly sit on the imperial throne, and the imperial power was still solid.

These two requirements do not seem contradictory, but considering that the age difference between him and the prince is very small (relatively), that would be bad.

Yuwen Wen got married very early and gave birth to a son very early, which led to the prince becoming an adult when he was still young and strong.

If Yuwen Wen himself was sick and could not afford to sit on his bed every few days, it seemed that he would have a few years of life, then the prince had hope. After all, he would be able to ascend the throne and become emperor after a few more years.

However, Yuwen Wen is now in good health, and he eats everything he wants and is extremely energetic. He looks like he can still be in power for decades and is a "old man". To some extent, this will make the prince feel "desperate".

It is difficult to be a prince, and there are brothers who are eyeing him, and they will be deposed if they are not careful. Or their father may leave. In such a depressed mental state, the prince will feel sick after a long time.

When a person has a heart disease, his behavior will become weird and he will complain more and more.

"How could there be a crown prince for forty years in ancient times?" Yuwen Wen knew that this sentence was complained by Yinreng, the crown prince of Emperor Kangxi of the Qing Dynasty. This crown prince, who was nearly forty years old, had no chance of being deposed and enthroned twice.

Facing the prince who was hopeless in succeeding to the throne by Emperor Changshou, complaining lightly, but more often than not, he took the wrong steps.

Either do witchcraft and curse the old emperor to die early; or do it directly and make the old emperor die early.

As the crown prince, the crown prince was the first beneficiary after the emperor's death, and the biological mother and queen were the insider of the palace. He had the motivation and ability to let his father "get off work early". In this way, the father who was very happy to be the emperor must have a heartache.

The consequence of father and son suspicion and husband and wife suspicion is that human tragedy occurs. Whether it is the father killing the son, the son killing the father, or the wife killing the husband or husband killing the wife, it is not the result that Yuwen Wen wants to see.

Because of his mother's family, Yuwen Weicheng naturally aroused a lot of opposition forces, so he had to make contributions and establish authority in order to calm all kinds of criticism and slander.

Yuwen Wen wanted to appoint his sons to guard all directions and consolidate the imperial power. As the crown prince, Yuwen Weicheng could not have worse military merits and prestige than his brothers, so he also needed to make contributions and establish authority.

Therefore, over the years, Yuwen Wen has created many opportunities to give the prince military merits and prestige, and the prince has also achieved excellent military merits and prestige as he wishes.

Then, when Prince Yuwen Weicheng gained enough reputation, military merits, became familiar with government affairs, and showed his ability to govern to a certain extent (after Yuwen Wen went on a patrol several times), it was time to "refrigerate".

Yuwen Wen would no longer let the prince supervise the country, so he would avoid the prince and the magistrate and the imperial guards being too close, so he brought the prince with him when he went on a patrol and let Yang Ji, Wang Jun, Xu Shao and other confidants stay in Chang'an.

Yuwen Wen will no longer let the prince lead the army to fight, avoiding the prince's relationship with the generals of the army and establishing relationships, nor will he form a small ruling team for the prince, and the officials of the Eastern Palace will be replaced regularly.

Of course, the prince can still have basic confidants, and he can't be alone.

Yuwen Wen did this to prevent the princeling from taking shape prematurely.

This is the principle of imperial power: there is no two days.

If the emperor supports the prince, there will inevitably be officials around the prince and form a "princeling party". Based on the fact that the prince is the future emperor, more and more officials will get close to the prince. After all, no one wants to succeed the new king in the future and settle the score with him.

In this way, it will inevitably lead to a court with two power centers, that is, the situation where "there are two days in the sky". Such a situation will inevitably lead to intensification of contradictions and the slaughter of father and son.

However, if you do not support the prince, the prince will inevitably be unable to hold the throne in the future, and even the position of the prince will not be able to be kept. Therefore, the dog is desperate and the father and son will still be killed.

Therefore, Yuwen Wen’s “refrigerated” of the prince is not really a waste of time, so as not to send wrong signals to the outside world, making people think that he wants to depose the prince.

Instead, we will change the method to train our son: lead the dispatch and serve as a mission.

For example, supervising the transfer of materials from Shandong to Guanzhong, supervising a certain place for academic and political education, supervising shipping, etc.

