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(The content of the previous chapter has been modified. You can see the content after refreshing. The name of the chapter needs to be edited after the holiday. Please forgive me.)

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Carbon-14 dating, also known as "carbon-14 dating" or "radiocarbon dating", is a measurement that calculates the approximate age of a sample based on the degree of decay of carbon-14 method, this principle is often used to determine the age of paleontological fossils.

In layman's terms, organisms replenish carbon-14 through respiration when they are alive, and are constant when alive, and when a plant or animal dies, the carbon-14 in its body begins to decay, which can also be used to detect the age.

The main raw material of banknotes is cotton pulp, sometimes mixed with some hemp pulp, chemical wood pulp, etc., which can be used for carbon-14 dating.

However, the biggest problem with this thing is that it is difficult to be accurate. The closer it is to modern times, the higher the accuracy.

When Wang Aihua found out that the technology used in banknotes was being tested and had not been put into use, he was already extremely shocked.

From a technical point of view, this is an unquestionably genuine note.

At first, he only thought that it was a sample bill made by a central bank in another country, although he was puzzled as to who would do such a thing and how Li Tongchen got it.

Until one day he inadvertently remembered and did a carbon-14 test to see which year it was made.

The results he got shocked him.

This old-looking banknote turned out to be brand new! And the carbon-14 value contained in it is constant, no matter how you test it, there is no attenuation!

"Old Li, where did you get this bill from? Can you tell me?" Wang Aihua said solemnly.

Li Tongchen did not answer his words, but joked: "Your central bank still has a carbon-14 detection device? Can you believe that something with decades of accuracy?"

Wang Aihua said seriously:

"It's not the central bank's equipment. I asked an acquaintance of the Chinese Academy of Sciences to do the test. At present, their latest equipment can be accurate to one month! According to that buddy, the age of your banknote should be negative!"

With that said, he took out an envelope from his arms and carefully took the bill out of it.

Li Tongchen didn't speak. He took the banknotes and looked at them carefully, and then watched the news about deep space hibernation technology on TV. He was very excited.

The banknotes are real, but not the present thing.

It really was born in 2025.

2025 in a parallel universe.

This also explains why the carbon-14 identification results are like this.

And the deep space hibernation technology, like the plot in the mission of the end of the gray tide, appeared in this world.

The last doubt about the commander-in-chief disappeared at this moment.

Li Tongchen excitedly watched the introduction about "deep space hibernation technology" on TV, his eyes suddenly turned red, and he burst into tears.

The great era has come, a great era that will destroy the world, a great era that will turn the tide.

And he has become one of the participants, witnesses, and saviors of this great era.

A lofty sense of mission filled his heart, and a spontaneous pride made this 60-year-old man seem to have regained the passion of the fiery era.

"He De He Neng... He De He Neng..." Li Tongchen muttered as he looked at the hundred-yuan bill in his hand, which belonged to a disciple's testimony.

Wang Aihua, who was on the side, saw that Li Tongchen suddenly burst into tears as if he was possessed, and muttered to himself, and couldn't help but panic:

"Lao Li! Lao Li, are you alright!? Why are you stunned? Is there something wrong? Where did this come from?"

He also had some guesses about this banknote in his mind.

The central bank obviously does not make such things, and those criminal groups that make counterfeit banknotes generally do not have this strength.

It must be a state act to be able to create such realistic banknotes.

Is the Eagle Country secretly engaged in an economic war? Or is a country in Northeast Asia trying to make wool with fake money? Or is it the handwriting of an international criminal group?

Li Tongchen wiped the corners of his eyes and said to Wang Aihua:

"Aihua, I made you laugh... I'm fine... I'm both worried and happy now..."

With that said, he walked directly to the kitchen with the bill, turned on the gas stove, ignited the bill, and burned it.

He has already revealed his identity as a disciple in the virtual space, so he doesn't need this banknote to authenticate his identity.

It's a hassle to keep.

Of course, the commander-in-chief handed them this banknote from 2025. The deeper meaning should be to dispel their doubts.

Wang Aihua said urgently:

"Lao Li, why did you burn this money? Did you get into trouble after all? Well... it's okay to burn it, or it's okay to burn it..."

Then he looked at Li Tongchen and asked:

"What can't you tell me? If you think I can't solve it, let's go to Jiadong. He is now the deputy commander of the military region. move you?"

Li Tongchen was relieved like never before, smiled slightly, and said:

"Don't worry, Aihua, I'm fine. I'm very safe. You can keep me secret about the banknotes. Don't tell anyone... I'm happy today, and we'll have a good drink later."

"You've burned the money, and I don't believe it when I tell others..." Wang Aihua rolled his eyes and said, but he still trusts this old classmate very much. This matter should touch on some secrets at the national level, and he doesn't either. Ask again, "Let me tell you, I came all the way to find you today, and I won't drink Maotai under ten years!"

