Seeing Li Tian's face so solemn, Ye Bufan could only take a deep breath, quickly stuffed all the charcoal around him into the furnace mouth with both hands, stepped on the iron under his feet, and suddenly pulled the bellows with both hands again.

The flames broke out instantly, the tongue of fire rose straight to a height of three meters, the temperature became hotter and hotter, Ye Bufan only felt that he was about to be melted, and hurriedly ran the Nine Dragons Technique, covering the spiritual power on the skin of his body, turning it into a transparent barrier to resist this terrifying temperature.

The five-grade iron gradually melted at this terrifying temperature, and Li Tian's eyes froze, and he instantly put the iron on the Returning Sword.

"Tempered, drizzle!"

Li Tian let out a low sigh and raised the casting hammer to hammer the iron with a strange movement.

Ding~Ding~Ding~

The light casting hammer gave the impression of being slower and slower, but with such a light movement, the iron was integrated into the heart sword to a degree that was visible to the naked eye.

What no one knows is that it's not slow at all, it's extremely fast. The trajectory of the casting hammer is an afterimage left behind by the extreme speed.

In just the blink of an eye, Li Tian had already swung out thousands of hammers, and the iron pieces were all hammered into the heart sword under the hammer of a thousand hammers.

After the integration of the iron block, the length of the Returning Sword was originally just over one foot, but it increased to about three feet.

Li Tian's face did not change, he calmly put the Returning Sword into the cold water, and quickly picked it up, his eyes quickly swept from top to bottom behind the side of the sword, and threw the Returning Sword into the furnace fire again.

"Teacher?" Ye Bufan looked at Li Tian's movements in confusion, and said secretly: It stands to reason that the Returning Heart Sword has been re-tempered, why would the teacher throw it into the furnace again?

Li Tian didn't look back, but his eyes were a little solemn, looking at the Returning Sword in the hearth, and said, "Don't ask yet, take a closer look." ”

Ye Bufan could only give up, and looked at the Returning Sword in the fire, and the Returning Sword was red from the fire.

In the fiery sound of "pop", the sword body became even more bent and deformed.

Li Tian quickly drew out the Returning Sword and struck at the crooked place on the Returning Sword again.

Bang ~ Bang ~ Bang ~

After a few hammers, the bent place of the Returning Sword was knocked flat, and Li Tian put the Returning Sword into the furnace fire again.

Ye Bufan looked at Li Tian's movements and fell into contemplation, the teacher seemed to be beating the Returning Sword indiscriminately, but after the beating, after the place where the Returning Sword was cocked just now was knocked flat, it always felt even harder.

"Teacher, this is to remove the impurities from the sword again?"

Li Tian smiled on his face and said, "Not bad." ”

Ye Bufan thought about it in his heart for a while, looked at Li Tian seriously, and said, "It stands to reason that the impurities in a weapon should be removed when the iron is struck, why would the teacher still do it?"

Li Tian took out the Returning Sword from the furnace again, pointed to the upturned place, and said lightly: "You can see it yourself, sometimes what you see by yourself is more convincing than what you listen." ”

I saw that although the place where the Returning Sword was raised was burned red, there were several particularly conspicuous black impurities.

Ye Bufan was stunned, "How is this possible? How can there be so many impurities." ”

The Guixin Sword was forged by him, and he knew best whether there were impurities in the sword. He was absolutely sure that when he was striking iron, he had absolutely removed all the impurities in the pig iron.

Even if Li Tian added a piece of iron just now, but the quality of that piece of iron does not know how many times better than the iron he punched, he trusts Li Tian very much, it is absolutely impossible for him to deliberately put the iron into the heart sword to fuse.

So there was only one explanation left, that is, this impurity, which was left by himself, his face became gloomy, and he lowered his head with some self-reproach.

Li Tian glanced at him and said, "How can I not believe that this is your residual impurity? However, it is no wonder, after all, when I first saw my residual impurity, I also reacted in the same way as you, so I understand your mood very well at the moment." You've surpassed me by much, much in comparison. ”

After listening to Li Tian's words, Ye Bufan's eyes regained a little clarity, raised his head to look at Li Tian, and said, "Teacher, what you said is true?"

Li Tian asked rhetorically: "Do you think that in addition to being more powerful than you now, and having more forging experience than you, where can I compare with you?"

Ye Bufan shook his head and said, "The teacher is equivalent to my father to me, and I don't dare to compare with the teacher." "A teacher for one day, a father for life, this Chinese teaching passed down through the ages he deeply remembered.

Li Tian smiled faintly, didn't say anything, put the casting hammer in Ye Bufan's hand, and said, "Next, I'll leave it to you, your goal today is to temper the Returning Sword a hundred times without destroying it." ”

After a year of getting along, Ye Bufan's respect for him, he saw it in his eyes, and after hearing him say that the teacher was equal to his father, he didn't know how sweet his heart became.

How could Ye Bufan not be able to see Li Tian's innermost thoughts, and also smiled faintly.

He took the casting hammer and followed Li Tian's movements just now and knocked lightly towards the place where the Returning Sword was raised.

Ding~Ding~Ding~

Ye Bufan's movements were definitely very slow, really slow, a hammer was slower than a hammer, but one hammer after another, it continued to knock on the black impurities on the Returning Heart Sword.

When you finish knocking once, put the sword into the furnace and burn it red, take it out again and continue to knock.

The first twenty times, Ye Bufan hadn't felt anything yet, but after the thirty-first time, he felt a faint resistance from the Returning Heart Sword.

At first, he could accept this resistance, but when he hit it for the thirty-fifth time, this resistance suddenly became stronger and stronger, and with each additional tempering, the resistance became stronger and stronger.

So much so that every time he hammered, he almost consumed a lot of Nine Dragons Secret spiritual power before he knocked it down, otherwise with his current body, he would have been exhausted.

For the thirty-ninth time, just as he was about to break through the fortieth time, Ye Bufan suddenly felt that the resistance on the Returning Sword suddenly became stronger again, and there was an astonishing pressure in the resistance, preventing the casting hammer from smashing into the sword body.

Ye Bufan couldn't take care of it so much, and at this moment, his mind was completely invested in this hammer, and the Nine Dragons Jue was running to his hands again and again.

With a hideous face, he roared: "Break through! Break through for me!"

He didn't notice that when he was frantically running the Nine Dragons Technique and trying to break through the ninetieth tempering, the Nine Leaf Jade Pendant on his neck suddenly emitted a very cool aura and merged into his body, and in an instant, it merged into the meridians of his whole body, and finally into the spiritual power of the Nine Dragons Technique.

After this cool aura was integrated into the spiritual power of the Nine Dragons, the casting hammer in Ye Bufan's hand suddenly emitted a faint transparent aura, and this aura fluctuated slightly, instantly vacuuming the surrounding void.

"This is?" Li Tian looked at the casting hammer in Ye Bufan's hand in shock, this breath was very familiar to him, this was the fluctuation of the Xuan Qi released by the Xuan Technique, but Ye Bufan was not a Xuan Qi at all, and there was no trace of Xuan Qi in his body, how could he release the Xuan Technique?