The next day, early in the morning, Liu Yu stood in an open space in the center of the blacksmith camp, surrounded by more than 2,000 craftsmen, densely packed and crowded, the people in the front row were squatting or sitting, while the people in the back row were cushioning some stones, stretching their necks, and thousands of eyes were focused on Liu Yu and Kong Jing in the center.

Kong Jing took a piece of iron horn, in this era, these skilled craftsmen have long discovered the basic sound transmission principle, this iron horn can make Kong Jing's words, in this late autumn morning, clearly into the ears of every craftsman: "All the tricks are brightened, Team Liu is going to teach you the method of turning sand and casting armor today, everyone has to learn it from Lao Tzu, if it comes to this time tomorrow, who won't, hehe, then his guy who eats, don't have to stay!" ”

Everyone stared with bated breath, and they didn't dare to take another breath of the atmosphere, after all, Kong Jing had become a living Hades in their eyes, and every word he said was not a joke.

Liu Yu smiled slightly, picked up a wooden frame in his hand, and said, "Everyone, look at it, what is this?" ”

Feng Qian took the lead and said, "This is a wooden frame!" ”

Liu Yu nodded, pointed to the pile of fine sand in front of him, and said, "Then what is this?" ”

Furball crossed his arms and said, "Isn't this the fine sand we picked up from the river in the morning?" ”

Liu Yu said: "Very good, everyone can see clearly!" ”

As he spoke, he put the wooden frame into this pile of fine sand, and then flicked it, and the entire wooden frame was suddenly filled with fine sand, Liu Yu dragged it back, and on this flat ground, the wooden frame had been piled up like a hill of fine sand, full.

Liu Yu took out a wooden target, flicked it on the wooden frame a few times, and removed the fine sand that was higher than the frame, and the remaining sand was flush with the frame, and then he picked up a wooden bowl on the side, which contained sticky rice soup, and poured it on the frame of sand.

The servants around him began to exchange words: "What is Team Liu doing here?" What is this fine sand framed for? ”

"I look like I'm trying to get a whole box of sand."

"Stupid, what a whole box of sand. Team Liu must be trying to make the strongest stone, probably for grinding armor. ”

"Stones? Can this be made into stone? ”

"I don't understand. Our family used to build a city wall, and the bricks of the city were all made like this, and they were poured with glutinous rice juice, and soon the whole wooden frame was fixed. ”

"We all know whether to burn sand into bricks, or to burn clay into bricks, but what do you want a wooden frame for?"

"About, about to be finalized. Hey, I'm not Team Liu, you ask me what to do, just look. ”

In the midst of everyone's discussions, the sand in the whole wooden frame in front of Liu Yu has gradually solidified, he picked up this wooden frame, put it in the air and shook it a few times, and the fine sand in the whole frame has almost not fallen, he nodded with satisfaction: "This rice soup is really good, this is the key to turning the sand, you must not cut corners, otherwise, if you can't fix this frame of sand, you will give up all your efforts!" ”

All the servants and craftsmen shouted in unison: "No! ”

Liu Yu nodded, and concocted it again, made another frame of sand, poured it with rice soup, and fixed it into a whole piece of sand, and the two frames of fine sand, under the sun, began to emit a white light, just like the rippling river.

After Liu Yu finished doing this, he breathed a sigh of relief, took out ten armor pieces from his arms, took out one piece, and held it high in the air: "Everyone said, what is this?" ”

"Stainless steel armor, the one we build every day!"

Liu Yu smiled: "Okay, today I will teach you a way, so that you don't have to manually create these armor pieces in the future!" ”

As he spoke, he put the ten pieces of armor in a frame of fine sand, and face down, and the ten pieces of armor sank into the fine sand at once, leaving only half of them protruding outside.

Liu Yu picked up another frame of fine sand and covered it from above, and the two sand frames were put together like this, leaving only a slight crack on the outside.

Liu Yu took down the two sand frames and took ten nail pieces, only to see that on these two sand frames, ten marks had been left respectively, each half of the nail leaf was deep, and the shape, size, and even the hole of the string of rope left on the nail leaf were no different from the real nail piece.

Maoqiu understood, stood up all of a sudden, didn't hold his arms anymore, pointed to the two frames and said, "This, is this a mold?" Imprint the appearance of the nail piece on the sand frame, and pour iron juice directly into it later? ”

Liu Yu smiled and nodded, picked up the two sand frames, took out a small frustration knife in his arms, and with just one stroke, he drew a thin hole in a nail pit on the very edge, up to the edge of the frame, and he did the same, drawing such a thin line on the edge of each nail frame.

Now even Feng Qian knew: "Team Liu left a passage when pouring steel juice." It's amazing, it's amazing. The clay and fine sand can withstand the heat and will not be deformed, and the steel juice poured into it is the same as the steel juice we usually use to hold the steel juice in a crucible, as long as it solidifies, it will become the shape of ten pieces of armor! ”

Liu Yu nodded, and said: "This is the method of turning sand, the fine sand or clay in the two wooden frames can be fixed and formed after pouring rice juice, and then it can be poured iron juice." Relying on this method, if you make a mold of 30 nail leaves, you can make 30 nail pieces at one time, and the nail pieces that you can only create in 10 days and half a month in the past only need half an hour to make a pattern, and the rest is to polish, rust, and polish. ”

All the craftsmen and servants all stood up with admiration on their faces, these people had heard of Liu Yu's reputation before, but today I saw it with my own eyes, only to know that this person is not only a martial artist, but also a peerless talent, only came to this blacksmith camp for one day, and thought of a wonderful method that none of them thought of, how could it not make everyone admire?

"Team Liu, you are too powerful, where did you learn this trick?"

"Does Team Liu still need to learn? People are stars in the sky and descend to earth! ”

"That's it, my old black is in service today, Team Liu, you can do whatever you want me to do in the future."

Kong Jing hooked the corners of his mouth, and his face sank: "Okay, let me hear it all, from now on, 1,500 people will go to make iron juice, 1,000 people will make molds, and 500 people will polish the finished nail leaves, this month, I will make 50,000 nail leaves every day, that is, equip 1,000 pairs of iron armor, if anyone is lazy and slippery, don't blame my subordinates for being ruthless!" ”

Speaking of this, he suddenly smiled: "If you do a good job every day, add an extra bun to all dinners!" At the end of the month, the mission is completed, and I invite everyone to drink! ”