"Hahaha, you wine bug! How long have you been thinking about my 20-year-old bottle of Maotai?" Li Tongchen scolded with a smile, turned and walked towards the bedroom...

…

Time flies, and a month goes by in a blink of an eye.

In the small courtyard on the outskirts of Taicheng, Shen Feng's conscious tentacles detached from the cyberspace, showing a satisfied smile.

The energy of the Salvation Army is no trivial matter. Since the information of the Purification Society was revealed to the players in the virtual space two days ago, the purge of the Purification Society has begun these days.

Many members of the Purification Society who had been dormant for many years were uprooted, thrown into prison, or directly assassinated and executed.

This is already an open declaration of war against the Purification Society.

But this is nothing, after all, the other party has directly assassinated Shen Feng, and there is no point in continuing to hide.

Over the past few days, nearly a thousand members of the Purification Society have been cleaned up.

Brendan, the president of the Rattlesnake Company, was safe and sound, and was under surveillance under Shen Feng's order.

The Purification Society seemed to be dormant, and there was no response, and the assassination against Shen Feng never appeared again.

What made him a little vigilant was that many members of the Purification Society who were found and executed all chose to goug out their eyes, or stared at the face of the executioner before they died, and there were even some greedy expressions in their eyes.

Regarding this point, Shen Feng also reminded the members of the Salvation Army through the game system, asking them to turn their backs to the executed people as much as possible, and not let the other party see their true face.

Eyes seem to have a special meaning for the Purification Society.

Although he still hasn't figured out what the mystery is.

During this period of time, although Shen Feng had a lot of leisure time, he was not idle either.

Under his control, clusters of nano-machines were attached to the landing gear or cabins of planes, flying to all parts of the world, being sown like seeds and gradually lurking.

The nanomechanical cluster itself that fell from the plane is gray-white, and the refraction of sunlight is reduced by the configuration, as if it is a big bird falling from the sky, which is not conspicuous at all.

Even the radars of various countries are difficult to detect, let alone care.

Like termites, these nano-machine clusters can devour after landing, and then hide in a dark place where they can receive signals, which is extremely concealed.

Although Shen Feng is temporarily active in China, he is not sure that he may go out one day. At that time, these latent nano-machine clusters will play an extremely important role.

This is his life-saving magic weapon.

These days, the "Real Doomsday Game" bracelet has not assigned him any new tasks. Shen Feng is also happy to be at leisure, going to school as usual, and enjoying the days full of fireworks and warmth, and his heart has become much more peaceful.

It was Jingwei's humanoid robot. Although it appeared in the name of a transfer student for a few days, it was too eye-catching. Later, he took sick leave and did not go to school.

Jingwei himself was messing around in the basement every day, and he didn't know what he was doing.

Shen Feng was too lazy to care.

Still this peaceful day is comfortable...

But what made him a little puzzled was that the silent time of the "real doomsday game" this time was a little too long, a little strange...

"Shen Feng, look, how does my appearance look? Does it look realistic?" It was the weekend, when Shen Feng was lying on the sofa eating fruit, he heard Jingwei's voice.

Then I saw a beautiful and handsome mixed-race girl pushed the door and walked in, wearing nothing on her body.

"Pfft..." Shen Feng squirted out all the dragon fruit in one mouthful, and said quickly, "Put on clothes! Put on clothes! You are so realistic!"

At this time, Jingwei was completely different from the previous nano-machine cluster mimesis. It seemed that the skin could vibrate and was extremely elastic. The long hair was also real hair, without the slightest feeling of metal.

Jingwei happily turned around and asked:

"Really? Can you tell if it's a robot? I'm using the latest type of mimetic silicone, and it has temperature and touch. It's actually an artificial skin that feels exactly like a human, and uses bionic mechanical eyes and Human hair, hee hee, everything looks exactly like a real human girl except no hair."

Shen Feng picked up a large towel next to him and threw it to Jingwei, saying:

"Sister, could you please put on your clothes?"

Jingwei wrapped a bath towel~lightnovelpub.net~ rushed to Shen Feng and laughed and said:

"Hahahaha, you little brother! Humans are just like that. I don't need to rely on disasters at all, and can destroy human civilization by relying on beauty!"

Shen Feng's face was full of black lines at this time, and he was speechless for this crazy artificial intelligence. This guy can still play...

Then he said with a serious look: "Sister, get me one too? Your skills are really awesome!"

Jingwei snorted coldly, and said, "I've never heard of a male version of an inflatable doll. What's the use of you wanting a dummy? Would you use it to deceive a little girl's body? Next work!"

Shen Feng was speechless.

You are quite able to take on the role! But why doesn't it feel like a mixed-race transfer school girl, a bit like the aunt of the neighborhood committee?

The two were talking nonsense, and Shen Feng's bracelet shook suddenly. He immediately turned his head to look, and saw a line of blood-red words suddenly appear:

"...attacked...temporarily closed...protected...civilization...combat..."