When Li Congwen saw Li Xuan nodding, he thought Li Xuan really understood, and continued: "Conch shell bionic materials are very simple to produce and can be prepared through 3D printing."

"Unfortunately, however, the ceramic content in composite materials prepared using 3D printing technology is much lower than that of natural conch shells. More importantly, this method cannot reproduce the multi-scale structure and mechanical properties of conch shells, which means that it cannot be artificially exploited. "It's the same as the Tears of Perth, so I completely gave up on this subject two years ago," Li Congwen said.

Li Xuan asked doubtfully: "So you have picked up this topic again now?"

Li Congwen nodded, "This time, foreign countries have made new discoveries about biological structural materials, which gave me new inspiration. Coupled with the above requirements, I feel it is necessary to pick up this topic again and explore it again. A new technology that effectively applies the excellent properties of conch shells to synthetic materials."

Li Xuan gave a thumbs up, "Teacher, you are so awesome. If you really research this, it will be a great achievement."

Li Congwen waved his hand and sighed: "I don't know if my research direction is correct. I hope the idea is correct. I don't seek merit for the future, but only seek benefit for the present."

Li Xuan quickly asked: "Teacher, do you need my help?"

"you?"

Li Congwen looked at Li Xuan with a half-smile, until Li Xuan felt uncomfortable, and then he said: "I am going deeper and deeper into the unknown field. If you want to help me, you should first learn about the known fields." Let’s talk about it after we understand everything in it.”

Li Xuan looked embarrassed. Li Congwen's words seemed to be saying that he was going deeper and deeper into the realm of gods. You, a mortal, should cultivate immortality first.

But Li Xuan also understood that Li Congwen was telling the truth.

From a professional level, Li Xuan couldn't even understand this project.

In terms of financial and material resources, Li Xuan's small amount of money can't even make a splash.

For such scientific research projects that benefit the country and the people, we have always approved how much money we need, how many people we need, and what kind of equipment we need. As long as it is available in the country, we will give it.

"Is this project being carried out in Hainan University?" Li Xuan asked.

Li Congwen raised his eyelids and said, "This is something within the scope of confidentiality."

Li Xuan was stunned for a moment, then quickly said: "I understand, don't ask if you shouldn't ask."

Li Congwen nodded, probably because he was afraid that Li Xuan would misunderstand. He explained: "I can tell you all the above. After all, this thing is just like an engine. People with some strength in the world are studying it whether it can be developed or not. It is not necessary. It’s confidential, but when it comes to specific things, I won’t reveal a single word.”

Li Xuan nodded seriously, "Teacher, I understand."

Li Congwen smiled and nodded, "After talking for so long, my mouth is a little dry, and the tea has just cooled down."

He drank all the tea in the cup in one gulp, then put the cup aside and asked Li Xuan: "By the way, you said you came to Haida to do something. What do you do?"

Li Xuan stood up silently, refilled Li Congwen's tea cup with hot water, and then put it back on the coffee table. "This year, someone in our village has been admitted to Shanghai University. For some special reasons, I came to send her to report."

"Of course, the main thing is to come and see you, teacher." Li Xuan said with a smile.

Li Congwen keenly grasped the key word, "What special reason?"

Li Xuan thought about it carefully and briefly recounted the events of his father's generation more than 20 years ago.

"It's not easy for fishermen. You have to pay attention to safety when you go to sea in the future." Li Congwen just nodded after hearing this, without any change in expression on his face. He is a hard worker. He has been to the depths of Antarctica more than once and has seen strong winds and waves.

Yes, sometimes in order to study some special things, I have to take the initiative to run to typhoons and other dangerous places. I am used to seeing shipwrecks, life and death, and even fishermen.

Li Xuan nodded quickly, "Thank you for your concern, teacher, but my current boat has strong wind resistance, and I will be careful."

Li Congwen nodded, "By the way, Li Xuan, I really have something to tell you."

Li Xuan was stunned for a moment, then his face lit up, "Teacher, please give me your orders."

Li Congwen said: "Aren't you going to sea now? There is something, please help me pay attention to it at sea."

"What?" Li Xuan quickly took out his mobile phone, "Teacher, tell me, let me remember it."

Li Congwen smiled and waved his hand, "Don't be so serious. I'm just trying my luck and casting a wide net to see if a blind cat can catch a dead mouse. You don't have to search for it deliberately. Just pay attention to it for me when you go to sea."

Li Xuan nodded, "Teacher, please tell me."

Li Congwen said: "They are some relatively rare and rare shells. If you find any, just keep them for me. Don't worry, I don't want them for nothing. I will give you whatever the market price is. And no matter what kind of shells you sell,

You don’t have to be secretive to give it to me. With my endorsement, you can even live it openly. Of course, if you encounter a living body, you have to send it to me immediately."

Li Xuan was stunned, "That's it?"

"That's all. Do you think this is simple?" Li Congwen said with a smile: "The snail shell I want is really rare. Like ordinary snails, they are just like ordinary shells here, so they are not rare.

"

Li Xuan was stunned for a moment, and then he understood.

Indeed, although conchs such as the nautilus, tango conch, Wanbao conch and French conch are rare, they can still be seen occasionally in the market and auction houses.

Even things that can be seen occasionally in the market are not rare in Li Congwen's case.

"Teacher, I wonder which shells you want me to pay attention to? Do you have a specific name?"

Li Congwen nodded slightly, "If it's alive, please help me keep an eye on the nautilus. If it's empty, I urgently need a straight-shelled nautilus. This is the main thing. Everything else is fine. For the rest, if you see even you

If you don’t recognize an extremely rare and weird snail, you can send me a photo and I’ll see if it helps.”

Li Xuan was stunned, "Straight-shell nautilus?"

Li Congwen looked at Li Xuan, "Never heard of it?"

Li Xuan quickly shook his head, "I know."

The straight-shelled nautilus is a very ancient creature. Its appearance can be traced back to the Ordovician period, about 230 million years ago.

At that time, straight-shelled nautiluses were at the top of the marine food chain, with body lengths exceeding five meters.

However, the straight-shelled nautilus is not the ancestor of today's nautilus.

The nautilus, which lived in a rolled shell at the relatively bottom of the food chain at that time, was the ancestor of the nautilus.
Chapter completed!