"Hehe, I'm sorry, I've been waiting for this little brother for a long time, and I have to be cautious about such a special thing. At this time, Mr. Liu reversed his indifference just now, and said very enthusiastically: "Look, I patronized and watched things, and I didn't even pour a glass of water, little brother, do you want to drink coffee or tea?"

Li Shan waved his hand, indicating that he didn't want to drink anything, but Mr. Liu thought that Li Shan was polite, so he instructed the waiter: "Xiao Zhang, pour this gentleman a cup of coffee." ”

He turned his head to Li Shan and said, "For this special thing, we want to examine it carefully, I'm afraid it will delay a little time, don't you mind?"

"Don't mind, just ask Mr. Liu to start a good inspection. Li Shan said very generously, he was also very curious about what the composition of this battery is made of.

So, Li Shan followed Mr. Liu to the back of the laboratory and began to inspect on unknown equipment.

The store seems to attach great importance to the inspection process, the inspection process is also very cumbersome, the content of the test mainly includes the battery's power, radiation, electricity and voltage for comprehensive testing, and they can detect the ingredients in the battery without damaging the battery, which also opened Li Shan's eyes, but I don't know what the principle is, but it doesn't matter, the important thing is that they have been tested and finally came to a conclusion, and at the same time, Mr. Liu confirmed his conjecture, that is, the composition of this battery is the legendary graphene.

Graphene is a carbon atom sp⊃2; Hybrid orbitals form hexagonal two-dimensional carbon nanomaterials with honeycomb lattices.

Graphene has excellent optical, electrical, and mechanical properties, and has important application prospects in materials science, micro-nano processing, energy, biomedicine, and drug delivery, and is considered to be a revolutionary material in the future. Physicists Andrei Geim and Konstantin Novoselov of the University of Manchester were jointly awarded the 2010 Nobel Prize in Physics for successfully separating graphene from graphite using micromechanical exfoliation.

As the thinnest, strongest, and most electrically and thermally conductive new nanomaterial discovered so far, graphene is known as "black gold" and is the "king of new materials", and scientists even predict that graphene will "completely change the 21st century". It is very likely to set off a disruptive new technology and new industrial revolution that will sweep the world.

Once this material came out, it attracted wide attention, and now many merchants are promoting their products in the name of graphene, in fact, they are only a little bit of graphene, is it not comparable to the graphene battery on hand now.

The above are all Li Shan through Baidu search, now finally know its composition, although for graphene this material Li Shan also has only a vague concept, but also clear that it is a very precious material. Li Shan doesn't feel any regrets about selling this battery, as long as it can be bought with money, it's not a thing. This is mainly compared to his battery made of special pulverized coal, which is a priceless treasure in his mind.

He now has another graphene battery in his hand, which can also meet his current needs, but it really can't be done, and there is that special battery. And his main problem at the moment is that he is short of money, and there are many places to spend money, forcing him to give up one of them.

After getting the final inspection conclusion of this battery, Mr. Liu's heart blossomed, and the battery made of this legendary material is now in his hands.

In the past, these graphene materials were not easy to obtain, mainly because the acquisition process was extremely complex and time-consuming, resulting in their high prices. Generally, it is the strength of large enterprises or scientific research units will have this investment, and the obtained graphene materials are generally preferentially used in some important fields, such as aviation, aerospace and other important projects related to the national economy and people's livelihood. In terms of civilian use, there is still a considerable distance. And if you want to get such a thing in private, it is extremely difficult, and you can't get it with money, and you generally need a strong relationship or background.

Ordinary people finally got such a point, why don't they hide it, and they won't take it out easily. And today this person doesn't know what's going on, but he is willing to take it out and sell it, I'm afraid he doesn't know the true value of this kind of thing, and the other is that he is very tight now, and he has to sell this thing, no matter what the case is, he has to leave this thing even if it costs a lot of money.

This Mr. Liu is also an old man, although his heart is happy, but his face is not much revealed, he can not show too eagerness to make the other party feel that the other party is a strange thing to live in, and he can't make the other party feel that there is no profit, and there is still a faint expression on his face: "This brother, how much do you plan to transfer?"

