"It's another miracle, I said that your kid used this as the stage of the Spring Festival Gala today?"

Hearing that Jin Haotian came to witness another miracle, Hao Chenguang on the side couldn't help but laugh and joke.

"Hehe, the Spring Festival Gala stage can't afford to use such expensive props as me." Jin Haotian said with a smile.

"Okay, don't talk nonsense, hurry up and perform your miracle." Hao Chenguang said a little impatiently.

"Look carefully, don't blink." Jin Haotian smiled weirdly, then inserted the Chengying Sword back into the scabbard, then put it back to his waist, and then held the ends with both hands and pulled it forward.

A jaw-dropping scene appeared, the sword that was still sharpened like clay just now was slowly pulled into a circle under the control of Jin Haotian's two hands, and at the most recently, it made a slight click, and the two ends were actually put together like a belt.

"I'll it, it's a miracle."

Seeing this, Hao Chenguang said dumbfounded, and then walked to Jin Haotian, reached out and touched his waist, to verify whether it was replaced by Jin Hao's angel just now, but when he touched it, there was a cold bronze texture on his hand, and the familiar lines on the scabbard told him that the scene in front of him was true.

"I didn't think this was still a soft sword, hey, no, the feeling of holding it in my hand just now was obviously not the feeling of a soft sword, and the soft sword was not so thick?" Jia Tingchun's heart was full of doubts.

He couldn't wait to snatch it from Jin Haotian's waist at once, and then take it to the bronze restoration and appraisal center of his museum, dismantle him, and analyze it with the advanced instruments there.

But this is obviously impossible.

"Xiao Jin, what the hell is going on?" Jia Tingchun couldn't help but ask with concern.

"I don't know what this is, but I guess this sword may have a metal memory function." Jin Haotian said guessingly.

"Metal memories? What does this mean? Hao Chenguang asked nonchalantly.

"Memory metal is also called shape memory alloy. In the 70s of the last century, an alloy with the function of "memory" shape appeared in the world's materials science. Memory alloy is a special metal bar that can be bent easily, so we put it in a glass jar with hot water and the metal bar rushes forward; Put it in cold water and the metal strip will be restored to its original state. In a glass jar filled with cold water, a spring is stretched out, and when the spring is placed in hot water, the spring automatically retracts again. In cold water, the spring restores its original state, while in hot water, it shrinks, and the spring can be stretched and contracted an infinite number of times, contracted and then pulled away. These are made of a smart metal with a memory, and its microstructure has two relatively stable states, the alloy can be changed into any shape you want at high temperatures, and the alloy can be stretched at lower temperatures, but if it is reheated, it remembers its original shape and changes back. This material is called memorymetal. For example, a helical superalloy is annealed at high temperatures, and its shape is in a spiral state. At room temperature, even if it is forcibly straightened with great force, as soon as it is heated to a certain "metamorphosis temperature", the alloy immediately returns to its original spiral form, as if it remembers something. Jia Tingchun briefly introduced the concept of memory metal.

"No, Master, didn't you just say that this only appeared in the 70s of the last century, but this Chengying Sword is a product of the Spring and Autumn Period, thousands of years ago, could it be that memory metal appeared at that time? That's too rebellious, isn't it? Hao Chenguang asked in disbelief.

This is not impossible, the wisdom and creativity of our ancients are beyond the imagination and incomparable of us modern people. For example, the Yue Wang Goujian sword is still extremely sharp, and the decoration on it is as good as before, after the detection and research of scientists, it was found that the swordsmith at that time used the 'chromium sulfide' treatment technology, and according to the history of modern science, this "chromium sulfide" was invented by Germany in 1937 and the United States in 1950, and was listed as a patent. In fact, there are incredible technological elements like this, which have also appeared in the process of archaeology before. Yuan Zhongyi's "Research on the Terracotta Warriors and Horses of the Mausoleum of Qin Shi Huang" has such a sentence: "A bronze sword in the eleventh cave of the No. 1 Terracotta Warriors and Horses Pit T2 was bent when it was unearthed because it was pressed by the terracotta figurines fragments. This involves a term "memory metal", also known as shape memory alloy, which appeared in the world's materials science in the 70s of the last century. Therefore, I suspect that our ancestors actually mastered this technology a long time ago, but because of the subsequent years of war and the special historical circumstances at that time, these technologies were lost to the historical occasions, and if they were handed down and studied in depth, I think the history of world science and even the entire history of the world would have changed. Jia Tingchun first gave a few examples as evidence, and then sighed and said, but when he said this, his mood was full of loss, in fact, in a sense, don't look at Jia Tingchun's age, but his heart is still an angry young man.

"Hey, history only has results, no ifs." This is what Jin Haotian also said quietly.

For a while, several people couldn't help but fall into deep thought, and the three of them were in a heavy mood.

"Okay, let's stop worrying about people here, those things are too far away from our lives, let's care about this first, Haotian, how do you know that he can be folded as a belt?" After being silent for a long time, Hao Chenguang opened his mouth to ask, this question had puzzled him for a long time.

"I also stumbled upon this by accident." Jin Hao Tiandao.

