Starting as a Wallfacer, his defection to the Three-Body Problem shocked the world.

Colonel Carter was completely numb.

Within an hour, you've been targeted twice. Is the British Empire your Trisolaran organization's headquarters?

But thinking about it this way, it seems like I'll have something to say about shifting the blame when I go back.

You, MI6, can't just blame the Royal Air Force for not cleaning up your own domestic spies and ETO members, can you?

First, there were nearly hundreds of thousands of spies operating within the country, then Wallfacers were assassinated on the streets of London. The British Empire is practically riddled with infiltration. If they keep infiltrating, there'll be nothing left to infiltrate. They might as well just change their name to ETO. They've completely lost all sense of shame.

Soon, the Red Bird 1, which was responsible for guarding the area in the sky, transmitted thermal images taken from high altitude. At the other end of the street, which had already been cleared, several red dots that looked like human figures were moving rapidly.

Upon seeing this, Carter immediately picked up the walkie-talkie and yelled.

"Damn it, open fire! Do I need to report this kind of thing to you? The people still around in this area, if they're not ETO members, are they here for Christmas?"

"Ta-ta-ta-ta!"

Upon receiving the order, the two escort aircraft unleashed a barrage of machine gun fire at the area scanned by the thermal imaging system. The bullets pierced through the walls, kicked up snow, and riddled the fast-moving red dots with holes.

"Red Bird reports: Target cleared, surrounding area is safe!"

"boom!"

The slap in the face came so quickly, right after Red Bird finished speaking.

Another violent explosion occurred. This time, the detonation point was inside a supermarket next to the convoy. Some soldiers who were unable to react were killed instantly. The shockwave from the explosion even caused the entire building to tilt.

"Where's the bomb disposal team? What are they doing? This bomb is about to explode in the Wallfacer's face! Bomb disposal team in front, check carefully! If this happens again, I'll shove a bomb up your ass!"

Inside the command vehicle, Colonel Carter was furious with these people. For years, the British Empire had been suppressed by the American Empire, resulting in a ridiculously low overall level of its military.

Compared to when I was going against art students back then, I'm far inferior now.

If they're still cutting military spending like this, are they planning to make the Royal Air Force, which never sets, become history like these ancient buildings?

"boom!"

A gunshot rang out from behind the convoy.

Colonel Carter was under immense stress, and upon hearing the sudden gunshot, he instantly became agitated.

"Who? Who fired the shot? Don't you know you can't fire without my orders?"

"Reporting, Colonel, it wasn't one of our men who fired the shot; it was Lin Xuan, the Wallfacer, who fired it himself!"

Colonel Carter: ? ? ?

Shock level from Colonel Carter +5.

Meanwhile, inside the car, Lin Xuan mounted the tripod used to hold the sniper rifle on the car door and frantically pulled the trigger at several points in front of her.

"Bang bang bang!"

Zhang Xiang, who was standing to the side, was stunned.

"This guy, he's not a Wallfacer, he's practically a special forces soldier."

Lin Xuan's firing rate was so high that she was practically using a sniper rifle like a semi-automatic rifle.

Moreover, every time he fired, it was as if he had activated an auto-aiming cheat, without needing to aim beforehand. From Zhang Xiang's perspective, every time Lin Xuan turned the gun, before the muzzle had even turned, his hand had already pulled the trigger.

The distance was too great for Zhang Xiang to know if Lin Xuan had actually hit anything, but judging from the gradually decreasing gunfire in the distance, it seemed that Lin Xuan was indeed wiping out the ETO members bit by bit.

A question arose in Zhang Xiang's mind.

"Does this guy really need me to protect him? Why do I always feel like he's the one protecting me? With this situation, it seems like everyone is busy, while I, the Wallfacer's bodyguard, am the most idle person."

You probably can't find another job in the whole world that's easier than Zhang Xiang's. He doesn't have to worry about anything; his own "Wallfacer" just picks up a gun and gets to work!

Zhang Xiang guessed correctly. Although Lin Xuan didn't use any cheats, the equipment he was equipped was practically the same as cheating.

While assembling the sniper rifle, Lin Xuan replaced the scope and redeemed a new item from the system.

Weakness Corrector: 500 Shock Points. When equipped, this device will scan all creatures within a one-kilometer radius and correct the shooter's ballistic trajectory, delivering a fatal blow to the enemy.

