Gu Yong wanted to surrender to Sun Quan, but the people of the Gu family had different opinions, and after Gu Yong wrote a letter to discuss with his father for a long time, Gu's father agreed to let his second son Gu Hui explore the way for the Gu family.

Of course, Gu Yi was also chosen by Gu's father, Gu Yi's relationship with Gu's father has always been good, Gu Yi and Gu Hui are close in age, and they often read and talk together.

The rest of the Gu family was reluctant to take sides when the situation was still unclear, but they did not explicitly oppose it.

Most families will let their children choose different paths, although it will reduce the profit, but also reduce the risk.

The Gu family took the lead in surrendering to Sun Quan, although they took the lead, in fact, to a certain extent, they could be regarded as backstabbing the Lu family.

After all, the four major families should have been in the same spirit, but Gu Yong chose to stand on Sun Quan's side when he knew that the Sun family and the Lu family had an old enmity, which would inevitably cause the Lu family's dissatisfaction.

So since Gu Yong wants to follow the path of the Sun family, he has no way back.

——

The rainy season in spring has finally passed, and when it is rare to have a sunny day, Qiao Wei met the blacksmith recommended by Mo Sangongzi.

said that he was an old craftsman, but in fact he was only in his early forties, named Rongsheng, and his movements were shrunk, and his speech was a little stammering.

When Qiao Wei asked him to sit down, he didn't dare, and only said that he was standing in fear.

The other young man who accompanied him was much bolder, and helped Rong Sheng to sit down, "Since the noble man has given him a seat, Father should not refuse." ”

"Rong Gongzi said very much, the old craftsman should not shirk, and I am not used to raising my head to talk to people. Mo San Gongzi is also here, you should talk to your friends, and you don't have to mind that I am a woman. ”

Rong Sheng naturally didn't dare, and stammered again, looked at Mo Sangongzi, looked at him and nodded to himself, and then sat down cautiously.

Mo Sangongzi didn't talk nonsense, and directly asked Rong Sheng to take out his drawings and show them in front of Qiao Wei.

"This ...... This is...... Changed, changed...... drainage, drainage, water ....... ”

Rong Sheng was already nervous, but when he raised his eyes and saw Qiao Wei's eyes, he couldn't help but be more nervous, and his speech was even more stammering, and he couldn't say why for a long time.

Mo Sangongzi couldn't help but secretly support his forehead. This guy is already prone to stammering, but if he talks to someone he knows, he can speak more slowly, but it will be fine.

But once you face the living, this speech is really anxious.

Rong Sheng saw Mo Sangongzi's helpless expression, and he was annoyed, and he didn't know what to say.

Qiao Wei pointed to the drawings and asked calmly, "Is this a water drain?" ”

In fact, it is what later generations called a blower. In the process of iron smelting, the burning of fire requires a large amount of air to reach temperatures of thousands of degrees.

At present, the iron-smelting assistant still uses a horse row, that is, uses horsepower and manpower to pull the large bellows fan blades to achieve the purpose of transporting air into the iron furnace.

Compared with the blower that plays a role with electricity in later generations, such a horse row is naturally too inefficient, and because the air entering the furnace is not enough, it often causes the combustion materials to not be fully burned, the temperature in the furnace is not high enough, and a large amount of dust is generated, so that the purity of the iron smelted is not high enough, and the content of impurities will be very high.

Therefore, if you want to train soft iron or wrought iron, you need to spend a lot of manpower to temper it again.

Qiao Wei carefully looked at the water row on the drawing, using the principle of a horizontal water wheel driving a wooden fan to blow air. Using the natural power of flowing water, the fan blades are rotated.

Rong Sheng saw that Qiao Wei understood, and his eyes couldn't help but light up, "Yes, yes, yes!" Only...... That is, it's ...... Water, water drainage. ”

Rong Sheng's son Rong Shuo saw that his father was still not clear, so he hurriedly took over, "If you go back to your nobles, this is indeed a water drain." This water drain needs to bury the bottom part of the water into the water, when the flowing water passes through the row of leaves, it will drive the whole wheel to rotate, and then through these two wattle gears, drive the other half of the sealing leaves to rotate.

The villain and his father tried many times, and this drain did speed up the wind in the bellows, so that the furnace could burn more vigorously, and the iron smelted would be easier to forge into soft iron. ”

Rong Sheng nodded again and again, indicating that what his son said was what he wanted to say. But he looked at Qiao Wei again, his eyes full of hesitation and worry.

Qiao Wei nodded, dispelling Rong Sheng's worries, "I understand." ”

Use the potential energy and kinetic energy of water to convert it into kinetic energy! It's not hard to understand.

However, if you want to be able to use the drainage, you need to use hydraulic power, which is bound to use water. This can be regarded as the right place, the water resources in the north are not as rich as those in the south, and the land in Jiangdong is even more abundant.

No matter how bad it is, there is the Yangtze River to rely on, which is a steady stream of water energy.

In addition, Rongsheng also gave a method of forging 100 steel, burning pig iron to make a lot of soft collars, and a few nights to become steel, using soft iron as the spine of the knife, bathing with the drowning of five animals, urging the fat of five animals, and cutting the armor more than 30 times.

To put it simply, it is to melt the pig iron, pour it onto the wrought iron, increase the carbon content of the wrought iron, and then quench it into steel with the urine and fat of the livestock respectively, the essence is also because the urine of the livestock contains salt, which is used as the cooling medium for quenching, and the cooling rate will be faster than that of water, so the quenched steel will be harder than the water cooled. Quenching with livestock fat, on the other hand, cools more slowly than water, so that the quenched steel will be tougher.

I have to say that although people in this era can't say the principle, their experience and technical wisdom should not be underestimated.

Qiao Wei didn't expect the so-called steel filling method to be like this.

Mo Sangongzi took out a sword, and the body of the scabbard was carved from ebony wood, which looked very simple and inconspicuous.

In the next moment, the sword came out of the scabbard, and the sword body was as smooth as a rainbow, emitting a shining cold light, which made people dare not look at it.

Just at this glance, Qiao Wei sighed with emotion, "Good sword." ”

"The hundred steels used in this sword are made by this method." Mo Sangongzi bowed and saluted, walked out of the courtyard, and asked the little servant next to him to take a fifty-tempered sword and stand aside.

Mo Sangongzi's hand rose and fell, and the fifty-refining sword was cut off.

Qiao Wei's pupils couldn't help but dilate a little, the so-called sharpening of iron like mud is not an exaggeration at all.

This scene is a little too shocking.

Then Mo Sangongzi took another spear with eighty refinements, and another knife, and the blade of the spear with eighty refinements was cut out of a deep gap.

According to Qiao Wei's knowledge, it is more common for most of the warlords to use weapons with fifty refinements, and eighty refinements are not many.

But if Jiangdong's army could be equipped with such a hundred refined weapons, she really couldn't imagine how cool it would be to be in such a crushing situation on the battlefield.