It is precisely because of the incomplete innovation that although the good and the poor did not marry in the Song Dynasty, although it was not immutable, it was basically inherited. Not only did the "Song Criminal Rule" promulgated in the early Song Dynasty copy all the provisions of the "Tang Law and Discussion" on the good and the lowly not marrying, but the law remained the same until the late Southern Song Dynasty. In other words, that is, what level of family can only intermarry with families of the same rank, as for the non-marriage of the shishu, although it is generally broken, it is only a generality. Marriages within the family were still arranged by the elders, which was consistent throughout the feudal era of China, and the Song Dynasty never changed much.

Therefore, Zhao Yu still doesn't have much hope for his marriage, but he still hopes that he can reconcile. In his opinion, although marriage cannot be decided by itself, but exists as a political tool, then he needs to use it to the extreme. He knew that in order to prevent foreign relatives from interfering in politics, the basic principle of the Song Dynasty was to "raise them with Fenglu Gaojue, and not let them recruit power and do things without permission".

That is to say, although the imperial court will grant false titles such as the envoy of the foreign relatives, it will not give them real power, among the large number of foreign relatives, there are only a handful of officials to the ministers of power, so in the entire history of the Song Dynasty, there were not only no foreign relatives and foreign dynasties, and it was difficult for foreign relatives to have much influence on the government and politics. In such a social environment, many relatives have developed the habit of being indifferent to power, so they are all praised as "getting relatives".

Zhao Yu wanted to use the principle of "foreign families do not hold important positions and do not interfere in political affairs" to get rid of those important ministers in the DPRK who wanted to change but could not be replaced, and who wanted to withdraw but could not be withdrawn, but they did not leave. He could use a marriage to send them home to retire, and then gradually promote his cronies to the top of the ranks, so as to complete the transfer of power and the peaceful transition between the old and new ministers without bloodshed. But in the current situation, it is very difficult to do, because there is no initiative in this matter.

Since there was nothing to change, Zhao Yu put the matter aside for the time being. However, the Empress Dowager imprisoned Yao Liangchen and Wei Tianzhong, which made him feel strange, was she trying to hold power and authority, or was she removing disasters for herself? But after thinking about it, it is not very similar, according to the laws of history, in addition to the crown ceremony before the young emperor came into power, it was a big wedding, indicating that he was an adult and could handle government affairs and take care of state affairs.

On the other hand, Zhao Yu considered that the old Zhao family had withered after a great change, and there were only a few left in the scattered clan. And the descendants of Emperor Ningzong are only left with himself and Emperor Deyou Zhao Xian, who is far away in Dadu, as far away as he knows, he later married a Mongolian princess as his wife, and then became a monk in order to avoid trouble. The task of spreading the branches and leaves will be handed over to himself, even if he dies, he can leave a man and a woman behind, so that he can have roots, and he can inherit the unification, so that he will not fall into the next family.

But thinking of this, Zhao Yu was also relieved. At present, the Great Song Dynasty has left itself with a positive root, even if the Queen Mother wants to listen to the government in the court, and she has passed the addiction of being Wu Zetian, sooner or later the throne will have to be passed to herself. If he has an outside heart, then someone will write to the Queen Mother to let him be in charge of the government and send him back to the harem. But in his opinion, the Queen Mother is not a person who is greedy for power, and things will not come to that point, but he can't guess the hidden secrets, and he doesn't want to guess......

Although Zhao Yu made up his mind not to think about the affairs of the court and the central government, and had a good time to relax for a few days, he walked around this big lonely mountain in two days, and he didn't have any literary and artistic cells, and he would not see the scenery lyrically, and he would not write poetry. In addition to practicing martial arts with the soldiers of the guard battalion every day, it is to find a place near the lake to catch fish and shrimp, but if you want to go down to the island to go to other places, you must not think about it.

Now hanging behind Zhao Yu are not only the guards of the guard battalion, but also the guards of the personal guard regiment. In the name of strengthening vigilance, Yang Shilong also gathered all the boats on the island to take care of them, and ordered a regiment of soldiers to strengthen patrols day and night to prevent people from smuggling onto the island. Of course, he knew that these were measures against himself, but he didn't bother to deal with them. And Chen Dun was so angry that he wanted to mobilize the guard battalion to wipe out a group, which was obviously to look at them as thieves!