When this thing is mounted on a sniper rifle, it's practically like having X-ray vision and auto-aim. If it weren't for the severe overheating of the muzzle, Lin Xuan's firing speed could have been even faster.

Meanwhile, ETO's assassins were completely stunned by Lin Xuan's attack.

"Number Three, have you spotted the sniper's position?" An ETO assassin hiding in the building across the street felt a chill run down his spine as he watched his comrades being shot down one by one.

"Fuck, when did the British Empire get such terrifying snipers? They've probably killed more than twenty of our people already! Even movies wouldn't dare to depict something like this!"

"If it really comes down to it, let's retreat. Let Aristotle do this kind of work himself. We're assassins, not some damn suicide squad. If we keep fighting, the remaining assassins of ETO will be wiped out."

"Don't show your face. I'll report to my superiors now, bypassing Aristotle's authority and reporting directly to Qin Shi Huang."

Soon, the ETO assassins made contact with Qin Shi Huang.

The latter already knew about the situation in the British Isles from Zhizi.

At first, Qin Shi Huang also wanted to test what Lin Xuan was capable of.

Therefore, after consulting with the Lord, he allowed Aristotle to attempt the assassination.

The reply that followed nearly made Qin Shi Huang's jaw drop.

Lin Xuan, alone with a sniper rifle, successfully suppressed the firepower of more than thirty ETO assassins.

They reduced the number of ETO assassins lurking within the British Empire to single digits.

This was something that Qin Shi Huang couldn't understand at all.

At that moment, the Three-Body world contacted him on the screen beside him.

"Stop. There's no point in assassinating Lin Xuan. The technology he possesses has already surpassed the overall level of Earth's civilization."

"My Lord, what does this mean?"

Qin Shihuang was somewhat puzzled. The emperor had previously said that assassinating Lin Xuan was pointless, and he hadn't even arranged for someone to break through the barrier to do so.

Qin Shi Huang thought that the master did not give the assassination order to Lin Xuan because he felt that the fifth wallface was not a threat, but now it seems that there is another reason.

A short while later, a message from the Three-Body world appeared on the screen.

"He shouldn't be from your time."

"what?"

Shock level from Qin Shi Huang +5.

Qin Shi Huang had considered a million possibilities, but he never expected the answer would be like this.

"The technology that Lin Xuan, the Fifth Wallfacer, possesses cannot be found to have developed in the five thousand years of your human civilization. It's as if it appeared out of thin air. We previously suspected that this might be some technology that humans had hidden from us, but through the scanning of the Sophon, we found that it was simply impossible to achieve this."

"Therefore, after our unanimous discussion, we believe that he may have come from one of five other places tens of thousands of years ago, or even hundreds of trillions of years ago... No, we cannot tell you that."

As Qin Shi Huang looked at the text messages displayed on the screen, he felt as if his head was about to explode.

If he understands correctly, the Lord means that Lin Xuan may have been a person from hundreds of trillions of years ago.

Earth didn't exist back then, right?

How can this be?

Or does God know some secrets about Earth?

"As for this, we have no way of verifying it yet. It is very likely that other civilizations existed on Earth before human civilization, but we don't know why those civilizations did not leave any trace. Perhaps it was too long ago, but this is the most reasonable speculation we believe at present."

Qin Shi Huang understood somewhat.

"So, Lord, you gave up on assassinating Lin Xuan from the beginning because you believed he might not even be human?"

There was a moment of silence on the screen before it spoke.

"We cannot rule out this possibility, so more important than assassinating Lin Xuan is his stance. As it stands, his attitude towards the Trisolaran world and human civilization is almost the same, and he has not shown any obvious bias. If he does show a bias towards human civilization, we will reassess the danger of occupying Earth."

"Within our Trisolaran world, the Fifth Wallfacer, Lin Xuan, has a special name: we call him the Observer."

"[Observer]?"

"Yes, it depends on his position. He doesn't favor either side, he just quietly observes what happens. He's different from you, different from all of humanity. His task is simply... veto, but that can't be said."

“That’s not right. If that’s the case, his assassination value should be even higher. If Lin Xuan doesn’t die, he will become the biggest variable threatening your arrival on Earth.”

The screen fell silent again, and after a long while, three words appeared on the screen.

"It doesn't matter."

