Yunyao has a piece of meteorite in his hand, a good material that can make the swordsman crazy, and has been refined by Magic Dance. It is already a pure iron block, which can create a magic weapon in the Spring and Autumn Period.

In the Spring and Autumn Period, the magical sword was released because the sword-casting master had discovered iron, so he often made various attempts to cast an iron sword, and even jumped into the sword furnace to refine the sword with his body.

Because of the iron sword, blowing hair and cutting gold and stones is possible, and sword-casting masters have become a respected profession. In order to obtain a good iron sword, nobles often work hard to ask for a lot of money and give high prices.

Before Yunyao followed Guan Zhong, she traveled around the country and met many people seeking swords and many sword-casting masters.

A sharp iron sword is priceless for those who walk around the world. It can not only be used as a self-defense weapon when going out, but also a manifestation of its style. Others have bronze swords tied with their waists, and those with iron swords immediately stand out.

However, it is not easy to refine an iron sword now, especially to refine iron ore, mainly because the flame temperature is not enough. However, in Yunyao's fief, the technology of building an iron sword has long been conquered. In fiefs, people have long been accustomed to iron tools, and even alloys have been put into use.

"This meteorite was exchanged for when my fief was doing business, and was later presented to me. It was useless to hold it. If I used this meteorite to forge a sharp sword, it would definitely make a legend." Yun Yao took out a large black meteorite from Tianfeng bag and said.

Danji used to think that everything in life was meaningless, and that all beauty was a means of paralysis by the way of heaven. But now, seeing Yunyao's vivid expressions and active spirit of causing trouble, she couldn't help but think that maybe she should feel life well and Yunyao.

"How to solve the problem of the stove? They are in the backyard and cannot enter and exit freely. You can't build a sword stove in the backyard."

"What's wrong with building one?" Yunyao said.

"High temperature, noise, thick smoke..." Danji said that if you don't cook or cook, how can you hide it so easily?

"At first glance, you just don't understand the development of the human race. You came to my fief once more than two hundred years ago, and you have never been there again. You don't know that these problems have been solved in my fief, and have long been in the sustainable development of environmental protection. Look at what these are."

Yunyao took out a stack of paper.

"Tao Paper?" Danji said disdainfully, as if she was saying that she was not an unsavory country bumpkin, and she still knew the objects in Yunyao's hands.

"Do you know who invented the talisman paper?"

Danji really doesn't know.

Paper was invented by Yunyao, and of course Fuzhi was invented by her.

But Yunyao did not boast, but introduced: "In the past, immortals cast magic and arrays with jade plaques and spirit stones. However, over the past century, with the circulation and promotion of talisman paper, the cultivation methods of immortals are being changed by this new invention. Not only is the cost-effective, but it can show different effects as long as it is combined with different ink, so the adaptability is better than jade plaques and spirit stones. In addition, the quality of talisman paper is not bad, and according to needs, there is also the difference between 100-year-old paper and 100-year-old paper, so the effect of a thousand-year-old paper is not worse than that of a top-grade spirit stone. It is more convenient and can be used as you write."

As soon as he opened his mouth, he became an old salesman. There was no way, I got used to it. Yunyao spent a lot of time to promote talisman paper. The advantage of talisman paper is that it comes at the right time.

Danji was silent. She probably knew who invented the talisman paper. It must be the woman in front of her who talked loudly and had a false smile on her face. However, she also knew that the talisman paper was useful. In the past few years, the monks Danji knew have basically changed to talisman paper. She also gave her "Tactic Paper Drawing Methods from Beginner to Mastery". She had one of them herself.

"This is a cool talisman, this is a silent note, this is a smokeless talisman. As long as you use these talismans, you can turn iron into a pleasure." Yun Yao said: "The way of heaven has set up all kinds of hardships for the human race, and we human race can come up with various responses. Isn't this very interesting? To be honest, solving the problem of the way of heaven is really a sense of accomplishment, and it is just as fulfilling as cultivating and upgrading."

Danji was in a complicated mood and said in the end: "Whatever you want, since you want to make a sword that is destined to point to your throat, I won't stop you from committing suicide, but I will keep my own opinions."

"We should not be so dissatisfied." Yunyao distributed the talisman paper to her and said urgently: "Let's go, let's build a sword furnace."

Guan Zhong's family is big, so she doesn't have to worry about not being able to find a place. Yun Yao was not polite either. Since the courtyard was managed by her, she directly found an empty courtyard to build a sword furnace.

"This is a driving talisman. If you stick this on the door, no one will disturb you."

"I haven't seen such a talisman on the market." Danji found that she really didn't know it. Yun Yao, the inventor of talisman paper, has many strange uses, which can be said to be strange.

"These talisman papers are by-products of research and have no sales, so I only made a few pieces myself for emergencies." Yun Yao said: "The monks are hiding in the deep mountains and forests, and no one will disturb them. But this kind of talisman paper will definitely sell well in the future, I'm sure."

Yun Yao said that if the living area of ​​mortals continues to expand and monks have to live with mortals, the driving talisman will definitely be very popular. But it will have to wait for a thousand or two years.

"I think mute notes are the best. With my divine hidden technique, no one can block my cold arrow." Danji also expressed her own experience and the young monk was deeply touched after accepting new things.

"In fact, the best sales are the Qi Gui Talisman, which is the talisman designed and painted by my master himself. It is the work she tried after she survived the heavenly tribulation."

The R&D talisman is as complicated as the design chip, so even Mowu can only do it now. Hongsang is responsible for the main R&D work.

Of course, there are also many monks who want to develop their own talismans, and they are also busy developing them. However, their research and development costs are high, so they have to buy paper after all, and Hongsang's paper is directly provided by Yun Yao.

There are also various inks, and Yunyao also tried every means to invent ink that is more efficient and more capable of withstand magic power. Ink is mainly the Magic Wu responsible for research and development.

"I have never heard of the hundred-year-old paper and the thousand-year-old paper before. Did you talk about the lifespan of the talisman paper?"

"Yes, it's about the lifespan of paper. The longer the lifespan, the more expensive it is. The longest paper developed today is three thousand years of life, and it has no flow through at all. Only a thousand years of paper flows through, and is only auctioned at auction in auction houses, so few people have seen thousands of years of paper." Yun Yao said: "The most common paper on the market is one hundred years, three hundred years, and six hundred years of paper. The effect is actually not bad. It is more than enough to cope with the current level of drawing talismans."

"You really hope that monks will learn to draw talismans in the future. I also have a book called "Tactic Paper Drawing Method" and have read it. I feel that drawing talismans is not a simple thing. As a archer, my hands are already very stable, and I have tried to draw a few pictures and they will be reimbursed. The talisman paper cannot accommodate any error. Not only do you have to control your hands, but you have to completely control the brush. It is too difficult."

"You think it's because you haven't practiced much, and you gave up after just drawing a few pictures. Naturally, you can't learn it well. When you practice arrows, you also gave up after shooting a few arrows but you can't hit the bull's eye?" Yunyao shook his head and taught: "The book says that practice makes perfect, and at least you have to practice basic talisman paper a few hundred times. If you are afraid of wasting talisman paper, you can draw on the wooden board and stone slab, until you are familiar with the basic drawing methods of talisman paper, and then try it, you will definitely learn it."
Chapter completed!