Square head, flat bottom, stiff sail. This is Datang's most advanced sailing technology, and the craftsmen who will be the supervisors were full of pride when they introduced this to Qin Ze.

For these craftsmen, the punt was enough to cope with the inland rivers and lakes. But for rough seas, the punt loses almost all its advantages.

If the bottom of the boat can be made spindle-shaped, not only will the water resistance be reduced, but the draft will also be increased, so that more supplies can be carried.

Because its center of gravity is lower, the sharp boat also has some good resistance to wind and waves when encountering wind and waves.

It's just that when Qin Ze told the craftsmen who would be the prisoners of this idea at the beginning, he got a resolute denial.

They are also correct in their denial, that is, not only is it much more difficult to make, but not only how difficult it is to transport it from land to water, but it is impossible for this shape to stand up in the water.

It is almost impossible to make a perfect spindle curve out of wood. Qin Ze had never considered using wood, this thing might still have some toughness in an inland lake with little wind and waves. But if you go to sea, it will be a terrible thing.

Especially when Qin Ze still wanted Mo Xuan to use this to go to the North Pole and South America, he definitely couldn't use a wooden boat.

So in this way, Qin Ze still admires these envoys sent to the Tang Dynasty by the Wa State. Although the sea area they span is not very large, the number of people they have lost is far from what ordinary people can imagine.

Since wood is not good, Qin Ze has to use steel to make it.

Since the Turks were defeated, a steady stream of iron ore has begun to be sent to Chang'an. So in this way, Datang's steel output has also doubled. Not to mention anything else, in Qin Ze, the Tang Academy, there is also a large amount of steel.

Only things lighter than water can float above the water, this is a truth that these craftsmen believe in.

But when Qin Ze set up an iron model sailboat in the water, these craftsmen immediately froze in place.

"Impossible." Qi Zuojian, as the leader of these craftsmen, was naturally the first to raise objections.

Qin Ze shrugged, grabbed a clay pot from the side and threw it into the water.

This is a clay pot specially made by Qin Ze, and after being put into the water, it naturally stands firmly on the surface of the water.

At this time, Qi Zuojian couldn't speak anymore, but just stepped forward with a group of craftsmen and began to look left and right around the two things.

"The reason why things can float on the surface of the water is not because they are lighter than water, but because of the size of the part that is trapped in the water."

Archimedes' law of buoyancy, Qin Ze has no way to tell them. If you want to understand this, you have to start with what volume and density are, and it is not something that Qin Ze can figure out in a word.

"In the past, Pangu opened the world, the clear rose for the sky, and the turbid fell for the earth, but I never thought that such a strange thing would happen now." Qi Zuojian still looked puzzled, and looked at Qin Ze more as if he was looking at a strange person.

Hearing his words, Qin Ze also smiled helplessly. This is Qin Ze's biggest helplessness, that is, when these people are faced with things that violate common sense, their first reaction is to wonder if it is Qin Zeshi's immortal law.

I'm afraid that if I tell them directly now that the reason why these things are floating on the surface is because I have cast immortal methods, it will be faster than reasoning with them.

"It's better to find me a few more students, I'm too lazy to waste a conversation with you hard stones." Qin Ze waved his hand and said angrily.

These craftsmen are too old, their comprehension skills have already deteriorated, and they have a fixed mindset, so instead of training them, it is better to find some young ones.

In fact, Li Chengqian is a good seedling, and he is the best choice in terms of understanding and talent. However, Qin Ze didn't have the courage to teach Li Chengqian this, after all, if Li Er knew that his future successor was fooled by Qin Ze to do the things of these craftsmen, it was estimated that he would not hesitate to exile Qin Ze far away.

What Li Er wanted Qin Ze to do was to make up for what Li Chengqian lacked. And for more than half a month, Li Chengqian has been gathering at Datang Academy every day, and finally vented his exuberant energy.

For more than half a month, he slept as long as he wanted, and ate whenever he wanted, even if he took off his shirt and went into the water to catch shrimp, no one would say anything about him.

Qin Ze just wanted to guide Li Chengqian to vent the depression in his heart, and now it seems that the effect is not bad.

Li Er can clearly feel that Li Chengqian now has a different temperament. In the past, although Li Chengqian was polite and behaved decently, he always seemed to lack the agility he should have.

Looking at Li Chengqian now, Li Er can feel the changes in him, and he finally has a trace of his own expression on his face. This change made Li Er suddenly feel a sense of relief.

When he heard that Li Chengqian was wearing a Hu costume and performing a Hu salute in the East Palace, Li Er also felt extremely angry. It was this incident that made Li Er begin to reflect on his education of Li Chengqian for the first time, so this time he agreed to Li Chengqian and summoned Jieli to let Li Chengqian see what a real khan looks like.