These three words completely baffled Qin Shi Huang. He didn't understand why Lin Xuan's threat was higher than Luo Ji's if what the master said was true.

Soon, the Three-Body world provided a reasonable explanation for Qin Shi Huang.

"Let me introduce you to a concept: the technology tree. It refers to the process of technological progress in the development of a civilization. For example, before you humans invented the steam train, the steam engine had already been created. This is a branch of the technology tree."

"The technology tree has two characteristics: first, it is hierarchical; second, products cannot be grafted onto it."

"What Lin Xuan possesses are products, which are like fruits on the technology tree. Grafting these fruits onto the technology tree of human civilization will be extremely difficult unless we can trace back to the manufacturing principle diagram of the product itself. Otherwise, the deciphering work alone will take up to a hundred years."

"There's still a possibility of deciphering it. As long as he hands over some technological products to humans for reverse engineering, there will always be a day when it's deciphered!"

"Yes, that's the second feature I want to talk about: the tech tree hierarchy."

"The technology tree is tiered, from level 1 to level 10. Even if a lower-level civilization deciphers the product, it cannot reverse engineer a high-level civilization's technology."

"For example, if we were to entrust an ancient civilization with the reverse engineering of a certain technological product that we have today, do you think it would be possible to decipher it?"

"The underlying theories of the two civilizations' technology trees are different, making reverse engineering extremely difficult. This is even the deciphering of a civilization with the same technology tree. The technology that Lin Xuan possesses is completely different from the direction of human technological development over the past five thousand years, making it almost impossible to decipher."

"When our First Fleet was traveling in space, it accidentally encountered the ruins of a Type 3 civilization that had been destroyed by cosmic turbulence. It contained a considerable amount of technology, and our scientists wanted to reverse engineer and decipher its products. Unfortunately, to this day, there has been no progress."

Qin Shi Huang nodded slightly. Although he was still a little confused, he understood the general meaning. No wonder the emperor let Lin Xuan go unchecked.

It seems that ignoring a civilization that doesn't take a stand, might threaten oneself but cannot destroy oneself, and whose technological development has completely stalled, is the best solution.

The most important point is something the Lord didn't actually say, but Qin Shi Huang already understands it.

That would be to assassinate Lin Xuan, which is something ETO simply cannot do with its current capabilities.

Soon, the ETO assassins received orders to terminate the assassination mission.

Aristotle bore the primary responsibility for the failed assassination attempt.

More than thirty assassins were killed one by one by the Wallfacer, leaving less than seven survivors. The target was not even scratched. This is a disgrace in the history of ETO assassinations.

In any case, Lin Xuan and the others finally managed to enter the city safely.

After switching to walking, Lin Xuan and Zhang Xiang were safely escorted to the British Museum by Colonel Carter.

After learning that Lin Xuan, the Fifth Wallfacer, had personally come to visit, Hines had already instructed the British military to invite Lin Xuan over.

However, considering Lin Xuan's previous actions towards Wallfacer Taylor, for safety reasons, the meeting place between the two was ultimately decided to be the British Museum.

This place is rarely visited, and it's quite far from Hines's laboratory. Even if Lin Xuan were to witness Hines taking any extreme actions, the British army would be able to react immediately.

Upon entering the British Museum, the profound historical atmosphere becomes even stronger.

Lin Xuan's gaze swept over the items in the display case, and she couldn't help but gasp.

"Good heavens, you might as well rename your museum the World Comic Exhibition. Not a single thing in these display cases is your own local artifact."

A quick glance reveals thousands of rare and precious artifacts from China alone, not counting historical relics left behind by other destroyed civilizations.

Zhang Xiang's lips twitched as well.

"Brother Lin, I suddenly thought of a joke."

"what?"

"Tell me about a person from the UK where the sun never sets, who made a vow to God to wipe out all Chinese-made products in their country, and then the UK Museum was opened to the public again."

Lin Xuan was speechless.

"Zhang Xiang, if you can't tell jokes, you can choose to shut up."

"Ok."

However, looking at so many Chinese cultural relics, Lin Xuan had some other thoughts in her mind.

"Maybe Zhang Xiang is right. Let's see if we can find a way to empty them all out. Anyway, all these things will eventually be taken away by Luo Ji and placed in the tomb of human civilization. I'll just consider it as keeping them safe for Luo Ji for a few days in advance. I believe the British Empire won't mind."