That Hu San quickly confessed, saying that his soft sword was bought from a family surnamed Tie on the outskirts of Chang'an City. This family surnamed Tie has been striking iron for a living for generations, and has a deep research on steel. The Qimen weapons in the hands of many gangsters are passed down from them, and they specialize in making weapons for those who require peculiarities, and they can always meet the requirements of those people. Therefore, this family surnamed Tie is quite famous.

"Jun Xian, according to that Hu San's explanation, it should be around here!" Mulan said.

Li Junxian walked around and found a hill about two kilometers away, with a family on it, Li Junxian immediately said: "It should be there!" ”

Li Junxian took Mulan to the front, slowly climbed up the small hill, and arrived at the door of a house.

"Junxian, why did you come in person? Anyway, it's a blacksmith, so it's a big deal for you to send a soldier and invite him to the special security camp. Mulan said a little unhappily.

Li Junxian shook his head and said, "Underestimate a blacksmith, let alone any craftsman." In the future, they will dominate the world! ”

Mulan didn't know how Li Junxian's blacksmith craftsmen dominated the world, which Mulan couldn't imagine at all. Because during this period, this kind of blacksmith and craftsman did not have a high status, and even was compiled into a special household register, which was almost equal to the lowly status. But Li Junxian, a later generation, knows how popular craftsmen and these craftsmen will become after many years. At that time, a scientist and a senior technician will probably earn more than many big officials.

"Okay, don't talk too much, wait until you don't show any discriminatory claims against blacksmiths!" Li Junxian said.

"Okay!" Mulan agreed.

"Knock knock!" "Is Master Tiegao here?"

"Which one are you looking for? I'm Tiegao! The man inside said.

The man opened the door, and Li Junxian saw that this person was a beard man in his forties. There are very few clothes in this iron height, but the muscles are very large. There is no need for the Demon King Cheng to bite Jin's inferior muscles. This may be the muscles that have been exercised by striking iron a lot.

"Master Tiegao, I'm here to visit you!" Li Junxian said.

"May I ask this general, who are you? And this female general. Do you have something to do with me? Tiegao asked.

"Master Tiegao, the guests are here, aren't you going to invite us in and sit down?" Li Junxian said.

"Please!" Tiegao immediately made a gesture of please.

Li Junxian followed this Tiegao in. Li Junxian saw that there were iron tools all around, and there was a lot of steel around. And in the backyard there is a large melting pot that looks like it is made and smelted steel. Li Junxian also saw a shelf next to the melting pot, on which there were pieces of steel. Or it can't be said to be steel, because there is something weird about the color of these steels, maybe some alloys. Li Junxian also raised his opinion of the ancients again, and the ancients were not useless, at least inventing several alloys. Alloys are no longer the preserve of future generations.

"Two guest officers, what do you want to write? Our Tie family has studied steel for generations, and many kinds of Qimen weapons can be studied. If the guest officer has any special requirements, we can make them happen. Tiegao said.

Li Junxian didn't listen to Tie Gao's words, and came to those alloy samples alone. Want to see a sample of these alloys.

Li Junxian picked up a silver-white alloy sample, picked it up, and the iron high introduced it very enthusiastically: "General, this sample is a special kind of steel that can keep it from rusting. If it's any other steel, I'm afraid it won't be long before it rusts. But this one can last a long time without rusting, so I call it 'stainless steel'. ”

"Not bad! You should have mixed some chromium with steel. That's why it doesn't rust. But I'm curious, how do you smelt chromium? And also use this stainless steel? Li Junxian asked curiously.

"I don't know what chromium is talking about, but I only know that our ancestor discovered an ore on one occasion, and the kind of iron he smelted was very hard. Later, another of my ancestors tried to fuse him with iron, and it turned out that the steel did not rust for a long time. That's why it's called stainless steel. As for how we got it, this is the top secret of our Tie family, and we can't tell outsiders. If you two want to customize some weapons that won't rust, we've got you covered. Tiegao said.

Li Junxian then got another metal, which was very easy to hold in his hand. It feels a lot lighter than other metals.

"It's aluminum, right?" Li Junxian asked.

"I don't know what the guest officer is talking about, it's what our Tie family thought our ancestors found from a kind of soil, and we found that we can get some of this kind of thing from that kind of soil. This kind of thing is very light, very convenient to carry, and can be used to make daggers. However, this metal is very expensive, much more expensive than silver. Therefore, if the guest officer orders this, it will cost a lot. Tiegao said.

"You should be using the thermal reduction method, right? You can't use electrolysis, there is no electrolysis in this era. Li Junxian suddenly said something inexplicable.

"What thermal reduction? Anyway, this thing is very expensive to make, much more expensive than silver. Therefore, the guest officer should be prepared with silver! The Tiegao said.

Li Junxian then looked at a lot of metal products that looked very strange, and they were very heavy, and there were more than a dozen catties in a small piece. Others are lighter, such as aluminum. Others, but they were black metal, and if they were used by the Assassins, many would be in danger. Also, some metals have better thermal conductivity, and Li Junxian can't tell how to get this.

Li Junxian once again felt that the wisdom of ancient times could not be underestimated, although the ancients did not have the knowledge system of later generations, but under the research of dozens of generations, they also accumulated a lot of alloy experience. And some of the materials that Li Junxian saw here were not available in later generations.

Although Li Junxian is not a student of industry, he has somewhat understood that the material industry is the foundation of any industry. In later generations, many scientific and technological successes have been researched, but they cannot be produced, that is, the materials cannot meet the standards. If there are these rich alloy materials in later generations, I am afraid that the national strength will increase several times.

"It's a pity that this kind of good thing is actually covered in dust here!" Li Junxian thought secretly.