This was a somewhat excessive request, but Li Shimin agreed.

In the Ganlu Palace, Li Er sat on the top seat, and there were many ministers below. People like Cheng Laoyou, Wei Chigong naturally exist, and even Fang Xuanling and others are sitting aside.

After Jieli was captured and returned to Chang'an, although Li Er spared his life, he liked to call him to the Ganlu Hall at every turn, and then came to dance in front of the ministers to cheer them up. This seems to have become a way for Li Er and the ministers to have fun.

Today is naturally no exception, Li Er took his ministers to drink and talk. In the middle of the main hall, there are also more than a dozen singers playing and singing at this time.

"I listened to what Jieli said, and I learned a new kind of dance. Since all the ministers are interested, it is better to call him to come and dance for us. ”

The entire Tang Dynasty can be said to hate Jieli to the core. Although they said that they had spared his life now, Li Er and the others just changed their way to humiliate Jieli. But Jieli is still very acquainted, and I heard that he will work hard to learn singing and dancing every day, just to help Li Er.

The ministers naturally had no objections, but when Li Erxuan saw Jieli. Outside the hall, another sentence suddenly came: "The Emperor Taishang has arrived." ”

As soon as these words came out, Li Er, who was originally in high spirits, suddenly collapsed, and his relationship with his father Li Yuan had always been a little unhappy. In addition, Li Yuan insisted on moving out of Taiji Palace last year, which made the relationship between the two even worse.

So now that he suddenly heard that it was Li Yuan's arrival, it also made Li Er stunned.

It's just that what Li Er didn't expect was that it was not only Li Yuan who came over this time, but even the crown prince Li Chengqian was also by Li Yuan's side.

Don't talk about Li Er in this scene, even the ministers on one side can't help but be a little surprised. Especially everyone knows that Li Er has always been at odds with Li Yuan, and now he is like this......

Li Yuan stepped forward to personally help Li Er, and then patted him on the shoulder, and said with pride in his tone: "In the past, when the Tang Dynasty raised troops, the national strength was weak, and a certain had to pay tribute to the Turks in order to seek a long time. This is a lifelong shame and a national shame of the Tang Dynasty.

Now Wu'er Xing's army has broken through the Turks, and even Najieli has been captured. A certain shame and the national shame of the Tang Dynasty are all retribution. I have entrusted it to win souls, so why worry about it"!

Li Yuan's words were extremely forceful, and even Li Er, who was standing in front of him, was stunned for a while.

Li Er has always had a deep sense of crisis, because his throne was not glorious. But now Li Yuan said: "I entrust it to win people, why worry about it!" ”

Didn't he tell the world that Li Yuan was willing to abdicate. And this is not the highest reward for Li Er.

Li Er never imagined that the thing he had been looking forward to fearing would become a reality on this day.

"Father's ......"

Li Er only screamed, and then the two hugged each other......

Jieli didn't expect that the dance he danced would make Li Er and Li Yuan so happy.

In the end, Li Yuan even played the pipa himself, and Li Er danced with him. This appearance of father's kindness and filial piety also made the ministers sigh.

In all fairness, Jieli is extremely ugly, he was originally five big and three thick, and he naturally can't talk about a trace of beauty when twisted like this.

But now everyone thinks that his dance is so beautiful, not because of his movements, but because he can make the knot between Li Er and Li Yuan dissolve like this.

Then the entire hall completely changed, and since Li Er had gone up to dance, these ministers would naturally not be idle.

They all came up one after another, and they all showed their teeth and claws together......

When Cheng Huailiang told Qin Ze about this, Qin Ze only pouted, without a superfluous expression.

It was naturally Qin Ze's idea to let Li Chengqian invite Li Yuan, he knew what Li Er cared about most in his heart, and he also knew what Li Yuan cared about in his heart.

Qin Ze had already discovered very early on that the reason why Li Yuan chose to move out of the Taiji Palace was that it was just one aspect of being angry with Li Er. What's more important is that Li Yuan feels the pressure from Li Er, so he is also looking for an opportunity to reconcile.

Since both of them need steps, Qin Ze naturally wants to give them, and then let Li Chengqian reduce a benefit, why not?

Cheng Huailiang didn't see the expression of expectation on Qin Ze's face, and frowned at the moment: "Could it be that you already knew about this matter?" ”

Qin Ze shrugged, patted Cheng Huailiang's shoulder, and said, "Should I cooperate with you?" Otherwise, I'll be as surprised as I am. ”