"The waterwheel is very delicately designed!" The Huang Ting Hall of Yanxiang Garden is a multi-storey building, which can overlook the entire West Lake area, is the most important main building of the whole garden, the landscape is the best, and the hall is also painted with the landscape painting of Xiao Zhao, a famous painter of this dynasty. Zhao Yu climbed the tower to view the scenery today, but did not see that the scenery of the West Lake is any good, in his eyes the natural landscape without artificial decoration is the most magnificent, the telescope can't help but turn to the farther field, at this time the summer grain is about to be harvested, the farmers are using a water wheel to drain away the excess people in the paddy field, he looked at it and said with a smile.

"The official family is not called a waterwheel, but a water mill, which is very common in the south of the Yangtze River near the riverside, and it is said that it was invented by the ancestor Chongzhi of the Southern Dynasty, and even the emperor at that time came to see it in person. This thing can be used in three ways, with the head of the wheel of rushing water, one section of the grinding into the surface, the second section of the mill into rice, the third section of the water diversion irrigation in the rice field, the people at the water's edge have the family of the water mill, but the rice husk can not be used to go to the husk of the rice husk for a lifetime. Wang De explained with a smile.

"Oh, so this thing is the water mill!" Zhao Yu touched his chin and said. He remembered a debate on the Internet in his previous life, that is, whether Zu Chongzhi's invention of the water mill was related to the 'Thousand Miles Boat'.

"Yes, the official family is very clever, we can take a look at it in the future!" Wang De has followed the little emperor for so many years, so he naturally knows what he likes, and said with a smile.

"Wang De, you go back to the palace and ask the craftsmen of the craftsman's workshop to make a model of the water mill, and move the objects in the studio here." Zhao Yu had his own thoughts, thought of a goal that could pass the time, and turned his head to Wang De and said.

"Official, the Queen Mother has a decree, and she is not allowed to return to the palace without an edict, and besides, Commander Yang is very strictly guarded, and it is not easy to get out!" Wang De said with a sad face.

"Stupid, then you let him pass the message, I will ask for these things tomorrow, let him watch it!" Zhao Yu scolded, then turned around and left.

The next morning, as Zhao Yu said, Yang Shilong personally sent the things he asked for to the dormitory, and made amends. said that the Queen Mother had scolded him fiercely yesterday, reprimanded him for not understanding his own mind, and asked him to take care of the little emperor, but how dare he be unreasonable to His Majesty. At the same time, he said that as long as His Majesty does not go down to the island to ask for anything, he will never dare to disobey anyone he wants to meet despite his orders.

Zhao Yu naturally didn't care about it because of this, his mind was no longer here. Now everyone knows that the reason why the chariot ship must be faster than the ordinary wooden oared warship. The first is from the perspective of human muscle strength. There is a saying that "the arm can't twist the thigh", and from the difference in leg and arm strength, it can be seen that the car and boat must be faster than the oar. The second is from the perspective of physical work efficiency, the paddle blades of the vehicle and ship are in continuous motion and have high efficiency, while the wooden paddle is intermittent in paddling and has low efficiency.

Therefore, theoretically speaking, the speed of paddle wheelers is basically twice that of paddle boats when the same number of sailors of the same physique drive ships of the same tonnage with oars and paddle wheels and sail in the same waters. Of course, the situation in practice will change depending on other factors, but it is certain that the top speed of a vehicle and boat should be higher than that of the fastest paddle boat.

Vehicles and ships appeared very early in Chinese history, at least during the Northern and Southern Dynasties. It was during this period that suddenly a kind of Mengchong warship called the 'Thousand Miles Ship' appeared, and the controversy began. Of course, Zhao Yu knew that the power sources of ancient ships were only sails and manpower, and the power propulsion tools were oars, oars, waterwheels, paddle wheels, etc. However, as inferred from the name "Thousand Miles Ship", it is likely that this high-speed ship has applied a new power source or a new way of power propulsion.

Because there are no physical objects and pictures of the thousand-mile ship, it can be known that it is an inland river warship according to historical records. Based on this, Zhao Yu and the others judged that because inland river and offshore warships need high maneuverability and cannot be affected by too much wind direction and current, sails are not the primary power source for warships. However, from the perspective of physics, there is not much room for improvement in the work efficiency of holding oars and oars. Therefore, based on the historical conditions at that time, they judged that the possible improvement was to add an efficient prime mover or a paddle wheel propulsion device that was better than the waterwheels of the current warships.

For the sudden appearance of this new type of high-speed warship, due to the lack of historical materials, people do not know who invented it, so there are many speculations, thinking that it was invented by Zu Chongzhi. But later generations knew that he was a mathematician and calculated pi, thinking that this was something that could not be beaten with eight poles. It led to quite a bit of controversy.