"I went, again unintentionally. You're too unintentional and too interesting," Hao Chenguang muttered.

"Life often changes unintentionally." Jin Haotian dragged a very philosophical sentence.

"That's right, what Xiao Jin said is very reasonable. You kid should remember that this is the most reasonable and good word, whether it is in the antique appraisal or in the attitude towards life. Jia Tingchun said solemnly to Hao Hao Chenguang.

He didn't dare to disrespect the master's teachings, although he could be regarded as Shenhai's No. 1 gentleman, but what made him different from others was that he really respected the teacher, especially when dealing with those seniors with real talent and learning, he was always very humble. So when he heard Master's teachings, he first bowed down very respectfully and said, "Yes, Master." ”

Then he couldn't wait to say to Jin Haotian: "Dude, take it down and let me try it too, the Chengying Sword, one of the top ten famous swords, is also a special wind." ”

"Hehe, when it comes to your hands, it may not be able to make you feel good." Jin Haotian said with a smile.

", there's no one like you." Hao Chenguang smiled and scolded very unhappily.

"Then you can try." Jin Haotian's right hand was gently flicked on his waist, and he saw that the Chengying Sword instantly returned to its original state, Jia Tingchun and Hao Chenguang were stunned, although Jin Haotian was prepared, he was still shocked by this amazing scene.

After Hao Chenguang turned the result, no matter how hard he tried to eat, there was no way to turn the sword into a belt.

"What the hell is going on?" Hao Chenguang, who was sweating profusely, couldn't help but say very angrily.

"Haha, it's about a person's character." Hearing this, Jin Haotian did not miss such an opportunity to hit Hao Chenguang.

", you kid tell me honestly what's going on?" Hao Chenguang asked angrily.

"Hehe, I just said that it's about a person's character, you see." Jin Haotian said with a smile, then took it and bent him very easily.

"Hey, this ...... What the hell is going on? Jia Tingchun, who was curious on the side, also took it and tried it, but the result was still the same as Hao Chenguang, so he couldn't help but ask strangely.

"You kid, don't say anything about character, hurry up and tell us the reason, or I'll break off my friendship with you." Hao Chenguang said threateningly.

"Hehe, there is a mechanism hidden in this sword, as long as you press that mechanism, it will become a boneless soft sword, and if you press it again, it will become as hard as iron." Jin Haotian explained and demonstrated.

"And where is this mechanism?" Hao Chenguang asked anxiously.

"No, it's here." Jin Haotian pointed to a bulge on the hilt of the sword and said.

Hao Chenguang and Jia Tingchun took it, pressed it lightly, and then easily wrenched the sword into a circle, and even folded it in half very exaggeratedly, and then pressed this piece to become straight and straight, no matter how you pull it, it can't move, it's very magical.

It turned out that this mystery was inadvertently found by Jin Haotian when he was trying the sword that his index finger was slightly forced, and the sword became a soft sword, but when he pressed it, it was restored.

"No, there's another problem." Just when Hao Chenguang was switching between soft and hard modes as if he was playing with a toy, he suddenly remembered something and said.

"What's the problem?" Jin Haotian and Jia Tingchun asked in unison.

"Haotian's waist circumference is definitely beyond the length of this sword, but just now he properly circled it, what is going on?" Hao Chenguang asked suspiciously.

"Hey, I didn't have much idea about that." Jia Tingchun also said in confusion, and at the same time he took it and compared it, and found that the sword was definitely at least fifty centimeters shorter than his waistline, but when he wrapped it around his waist, he found that it was just right, it was really full of strange colors.

"What's going on here?" Jia Tingchun looked at Jin Haotian curiously and asked.

"Well, don't look at me, I don't know, if it wasn't for Chenguang just now, I would have realized this by now." Jin Haotian hurriedly waved his hand and said, he didn't adulterate what he said then, and he really didn't realize it.

"What the hell is going on?" Seeing the fake look on Jin Haotian's face from time to time, Jia Tingchun didn't pursue it, but frowned and thought about it by himself.

"Uh, Jia Lao, I estimate that in addition to the metal memory function, this sword may also have a metal telescopic function." Jin Haotian said guessingly.

"Metal telescopic? Well, that's not possible yet. Jia Tingchun muttered a few times in his mouth, then nodded and guessed a little uncertainly, and then sighed: "I really want to take him back to the real room to dismantle him and study it well, this sword has too many mysterious things." ”

"Oh, if you do that, I'll fight with you." Seeing Jia Tingchun, who was about to move, Jin Haotian hurriedly snatched the piece around his waist and said nervously.

If this sword is still in the old man's hand, it will be too dangerous.

"Look at your useless appearance, don't worry, I said no, I won't hit his idea, I won't hit his idea, old man, I want to have a mouthful of spit and a nail to talk about it." Jin Haotian's appearance made Jia Tingchun very unhappy, which shows that he doesn't trust my old man.

"Hey, hey." In this regard, Jin Haotian smirked a few times and did not answer.

At this moment, a crisp doorbell rang at the gate.

Jia Tingchun looked up suspiciously and said, "Hey, who is here?" ”