"There is nothing we can do..."

"Using Ten Thousand Refined Steel to recast Vairocana's blade - this matter can only become a thought of mine."

Black Knife—a name full of style.

Just hearing the name makes people feel amazing!

Qingdeng didn't know how to forge swords.

However, based on the chemical knowledge he learned in his previous life, he felt that the "ten steelmaking" mentioned by Kiryu's boss was probably tungsten steel!

Tungsten steel is a cemented carbide, known as the tooth of modern industry. It has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance, and corrosion resistance.

In particular, its high hardness and wear resistance remain basically unchanged even at a temperature of 500°C, and it still has a high hardness at 1000°C.

If tungsten steel can be used to forge swords...that would be incredible! It can completely crush the swords of the same era!

But... to be honest, in the feudal era when iron was still made with a hammer, it was hard for Qingdeng to believe that any blacksmith could make tungsten steel.

Even with tungsten steel, it was hard for him to believe that a blacksmith could control such a carbide that could still maintain its hardness at a temperature of 1,000 degrees.

Although it is unbelievable, Boss Kiryu just made it clear that his lord...that is, Kinoshita Rin, owns a black sword!

So, maybe this era does have the mysterious technology to make tungsten steel and use tungsten steel to forge knives.

No matter what, Qingdeng silently remembered the words "Wan Liangang" and "Black Knife" in his heart.

Boss Kiryu’s narration continues:

"After Vairochana appeared in this world, Grandpa took this sword as a family heirloom sword."

"He personally stipulated that only the head of the Yamada Asaemon family can own this sword."

"After my grandfather died, this knife was passed down to my father."

"Since Vairochana came into being, the execution process on the execution ground has become a little more gentle."

"Because Vairocana is so sharp, in many cases, the victims do not realize that they have been beheaded, and they die very happily."

"Because it is the heirloom sword of the 'Executioner Family', it has been soaked in the blood of countless sinners, and the blade glows purple due to the addition of special materials, so it got the name of the 'Demon Sword'."

"I dare not say whether there is a knife in this world that is sharper and tougher than Vairochana."

"But I dare say that when it comes to 'killing people', there is probably no sword in this world that can beat Vairocana!"

"Throughout the four generations of grandfather, father, me, and you, the number of people who have died under this sword has been six thousand, if not eight thousand."

When Qingdeng heard this, he couldn't help but asked:

"Boss Kiryu, you just said: Your grandfather personally stipulated that Vairocana can only be passed on to the head of the Yamada Asaemon family."

"If this is the case, then I am not qualified to own this sword."

As he spoke, he specifically raised his gaze to look at the demon sword in his palm.

Boss Kiryu smiled slightly:

"Ju-kun, you don't have to worry."

"Since my father's generation, no one has followed this ancestral system."

"If we really act according to this ancestral system, I am not qualified to own this sword - I left the family long ago, and I am not the head of the family."

"I won't go into details."

"In short, after I left the family and went through a series of things, my father and I were reconciled."

"Father decided to entrust Vairocana to me."

"No matter what, this sword will always be the family heirloom sword of the Yamada Asaemon clan."

"So, as I grew older, I began to think about whether to return Vairocana to the family or entrust it to a trustworthy descendant."

"Tachibana-kun, before I met you, I had thought of handing over Vairocana to Katsura."

"In this way, you can get the best of both worlds."

"Not only can the sword be returned to the family, but it can also be placed in the hands of a trustworthy descendant."

"However...however..."

Speaking of this, Boss Kiryu's tone suddenly dropped.

There was a look of sadness that could not be concealed on his cheeks.

He half-closed his eyes and took a deep breath.

After calming down, he calmly continued:

"Perhaps it's because our family has committed too many crimes, so we received bad retribution."

"Almost every generation suffers from the problem of 'infertility'."

"My father's fertility is already considered the best in the family. He has two legitimate sons, my brother and me."

"As early as the fourth generation, the entire family has been extinct, without a single son."

"As a last resort, I can only adopt a son to inherit the name of the fifth generation."

"Since then, our family has continued the practice of 'adopting children'."

"We widely adopt talents with extraordinary swordsmanship and train them carefully."

"This will not only ensure that the family's incense continues, but also expand the family's business of testing swords and refining medicine."

"After I left the family, the name of 'Yadaime Yamada Asaemon' was inherited by my younger brother, Yamada Asaemon Yoshitomo."

"My younger brother, like our ancestors, also has the problem of 'infertility'."

"Throughout his life, he had no heirs."

"Therefore, he can only follow family practice and adopt a wide range of children."

"He had many adopted children. At the highest number, there were more than a dozen of them."

"Although my relationship with my father is very delicate, my relationship with my brother is very good."

"I've always been in touch with him."

"About 20 years ago, I received the news that my younger brother was seriously ill."

"When I hurried back to my hometown in Edo, my brother was only half-breathed."

"I can still vividly remember the scene at that time."

"My younger brother tried his best to hold my hand and said to me: 'Brother, Kenji will be given to you. Please be sure to train him carefully. He will definitely become an unparalleled swordsman in the world.'"

"Yamada Asaemon Katsumi - the last adopted son adopted by his younger brother, and also the adopted son who amazed him the most."

"Kenji was originally an orphan adopted by the temple."

"This temple is often visited by our family."

"By chance, my younger brother met Katsumi in the temple and was impressed by his swordsmanship talent."

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ps: Bao Baozi's high school chemistry score is always around 30 points. I don't understand alloys at all, so everyone can just watch and enjoy it and don't delve into it.
Chapter completed!