The sword is the king of a hundred soldiers, and the sword is the weight of a hundred soldiers, and it has the effect of stabbing and slashing as a weapon in close combat. The knife is divided into two parts, the blade and the handle, and according to the form of the handle, it can generally be divided into a round-stemmed handle knife and a flat-stemmed handle knife. Due to its performance suitable for the needs of infantry combat, after the middle of the Spring and Autumn Period, the knife was widely used in actual combat, and became a commonly used military equipment as a representative of short weapons.

After the Spring and Autumn Period and the Warring States Period, the sword has become a "must-have" for scholars, and all officials, nobles, etc. must wear a sword with them to show their identity. The sword ancestor Ou Zhizi cast a sharp blade, "the meat test will break the cattle and horses, the gold test will cut the plate, the thin pillar and hit it, it will be broken into three, and the stone of quality will be broken into a hundred."

The main alloy of the sword cast by Ojizi is a bronze alloy composed of copper, tin, and a small amount of aluminum, iron, nickel, and sulfur. And Ou Xuzi's hand of the Uzi steel, that is, "iron", is the top grade of iron, due to years of war, a large number of weapons loss, even the Yuan Dynasty "iron bureau" stored in the number of "iron" is not much, Bala Toast took great pains to get thousands of catties, has consumed a lot of silver taels.

"Iron" was smuggled into the Tusi Mansion through secret channels, and the Yuan Dynasty specifically stipulated the crime of "private possession of weapons" in the Criminal Code. According to the ban of the "Great Yuan General System", all illegal possession of guns, knives, crossbows, bows and arrows, armor, as well as iron rulers, iron bones and iron post staff with blades that can be used as weapons, are all crimes of private possession of weapons. Anyone who possesses up to 10 pairs of bows and arrows and 10 pieces of private weapons shall be sentenced to death. Possession of a full set of iron armor shall be punished by death, and those who do not become deputy shall be punished according to the number of crimes.

The crime of making weapons is even greater, and the penalty is death and immediate beheading. Craftsmen who make iron tools are strictly regulated by the government to prevent them from crafting weapons.

Although Qinghai Lake is high and the emperor is far away, Bala Tusi does not dare to be too presumptuous, all the projects are operated in the dark, and he is entrusted with carte blanche to the China housekeeper, but he is always observing the changes in the situation, and destroying the evidence as soon as there is a wind and grass.

Bala Toast's message to China was: "If someone denounces, all craftsmen except Ou Xuzi must be extinguished to prevent future troubles, and Ou Xuzi is a rare figure who cannot die." ”

The area of the Tusi Mansion is huge, behind the rockery pavilion that has just been built, several steamed bun-shaped round furnaces with openings on the top are built about two meters high, and there are sheepskin bags used to blow the wind next to the stove, crucibles and forging tools, all of which are ready, and Bala Tusi came to watch it in person.

Bala Toast was just a martial artist, so that the knife could be, and he didn't know anything about the casting of swords, and he curiously circled around the steamed bun-shaped round furnace, which was made of earth and stones, and the opening was above, more than two meters high, and he naturally did not dare to go up with a wooden ladder. On one side is a makeshift house, in the middle of the room is placed a large stove, that is, an oven, a bellows is set up next to the hearth, and on the big anvil is placed an iron hammer and iron tongs, which he has seen in the imperial court Wubei Temple. He was interested in the strangely shaped crucible on one side, which was made of refractory clay from the plateau, and was very large, the largest crucible that Bala Toast had ever seen.

Bala Toast couldn't help but ask, "Master Ou (he changed the name of Ou Xuzi), can you use such a big crucible?"

Ou Xuzi smiled slightly and said, "It can hold a thousand catties of iron juice." ”

Bala Toast asked again: "A thousand catties of iron juice can beat dozens of treasure knives, right?"

Ou Xuzi shook his head: "Haven't you heard that a hundred swords can be made into steel, and it is already very good to be able to forge two treasure knives at most." ”

Bala Toast's face changed, he finally spent a lot of money to get thousands of catties of "iron" from the "Iron Bureau", so there are very few treasure knives that can be cast, the number will not exceed ten, it is too precious, the muscles on his face can't help but shrink for a while, and his feelings are a little low.

Ou Xuzi glanced at him and said, "It's not impossible for Lord Toast to want more, but I don't dare to guarantee their sharpness and hardness, let alone what kind of treasure knife they are." ”

Bala Tusi hurriedly replied: "You are a sword master, of course I listen to you, what I want is a real blade, even the Zhanlu knife is only one left in the world, I will not be so greedy." ”

Ou Xuzi nodded and said, "That's good, now that the craftsman has it, there are still two important things missing." ”

Bala Toast said, "What is it?"

"Refined charcoal for steelmaking and non-freezing springs for quenching. Ou Xuzi returned.

Bala Toast turned around and glared at the butler of China: "Why don't you hurry up and handle these things that Master Ou wants?"

Butler China's face flushed, and he stammered and didn't know how to explain it.

Ou Xuzi shook his head and said: "Casting treasure knife can not use ordinary charcoal, to use plateau pine burned fine charcoal, Qinghai's spruce is the best, it is resistant to shade, cold and dry, and the texture is hard, the wood grain is fine, use the charcoal it burns for the charcoal, the most suitable for casting treasure knife." In addition, I use the double-liquid quenching method, the knife body is extremely hot out of the oven, and it is quickly cooled in the non-freezing spring to make it harder, and because the water quality of the non-freezing spring is clear and free of impurities, it has no effect on the material. ”