When the water in the pot completely turned into a green viscous liquid, Qin Yu was not afraid of being hot, so he directly lifted the iron pot and placed it on the ground.

On the other end, the iron pillar had skyrocketing green tendons in his hands, covered in sweat, and almost turned into a rain man, however, even so, the iron pillar still did not stop, but compared to the beginning, a few strokes could split a piece of wood, but now it takes more than a dozen.

Qin Yu just looked at Tie Zhu quietly, but Peng Fei on the side looked a little anxious, he knew that Tie Zhu had almost reached the limit that his body could reach, and if he continued, it would be time to go into shock.

Peng Fei has been trained by special forces, and he knows the pain when a person reaches the limit of physical fitness, not to mention moving his hands, even moving a finger will feel very difficult.

Of course, Peng Fei also knows that if he can break through his physical limit, then his physical fitness will be greatly improved, but even if they are special forces, every time they challenge the physical limit, there will be doctors on the side to follow, and it is not that the challenge is challenged, under normal circumstances, it is to train to their limit for ten consecutive days, and then look for opportunities to break through.

This is a process of quantitative change to qualitative change, and there is no shortcut to this process, no one can break through their physical limits at one time, which will only make them shocked, and if they are strict, they will even lead to heart failure, and it is not impossible to die.

Bang!

When the iron pillar slashed down towards a piece of wood again, the firewood knife in his hand fell directly, and the iron pillar himself fell to the ground, rolling his eyes, which was a precursor to imminent shock.

Seeing this, Peng Fei hurriedly ran towards the iron pillar, but just as he took the first step, he only felt a figure flickering beside him. The next moment, Qin Yu had already arrived at Tie Zhu's side, grabbed the collar behind Tie Zhu with one hand, and then lifted Tie Zhu's whole person up and walked to the iron pot.

"Can't you hold up this kind of training? Tiezhu, open your eyes, if you can't get through this level, what else do you have to protect your sister. Qin Yu came to the iron pot with the iron pillar and shouted at the iron pillar.

For iron pillars. Qin Yu understands very well that in Tie Zhu's heart, his sister is one of his qiē, just like a knight who must protect the princess, and is even willing to pay his life for it, and Tie Zhu guards his sister, and only his sister can arouse his fighting spirit.

Sure enough, when Qin Yu said this, Tie Zhu's eyes slowly opened a slit. Seeing this, Qin Yu didn't hesitate, and directly grabbed Tie Zhu's hands and put them in the pot.

Put the green liquid in the pot now. The temperature was not high, just a temperature that could be accepted by human skin, and the moment Tie Zhu's hands were put in, those green sticky substances were stained on Tie Zhu's two arms. Then, at a speed visible to the flesh, it is absorbed by the opening of the pores on the iron pillar arm.

The pot of green viscous liquid slowly began to reduce. The green tendons of Tie Zhu's hands began to contract slowly, and his face began to slowly recover, and after a quarter of an hour, his eyes opened and he was clear.

"Uncle Shi. Tie Zhu saw the iron pot in front of him, and looked at Qin Yu with some doubts, his consciousness was in a semi-comatose state before, and he didn't know what was going on.

"Alright, let's go chop. ”

Qin Yu didn't say much, waved his hand, Tie Zhu didn't ask again, walked to the wood again, picked up the firewood knife and chopped it.

It's just that this time, when the first knife was cut down, Tie Zhu's face showed a look of surprise, because, before, he could only cut into one-third of the depth of the wood with one knife, but this time, he suddenly reached one-half of the depth of the wood, and his strength actually increased?

Tie Zhu was not stupid, and soon he knew that it must have something to do with the green liquid in the iron pot in which his uncle soaked his hands.

His strength increased, and the speed at which the iron pillar chopped wood also increased, and more than a hundred pieces of wood were quickly chopped by him.

"Okay, don't worry about the wood, if you see those stone tablets, take a carving knife and scratch the stone tablet, remember, just use an ordinary carving knife, not a black gold carving knife. ”

Qin Yu pointed to more than a hundred stone tablets and said towards the iron pillar.

Stone tablet lettering, now most of them are used machine qì or knocking, but there are also carving knives, generally with ugin carving knives, because the hardness of ugin carving knives is very high, but will use carving knives, generally carved some tiny handwriting, not suitable for machine qì or knocking.

However, with the deterioration of modern people's bodies, even the use of ugin carving knives is very rare, firstly because the price of carving is not high, and secondly, because the difficulty is very high, far less convenient than the machine.

After Peng Fei heard Qin Yu's words, his face showed an unbearable look, and it was impossible for a sixteen-year-old child to use an ordinary carving knife to carve words on the stone tablet.

First of all, the stone is very hard, and an ordinary carving knife cannot be carved at all, and even if the strength is reached, the carving knife will probably break, and it is impossible to do it without decades of hard work immersed in it.