Zhao Yu 'studied' and thought it was really possible, Zu Chongzhi lived in the Liu Song and Southern Qi dynasties. His grandfather, Zu Chang, was the master of Liu Song and was in charge of civil engineering; Zu Chongzhi's father was also an official in the court. With such a family environment, coupled with his acquired efforts, it is possible that he has made outstanding achievements in the fields of mathematics, astronomical calendar, and mechanical manufacturing, and it has successfully copied the guide car and this water mill, which can also be inferred that Zu Chongzhi has a very profound study of vehicles and gear structures.

However, Zhao Hao's views were severely criticized, thinking that this is a matter of cattle and horses, and opponents believe that the development and innovation of technology are not made overnight, all have historical inheritance, and after the Southern Dynasties, the shipbuilding industry was extremely developed in the Tang, Song and Ming dynasties, and the so-called vehicles and ships that traveled thousands of miles a day did not appear, and the Song Dynasty, which was the most widely used in vehicles and ships, did not reach this height, so how could it appear during the Northern and Southern Dynasties?

Zhao Yu was speechless at that time, but some people put forward new views, thinking that without labor and feng shui, it could only be animal power. The use of animal power as the power of the ship generally occurs when the fiber is pulled, and in addition, there is only one situation left - there has been a cow-to-cart ship in the West. The evidence is that in the sixth century A.D., in the world's first painting of a bull-drawn patron steamer, an ox was used to push a winch on a Roman warship, and then the winch gears were used to drive three pairs of paddle wheels on the side of the ship.

However, it was soon said that the painting was a forgery of later generations, not by a painter of the sixth century. Because there was no literature of vehicles and ships in the West before this figure, and for a long time thereafter, until the time of Leonardo da Vinci, the vehicles and ships he envisioned were only drawings and plans rather than physical objects, and there was no record of the use of vehicles and ships in the West, which makes this map extremely abrupt. Moreover, the car and ship in the picture are still using primitive side rudders, not stern rudders, but the power system is the top paddle wheel propulsion device in ancient society, which cannot but make people doubt its authenticity.

The water mill has long been lost, it is only a thing that is not known in detail, Zhao Yu's side can't come up with anything favorable to prove it, so it can only be 'willing to bow down', but the water mill reminds of the past, anyway, idle is idle, if you can prove that your original argument is correct, it is worth it, although those netizens have no chance to know, then let them go in a daze! And now that I have thought it through, it is of practical significance to be able to restore this kind of high-speed vehicle and ship, so why not do it!

Before the advent of water milling, grinding and milling were separated, and the mill was rotated by manpower or animal power for a long time. Zu Chongzhi's invention is to use the "water rotation" wheel axle to promote the "grinding rotation", so the first person like Zu Chongzhi to calculate the value of pi to the seventh decimal place, created the "Ming Calendar", invented the timer, especially the great scientist who copied the guide car of the copper machine transmission, is very likely to implant the animal power mill into the ship's power system, and it is possible to reverse the thrust when building a ship, and use the "grinding equipment" to promote the "water rotation" to realize the conversion of energy.

At the same time, the machinery invented by Zu Chongzhi was either improved on the basis of his predecessors, or created based on the mechanical names of his predecessors, so it is also very likely that the Qianli Ship was a new type of fast car ship based on the improvement of the Mengchong warship in the late Eastern Jin Dynasty. Perhaps the Thousand Miles Boat gets its name from the fact that the ship is driven by a thousand miles of horses, because we rarely say that a ship travels thousands of miles a day. In addition to this thousand-mile ship, only the Song Dynasty's car ship Flying Tiger Warship has the metaphor of traveling thousands of miles a day, but Zhao Yu has already seen it, he thinks it is impossible, and he has not found that there is an animal-powered ship.

Zhao Yu felt that the idea of replacing manpower with animal power was not unrealizable, and it was of great practical value, and the Yangtze River defense line was long, even if he deployed a large number of troops on this line, but it was still far away. If there is a big war, it is necessary to increase the troops in time, and the fastest and most effective way is to take the waterway, and it is better to go downstream, so as to maintain a relatively fast speed. However, if you have to go upstream, if there is a headwind, or the speed of the river is fast, the speed of the boat will decrease.

In addition, it is not only difficult for sailors to rely on manpower to drive warships, but also to delay military aircraft. If it is possible to replace manpower with animal power to drive warships, then it can not only liberate manpower, but also speed up the speed of the boat, so as to achieve rapid maneuver and turn a thousand miles of aid in one day into reality, which has immeasurable strategic significance......