"How can you just put it down? You have to wait a while, you are too anxious." Chen Laoshi hugged his chest with both hands, stared at the pot with wide eyes, and scolded Chen Zairong with a slight lesson. But he forgot that he was also so anxious yesterday.

"Brother, how much time does it take?" Chen Zairong touched his forehead and asked anxiously, staring at the pot without turning his eyes.

There are many concentration technologies in modern society. Just implementing decompression, reducing the boiling point of water, and accelerating the evaporation rate of water is enough to improve efficiency. Now without this condition, we have to use the most primitive "boiling sea into salt" evaporation method, which takes a lot of time. Chen Wanrong estimated briefly: "It takes at least one hour."

"That's so long?" Chen Zairong looked disappointed and grabbed the hilt of the sword with his left hand: "Then I will sharpen the sword while watching." He is a good sword. He has a good sword and has not yet opened his head yet, so he always mutters. If it weren't for the novelty of producing hot alkali, he might have left nothing else and went to sharpen the sword.

While sharpening the sword and waiting for the result, both of them are not responsible for the mistake. This is indeed a good idea.

Chen Zairong is the kind of person who wants to act after saying that, so he must say "I'll get the whetstone" and go there like a meteor.

Looking at his back, Chen Wangshi smiled: "Why is this kid so anxious?"

"It's always a virtue that is honorable. What's wrong with this?" Chen Laoshi did not forget to protect his precious son.

Chen Zairong's actions were really fast enough. After Chen Laoshi and the others said a few words, he turned around, holding a wooden basin in his left hand and a bright blue whetstone in his right hand, about one foot long, about two inches wide and about one inch thick.

Put the whetstone on the ground, put the basin on the left hand, grab the hilt of the sword with your right hand, draw the sword out of the sheath, and hear a choking sound. The long sword has been unsheathed and shines in the sunlight.

"So bright? It's much brighter than the one before?" Chen Laoshi was shocked when he saw Sanchi Qingfeng.

Chen Wangshi understood Chen Zairong’s thoughts very well: “This is a good sword, why would Hao Zairong be sharpened out in a hurry?”

Chen Wanrong picked up the whetstone and saw that the texture was hard and smooth, and he felt a soft texture when touched with his hands. It was a good whetstone.

Whether a sword can exert its power is not only about having a good casting level, but also about having a high level of maintenance. In modern society, there are many ways to maintain equipment, and it is usually about refueling and regular maintenance. Expensive equipment also requires the establishment of a special maintenance base, which requires constant temperature and dryness, and many other conditions.

In ancient times, there were no such many maintenance methods. Maintaining swords mainly involves good whetstones. Therefore, whetstones are not only an excitement for the sword, but also an important condition to ensure that the sword is unparalleled. Anyone who loves swords must have high-quality whetstones.

Chen Zairong loves swords and his family is so poor, but he is not surprised at all to have such a high-quality whetstone.

"What a good whetstone." Chen Wanrong looked at the whetstone.

Chen Zairong was very happy: "This was given to me by Master Zhang. I heard that the whetstone in the Military Equipment Supervisor is better and bigger than this one. The larger ones are dozens of kilograms and hundreds of kilograms."

It was Zhang Deming again. He was so kind to Chen Zairong that he not only gave him a sword, but also gave him a whetstone to maintain the sword. This friendship is touching.

"Our Tang army must bring such a whetstone with them in marching and fighting." As soon as the weapon was raised, Chen Zairong's box was like a faucet that opened a box, and it was unstoppable: "Every time we go into battle, the soldiers must sharpen their swords."

The reason why the Tang Dynasty army was invincible and invincible was not only because the Tang Dynasty army had the most advanced equipment in the world at that time, but also because their preparations were excellent. Even before entering the battle, they were included in the list of sharpening their knives and adjusting their weapons to the best state. With such a full preparation, who could win the battle without winning the Tang army?

Chen Wanrong was more respectful to the Tang army, an army with outstanding military achievements, and asked, "How to sharpen this?" Chen Wanrong had never seen the sharpening of the sword before, so he was really curious.

"That's right." Chen Zairong took the whetstone and placed it flat on the ground. He squatted slightly, stood up with a squat, poured some water from the basin with his left hand on the whetstone, held the hilt of the sword with his right hand, pressed his left hand on the tip of the sword, slowly pushed the sword body, and moved back and forth on the whetstone.

"This sword sharpening is very particular. You cannot use brute force blindly, and the force must be used evenly." Chen Zairong explained the tricks of sharpening the sword while sharpening the sword.

Chen Wanrong has never sharpened his sword, but has only sharpened a kitchen knife. His level is not very good. The knife sharpened by Zhang Sharpener, who is specialized in sharpening his knife in the community, is easy to use. Zhang Sharpener has a skill to sharpen his knife, and the knife he sharpened is very useful and very sharp. He said that sharpening a knife is a science, Chen Wanrong agreed from the bottom of his heart.

Chen Zairong knew a lot about the knowledge of "hardening the green edge". He told the story of "hardening the green edge", which made Chen Wanrong refreshed. He never expected that there were so many things to do with sharpening swords. Compared with what Zhang Daoshi and Chen Zairong knew, the difference between the little witch and the big witch was too far.

The kitchen knife at home was sharpened by Chen Zairong, which was very easy to use. Chen Laoshi and Chen Wangshi had never heard him talk about this science. Although he seemed to understand it, he knew that this knowledge was quite good. His baby son was so capable that Chen Laoshi was so happy that his face was shining and he kept touching his hot face: "Zairong, who taught you this? There are so many knowledges."