However, after listening to Qin Yu's instructions, Tie Zhu did not have any doubts, picked up a carving knife, and walked to the stone tablet.

Bang!

The first knife broke when the iron pillar struck the third time.

The second knife broke when the iron pillar was struck the fifth.

The third carving knife broke when the iron pillar was left behind.

As for the whole stone stele, the iron pillar only left five notches on it, and each notch was very shallow.

"Uncle Shi. Tie Zhu looked back at Qin Yu, there was a look of frustration on his face, Tie Zhu was not afraid of hardship, but the carving knife kept breaking, but his heart began to want to retreat, after all, he was only a sixteen-year-old child, and his heart was not so strong.

"Go on. Qin Yu was expressionless, said lightly, and continued to burn the firewood and start boiling these medicinal liquids again.

The carving knives in Tie Zhu's hand were broken one after another, and after more than a dozen in a row, Peng Fei couldn't stand it, not that he felt sorry for these carving knives, but that he felt that Qin Yu's training methods were a little cruel, such training, if one was not good, it would destroy all Tie Zhu's confidence, once he lost his confidence, it would be impossible for Tie Zhu to move forward in the carving industry in his life.

"Mr. Qin, isn't it ......?"

"I know what you're trying to say. Without waiting for Peng Fei to finish speaking, Qin Yu added firewood and said, "Have you ever heard of Dugu's sword practice?"

"Uh...... This one...... I've heard of it. ”

For Jin Yong's martial arts novels, as long as they are boys born before 95, they should have read them, and even if they haven't read them, they have also watched serials on TV.

Before the age of thirty, it is a soft sword, and the soft sword is changed; before the age of forty, it is a heavy sword, and the heavy sword is used without a blade, and it is not skillful; after the age of forty, it is used as a wooden sword, and the grass, wood, bamboo and stone can be used as a sword, and the flying flowers and leaves can be used to hurt people, and it has reached the realm of no sword and a sword.

However, Peng Fei still muttered in his heart, "After all, this Dugu is just a character in a novel, where is there such a person in reality." ”

Qin Yu seemed to guess what Peng Fei was muttering in his heart, and explained: "Sometimes, novels come from life. ”

No matter more, Qin Yu didn't say anything.

What Peng Fei didn't know was that Qin Yu's special training for Tiezhu was not something he had imagined at will, and in the Jiang family's secret book, there was a thing mentioned.

During the Jiajing and Wanli years of the Ming Dynasty, the Jiang family was famous for the whole metaphysical world, and in the eyes of ordinary people, the Jiang family was a family of jade carvings.

However, this situation was not broken until the appearance of one person, and that person was the legendary carving master Lu Zigang.

Lu Zigang, with a gallium knife and a unique carving method, began to show his prominence, and when he was in his early twenties, he was already famous all over the world, and his carving level could compete with the Jiang family.

When Lu Zigang was thirty years old, the first person in the Jiang family to carve at that time secretly asked Lu Zigang to compete, but this time the result of the competition was Lu Zigang's victory.

According to the ancestor of the Jiang family in the secret book, Lu Zigang's carving method has reached the realm of Taoism, and there is really no trace, Lu Zigang's carving can be said to be arbitrary, but it is natural.

The first person of the Jiang family lost to Lu Zigang was convinced, and after this secret competition, the ancestor of the Jiang family and Lu Zigang also became friends, and later, Lu Zigang told the ancestor of the Jiang family the way he received training since childhood.

This training method is the special training that Qin Yu arranged for Tie Zhu at this moment, however, this is just the beginning.

However, seeing that Tie Zhu had been breaking his sword, Qin Yu also knew that with Tie Zhu's current age, if he didn't mention it, it was estimated that it would be difficult to comprehend the essence of Lu Zigang's training mode.

Therefore, Qin Yu had to speak.

"Tiezhu, I don't know if you've ever seen such a news, someone once could shatter a glass with a sound, do you know what he relied on?"

Tie Zhu shook his head, his face was confused, he was learning carving except for school, and he rarely watched TV and news.

"Relying on frequency and resonance, you have studied physics, you should know the meaning of frequency and resonance, everything in the world has its own frequency, when the external vibration is close to or equal to its natural frequency, the object will resonate, and it may be shattered. ”

"But Uncle Shi, I'm using a carving knife now, and I can't make a sound, how can I reach this frequency?" Tie Zhu asked puzzled.

Qin Yu smiled slightly, "The sound can reach every frequency, because the sound is shaking in a space, in fact, to put it bluntly, all the sounds in the world are generated by vibration, in layman's terms, that is, shaking, if the carving knife in your hand shakes fast enough, then you can reach the same frequency as the stele, and then you can cut through the stele, just like cutting a piece of tofu." ”

That's right, this is what Qin Yu wants Tiezhu to train, and Lu Zigang calls this the shaking carving method. (To be continued......)