Lin Tian looked at the sword furnace, his eyes seemed to penetrate the pedestal, and the sword-forging method told by the girl zombie flashed in his mind, and he couldn't help but say: "Heaven and earth, fire......"

The ghost blinked, looked at Lin Tian, and said strangely: "Brother Tian, what you are talking about is that men and women are together, sparks are sparked, and then there are some inappropriate and indescribable things for children, which is called the heavenly thunder and the earth fire." ”

"Damn, Lao Tzu despises you!" Lin Tian glanced at him and gave him a middle finger.

"Hehe, this young man is right, men are dry, they are the sky, women are kun, they are the earth, the heaven and the earth are intertwined, and the men and women are intertwined, and they are for the heavens, thunder, and earth. Tang Banqing laughed twice and said very seriously.

Lin Tian and the three of them listened with black lines on their faces, and the old woman said it too directly.

"Earth fire is actually an underground magma flow. Yun Xiaotian interjected.

"Hey, this is to the point, Xiaotian is still a civilized person. Lin Tian Chongyun Xiaotian gave a thumbs up and said with a smile: "The magma flow is a kind of earth fire, as well as the burning of underground coal, the combustion of various flammable gases underground, and so on, these things release a huge amount of energy, through the cracks on the surface, the energy is released, it is the earth fire." ”

"It's just, I don't know, what kind of earth fire is under the sword furnace?" Lin Tian looked at Tang Banqing.

"My old woman is not a geology expert, how do you know what kind of earth fire it is, the ancients said it is earth fire, it is earth fire, just like those mysterious sea eyes, can you explain it? Tang Banqing glanced at a few people and frightened.

Yun Xiaotian and the ghost really glanced around, if they were standing on a volcano, it would be impossible if they didn't have a pimple in their hearts, a volcanic eruption, and even the innate masters could not resist it.

For people, nature is a god, and natural phenomena such as volcanoes, hurricanes, tsunamis, and earthquakes are its supernatural powers, and any ancient warrior is so small in front of it, let alone ordinary people.

Lin Tian didn't care, because he knew that even if there was a volcano hidden underground, it was a stable volcano, because it hadn't erupted for thousands of years.

He had other questions in mind, and couldn't help but ask: "Donald, as far as I know, even the magma itself, the temperature is only more than a thousand degrees, and some materials can't melt at this temperature." With temperatures of more than a thousand degrees, it is easy to do with modern equipment. ”

"It is said that the highest temperature created by humans is 510 million degrees Celsius, which is 30 times the temperature of the center of the sun, created by a nuclear fusion reactor in the laboratory. Even China's artificial solar nuclear fusion reactor can create a high temperature of 55 million degrees Celsius and a sword furnace of more than 1,000 degrees.

Lin Tian's question was not unreasonable, if the materials could not be melted, how to forge a sword, such as a deformed stone, such as the heart of the meteorite in the Qingshuang Pavilion.

"Brother Tian, you're not bragging, how can a high temperature of 510 million degrees Celsius, thirty times the temperature of the center of the sun, be made? What thing on earth can withstand this temperature?" the ghost looked in disbelief.

Lin Tian said with disdain: "Big brother, it's okay to watch less action movies and read more books, there is a kind of thing in this world called a magnetic field nuclear fusion device." ”

"Alas, it's tiring to talk to you literate people. Tang Banqing shook his head helplessly and said, "If a sword casting can create a peerless artifact just by temperature, then what else does a sword caster do." The most obvious example, the bronze sword cast in the Qin Dynasty, its skill is so high, and now it is impossible to crack its process and formula, can this be solved by temperature?"

Lin Tian knew that Tang Banqing was right, archaeologists unearthed a batch of bronze swords from the terracotta warriors and horses pit of Qin Shi Huang, these swords, the sword body is bright, there are a total of eight faces, the error of each edge is less than a head wire, the blade is sharp, the grinding is delicate, and the texture is not intertwined.

There is also a bronze sword, which was bent by a terracotta figurine of more than 100 kilograms, pressed for more than 2,000 years, and the degree of bending was more than 45 degrees, but when the archaeologists removed the terracotta figurines, the bronze sword instantly rebounded straight and recovered naturally.

"The boy was taught. Lin Tian said sincerely, not only because he had gained the understanding of sword casting, but also because he had a lot of enlightenment in refining medicine.

Whether it is refining medicine or forging a sword, it is inseparable from fire, and a key role of fire is to provide temperature, sometimes, it is not that the higher the fire, the better it is for refining medicine, but in the precise control of fire, this is his understanding.

"But you're right about one thing. Tang Banqing then added, saying: "If the material does not melt, it is indeed impossible to forge a sword, but in addition to the method of increasing the temperature of the melted material, other substances can also be added to promote it to melt at a lower temperature." In modern industrial parlance, these substances are called catalysts. ”

"A good catalyst should not affect the properties of the material, the best catalyst can even strengthen the material, the meteorite heart of the Qingshuang Pavilion has not been able to be smelted, one of the reasons is the lack of the best catalyst. I'm looking for the ultimate catalyst to take the properties of the Meteorite Heart to the extreme. Tang Banqing said seriously.

Lin Tian's heart moved, and he couldn't help laughing: "I understand, Elder Tang thinks that this stone of mine is very likely to be the ultimate catalyst for the heart of meteorites?"

"Yes, I had a gut feeling that this was the best catalyst I'd been looking for! I needed to heat it up and determine its properties. Tang Banqing's eyes turned to the sword furnace, his eyes releasing the light of excitement, and he did not hide his excitement and joy.

As a few people talked, the temperature around them had risen even higher, at least nearly ten degrees higher than outside, and at this time, it could also be seen that red light was faintly emitted from the mouth of the sword furnace dragon.

Tang Banqing slapped on the sword furnace again, and an observation opening was opened at a height of more than one meter on the furnace body, and it was even more obvious from the observation mouth that the red light was already shining in the sword furnace. At the same time, the observation hole also happened to see the deformed stone inside the sword furnace.

Although the temperature of the sword furnace was high, both the ghost and Yun Xiaotian couldn't help but be curious, and instead of retreating, they approached the sword furnace, and also looked at the deformed stone in the firelight curiously. The temperature of the sword furnace continued to rise, and the people present seemed to have forgotten the stuffiness in the underground space, and their eyes were fixed on the transformation stone, especially Tang Banqing, and their eyes were even more unblinking.

"Ah......" Yun Xiaotian exclaimed, pointing at the metamorphic stone and shouting, "Look, it's melting!"

Hearing Yun Xiaotian shout like this, a smile appeared on the corner of Lin Tian's mouth, not because of his excitement, but because of ......

Lin Tian's gaze turned and looked at Tang Banqing, Tang Banqing was not affected by Yun Xiaotian's cry at all, nor was he out of shape because of the change in the transformation stone.

She frowned and looked at the metamorphic stone for a while, and then suddenly said, "No, it's not melting!"

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