Li Shan has some understanding of the market of this piece of UAV, which is mainly due to the fact that when repairing the UAV at the peak of the joint maintenance department, in order to price those parts, the market has also been explored, but those are some general parts, and the price on the market is clear at a glance. As for the value of special items such as crossbow bolt launchers and graphene special batteries, he has no concept at all, and can only be valued according to his own psychological expectations.

When he came, he also had a rough estimate of the value of these things, the crossbow launcher, he estimated 12,000 yuan, but the result was only 8,000, which was quite different from his own psychological price. It seems that my expectations are a little high, but they are not unacceptable.

As for this graphene battery, its value should be much higher than that of a crossbow bolt launcher, and the price he expected in his heart was fifty thousand.

When Mr. Liu asked him how much he wanted to shoot this battery, he hesitated for a while, just like the crossbow bolt launcher in front, his estimate was a little high, so for this battery, he thought about whether it was beyond the price of people's hearts, but there is a good saying, that is, the sky-high asking price, and the money will be paid back on the ground. Report the price as much as possible, if the price is low, won't you suffer a loss?

Thinking of this, he boldly stretched out five fingers.

When Mr. Liu saw the other party bidding for the price, he finally breathed a sigh of relief in his heart, and felt that it was not a big problem to win this treasure today. But he couldn't agree so quickly so easily, so he shook his head and said, "This price is too high, we can't do it, I can only get this amount." As he spoke, he held out two fingers.

20,000, sure enough, their price is lower than their own, but this is only the other party's first bid, and there should be room for bargaining.

"Mr. Liu, this battery of mine is a rare thing in the market, usually you just want to buy it can't be bought, the price I give you is really not high, I believe that out of this door, there are people who want it, don't you say?" Li Shan said.

"That's right, you can see that we are also very sincere, and we hope to be able to complete this deal, otherwise, how do you think it will be when it comes to this number?" Mr. Liu stretched out three more fingers at this time.

This is close to my own expectations, but can I still fight for some more? So Li Shan had a while with the other party, and finally set the price at 35,000.

"This little brother, we will be friends in the future, this is my business card, you can also see from our concessions, we are indeed very sincere, and I hope that if there is anything good in the future, the little brother can give priority to this store. The price has been negotiated, and Mr. Liu also seemed very relaxed, and began to set up with Li Shan, who can come up with such a special battery, how can he not be an ordinary person.

He took a serious look at the young people opposite, but saw that he was wearing a pair of glasses, and from behind the spectacle lenses, he could see that his eyes were slender, his lips were turned out, and his cheeks were sunken.

This Mr. Liu is also a person who has been trained for a long time, and he knows that this person uses a special method to disguise his true face, and he thinks that this person is also cautious enough.

Although he couldn't see the true face of this person, Mr. Liu felt that this person should not be very old, and being able to have such a special battery was enough to show that this person was not simple, so he didn't dare to snub the other party at all.

In fact, what he didn't know was that Li Shan had almost planted a heel on this, so he had to be wary, once he took that strange piece of jade to someone to identify, and the result was almost intercepted halfway.

Therefore, this time, he must not act carefully, he knows that the husband is not guilty, and the truth of the guilt is not guilty, and the battery in his hand is also a special item, since you can take one piece, you can get the second piece, the third piece, if the person in front of him has any ideas that should not be there, he has already thought of a way to deal with it.

Li Shan is right, people's greed is sometimes a matter of a moment, in the face of interests, some people tend to take risks because of this, at this time Mr. Liu suddenly had such an idea in his heart, if he can take this kid down, maybe he can get a greater harvest, but this thought is just a flash.

This made Li Shan, who had been paying attention to him, clearly see that a strange spark suddenly ignited in his eyes, but it was quickly extinguished, and Li Shan couldn't help but secretly breathe a sigh of relief.

"How do I pay you?" Mr. Liu said.

"If you can, it's better to use cash. "It's best to pay in cash, which saves a lot of trouble.

"We won't be able to raise such a large sum of money for a while, so you'll have to wait a little longer. Mr. Liu said with some embarrassment.

Thirty-five thousand yuan is still a lot? Li Shan was speechless for a while. Now it's basically electronic payment, and the average person basically doesn't bring any cash, just carry a mobile phone with you, but this is only for the general people, but it's a little difficult to understand for those who are engaged in business, they should prepare some cash, and the money is not much, they are such a big store, can't even take out this point?