The prince took the dispatch and did not need to leave Beijing, but appointed an assistant to do business in other places and took charge of the overall situation and made decisions.

This is also to train the prince's ruling ability (employment ability) and make the prince familiar with the operation of the entire bureaucratic system.

Sooner or later, the prince will have his own set of troops, so he can take advantage of the opportunity to lead the dispatch to be familiar with the abilities of officials of various departments. If necessary in the future, he can select talents in a targeted manner without any disdain.

If the dispatch is done, the prince, as the chief official, will certainly have the credit and gain reputation. If the task is broken, the blame will be taken by the assistant. At worst, the prince will write a review and say that "the person is unknown."

As the crown prince, the prince should not leave the power center of the capital easily and stay in Chang'an. He could meet Yuwen Wen every day. He would say anything between the father and son in person, whether it was teaching, scolding, or explaining doubts.

It is better for a father and son to talk directly than if someone passes the message on his behalf.

What Yuwen Wen is wary of is that once the person who sends the message has ulterior motives, he secretly provokes the relationship between father and son, and gradually lays the hidden danger of father and son fighting each other.

Therefore, Yuwen Wen "refrigerated" the prince. At present, the effect is good. The prince is still receiving effective training, but there is no possibility of secretly cultivating party members on a large scale and making friends with generals in the army (especially the generals of the imperial guards).

The prince went to the Political Affairs Hall from time to time to listen or to the court. The princess Wei began to participate in the group activities of the Huangzhou Group (a foreign wife) and assisted the queen in industrial management. They all proved that the prince's status remained unchanged, saving several brothers from fighting for the throne.

Now, the prince has also taken a mission to take the lead in technical research and strive to make the propeller thruster practical as soon as possible. If this technical difficulty is really broken, shipping development will enter a new level, which is a great thing that benefits the country and the people.

Of course, the prince did not know technology when he received this assignment, but Yuwen Weicheng was really working hard. Now when talking about technical issues, he was very knowledgeable. Yuwen Wen was happy to see his son talking.

Yuwen Wen was really happy because the prince actually told him how the propeller thrust calculation formula was derived.

The propeller rotates in water and then generates thrust. So how to calculate the thrust is crucial. It belongs to the scope of fluid mechanics and does not belong to this era.

Yuwen Wen himself didn't know what the calculation formula was, so he could not provide any substantial help in the derivation of this formula.

However, since the day the steamship began to be developed, contemporary mathematicians and many scholars have begun this difficult exploration, accompanied by the steamship, through countless years.

Among these people are craftsmen represented by contemporary engineering master Yu Wen Kai, scholars represented by contemporary mathematics master Liu Xuan and Liu Zhuo, and new technicians who grew up in Huangzhou.

The collective wisdom of countless people surpassed the "abnormal" Yuwen Wen, initially deduced the formula that did not belong to this era, and obtained arguments through a large number of experiments.

The formula needs to be further revised, but with theoretical guidance, the development of propeller thrusters will be twice the result with half the effort.

To drag a ship of a certain size to sail at a certain speed, the diameter of the propeller must be, the number of blades, shape, and the speed of the propeller can all be calculated according to the formula.

The designers have clear theoretical guidance, so they don’t need to be confused and save a lot of time and energy.

"Father, the standard propeller style has been roughly determined now. On this basis, the propeller speed has also been clearly targeted... This requires the support of the variable speed gear set..."

"The gear set speed increase ratio, when the normal speed of the propulsion is about four to five, the gears cannot stand it. If it is too fast, the speed increase effect is not good. This is the result obtained after many tests..."

"The transmission equipped with a propeller thruster has entered the third phase of operation test, which is divided into forward gear and reverse gear. The forward gear is divided into three gears, namely low speed, medium speed, and full speed..."

"The structure and technology of this transmission come from Daye Military Control Commission. Since the lathe and boring machines in their place have been powered by steam engines, they need to switch speeds frequently. Therefore, they have many transmission and gear technologies to refer to..."

"Of course, after the propeller thruster is practical, the patent fee is to be paid..."

Seeing what his son said was so "professional", Yuwen Wen was really happy: his career, the technical forces that promoted social development, finally had a reliable heir.
Chapter completed!