"Some of them were read in books, and some were thought of by myself." Chen Zairong replied while sharpening his sword: "All sword-making masters are good masters. Gan Jiang Moye have been remembered forever and are extremely sharp. I was thinking that Gan Jiang Moye, the two masters, are not only masters of sword-making, but also good masters of sharpening his sword. Otherwise, Gan Jiang Moye would not be so sharp."

The sharpness of Gan Jiang Moye has been passed down through the ages. When people mention Gan Jiang Moye, they praise the two of them as great sword-making masters. Few people praise them as masters like Chen Zairong for being a master of training. It is really commendable that he can think of this.

Chen Wanrong didn't think of this, and praised Chen Zairong's words: "You are very reasonable. The knowledge that a master knows is so vast and profound. It is as far as the sea, and it cannot be exhausted. Gan Xie Moye is not only a master of sword making, but also a good master. I think they are also very accomplished steelmaking masters."

"Yes, brother, I think so too." Chen Zairong agreed loudly.

Chen Wanrong admired Chen Zairong's thinking attitude and encouraged him: "Zairong, you can use your brain when learning, which is very good. If you study without thinking, you will be roundabout, and if you think without learning, you will be lazy. If you learn the trick of sharpening swords from books, and if you think about it yourself, you will have the current knowledge. This is very good, and you must keep it in the future."

"Brother, don't always say good things." Chen Zairong said humbly, agreeing with Chen Wanrong's words: "Learning without thinking is circumspect, thinking without learning is slack. Brother, you said it very well. This is how our school teaches us. Not only do we need to read more, but we also need to think more and practice outside the school."

After hearing this, Chen Wanrong sighed! The scientific system originated in the Sui Dynasty and became the Tang Dynasty, but the imperial examination system in the Tang Dynasty was a good way for the imperial court to select talents. Most of the famous officials in the Tang Dynasty who had been famous throughout the ages came from the imperial examinations to select scholars.

This good result has a lot to do with the excellent academic style of the Tang Dynasty. The scholars of the Tang Dynasty not only could speak the words of saints, but could also use their brains to think and practice in society. It is not pedantic. This is similar to the academic style we advocate now. It is not like the scholars in the Ming and Qing dynasties. They could only write "eight-legged essays" after studying the scriptures for a long time.

This good academic style made the Tang Dynasty highly developed scientific and capable officials, which may be an important reason why the Tang Dynasty was able to become one of the most powerful dynasties in Chinese history.

Chen Wanrong thought very excitedly that such a good academic style and enlightened society in the Tang Dynasty would accommodate all walks of life and attach more importance to technology. He would definitely have a great future in the Tang Dynasty to engage in chemical engineering.

The excited Chen Wanrong looked into the pot. The water vapor in the pot was rising, the boiling water was rolling, and the water was much less. After a while, you could get the alkali.

Chen Zairong held the sword in his right hand, held the sword in front of him, looked at the blue-shining sword body, and gently scraped the sword thumb with his left hand, looking excited: "Hand, good sword! Brother, look, this pattern is more beautiful and much better."

The patterns on the Damascus knife are not for viewing, but they have other uses and can increase their power. The patterns on the blade are jagged after being sharpened. Of course, this can only be seen under a microscope, which makes the knife much more powerful.

Some of the swords and daggers I have seen have patterns, which should be the contribution of Damascus knife to the world's knife industry. I have always thought that the iron, namely Damascus steel, which was introduced to China during the Northern and Southern Dynasties, will definitely arouse the interest of our ancestors, and our ancestors will definitely absorb their strengths and then refine high-quality steel.

Therefore, the pattern is no longer unique to Damascus steel.

The extremely excited Chen Zairong didn't wait for Chen Wanrong to react, throwing the cloth piece of the sword in his hand into the air. When his wrist trembled, a bright sword light flashed, and the long sword in his hand slashed straight towards the cloth piece.

Chen Zairong originally wanted to try the sharpness of the sword to see if he could cut the cloth floating in the air, but it did not achieve the goal. The cloth was pasted on the sword and did not divide it into two pieces.

After copying his hand, he grabbed the cloth piece and opened it. There were only some small holes on the cloth piece. Chen Zairong was very upset: "This sword is too... and I can't even cut the cloth piece."

Chen Wanrong understood that he had heard Zhang Deming say that Ye Tianheng had a sword that could easily cut open the scarf, so he tried this way. After a try, the sharpness of the sword was far inferior. Can he not be upset? He comforted him and said, "After Rong, it is very time-consuming to build a good sword. Your sword doesn't take much time, so it's already good to have such sharpness. It's cast three-foot sharpness and move the sword to the sky. As long as you have such aura, the sharpness of the sword falls second."

"Cast three feet of sharp edge, and use a sword to look towards the sky! What a great spirit!" Chen Zairong blurted out.

The aura of this words was extraordinary, and Chen and his wife nodded and praised them. Chen Chen turned their eyes and commented: "Big words, this is talking big words. When you say this, people will be excited when you listen!"

"Dad, how did you say? This is called momentum! You need this kind of courage to write poetry and do articles!" Chen Zairong defended Chen Wanrong and suddenly slapped on his thigh: "Brother, you can do poetry? Brother, can you help me match a couple, okay?"
Chapter completed!