A new question: how could someone as weak as Paris kill an expert like Tennyson?

Following the direction of the Nightless Sky Fire Apricot, Lin Yu also took a look...

It was indeed a very simple transmission structure designed with gears and hinges, without any alchemical devices involved.

The design of this Hidden Door could be replicated directly in his Real World.

This is indeed a place that Nightless Sky Fire Apricot —after all, most of the "searches" in the City That Never Sleeps are actually about capturing Alchemy Energy fluctuations at different frequencies.

Especially since Supervisor Tennyson is an expert in alchemy, and this is his private Alchemy Laboratory...

The way Nightless Sky Fire Apricot searched this place must have been by using Alchemy Energy perception.

Who would have thought that Supervisor Tennyson would transform this hidden structure into a purely physical mechanical device devoid of any Alchemy intervention?

But...

Lin Yu's curiosity was also piqued.

"It's understandable that they couldn't detect this place using Alchemy Energy sensing, since Supervisor Tennyson's design was indeed aimed at Alchemy search methods in the 'Barren Realm'..."

"But why couldn't either Old Zheng or I sense it with our Mental Power...?"

Lin Yu asked, and Stiller, who had been silent, gave his answer.

"Boss, it's because of the 'Silence Material' —the construction of this door, although it didn't involve Alchemy, didn't generate Alchemy Energy, and didn't react with Alchemy Energy... all the materials used in its construction are actually a special kind of 'Alchemical Materials'."

"This is a material that has undergone special treatment after all the Living Alchemy Energy has been extracted, making it absolutely stable. Based on my deduction after traveling through various worlds and witnessing the Supernatural System of Other Worlds, this 'Silence Material' is very likely to not react with the extraordinary abilities of other worlds."

"Of course... a large area of 'silent' noise is still quite noticeable in perception, and materials that don't react with other energy are also very conspicuous—but Supervisor Tennyson's ingenuity lies in the fact that the entrance to this Hidden Door is concealed within the 'Isolation Layer.'"

"There are strict regulations for setting up private Alchemy Laboratory in residential areas. They must have an 'Isolation Layer' to prevent the leakage of Alchemy Energy and dedicated pipelines for 'Waste and Waste Energy Discharge'."

"Supervisor Tennyson chose to use 'Silence Material' to build this Isolation Layer, which perfectly concealed the entire Hidden Door at the energy perception level."

Stiller offered his analysis.

Nightless Sky Fire Apricot looked at Stiller, also pleasantly surprised. "Wow, this Artificial Humans truly lives up to his reputation as a talent from the former Security Department; he knows quite a lot about Alchemy too..."

As she spoke, Nightless Sky Fire Apricot looked at Lin Yu, thought for a moment, and said, "I'll add a 'Captain' — Captain and Pipi, two for two."

Nightless Sky Fire Apricot gestured with two fingers on each hand, repeatedly crossing and shaking them, seemingly indicating the process of "exchanging".

Lin Yu said helplessly, "I've already said it, our world doesn't have this custom or tradition."

Nightless Sky Fire Apricot nodded. "I know... I was just kidding."

Then, she paused for a moment and added, "Ah, but Arthur... isn't this Artificial Humans considered a citizen of our City That Never Sleeps? Since he's from our world, your world's Rule don't apply to him—could he be sold separately?"

Nightless Sky Fire Apricot said with a smile, and Lin Yu declined again.

"In my view, he also has his own independent will, regardless of which world he comes from..."

However, Lin Yu did see through it.

Nightless Sky Fire Apricot really intending to buy Old Zheng and Stiller's products; she's mostly joking around.

This may also be her way of expressing her approval and affection for Old Zheng and Stiller.

Therefore, Lin Yu didn't pay much attention to it and just looked at Stiller.

"Anyway... Stiller, let me ask Supervisor Tennyson this: based on your experience in the Security Department, how many people in the City That Never Sleeps do this kind of design, where Hidden Door are created using Isolation Layer of Silence Material?"

Stiller shook his head. "It's not a matter of quantity, this is the only one I've seen so far. Boss... to be honest, this design is quite difficult to do; it must be Supervisor Tennyson's own idea."

"Even if someone had thought of this idea before... it's still very difficult to create a reliable, almost seamless Hidden Door from Silence Material within a limited thickness, without the aid of any alchemical devices."

Stiller spoke, Lin Yu showed a thoughtful expression.

"I see... So, in that case, Supervisor Tennyson is not only quite skilled in Alchemy, but also seems to be a rather thoughtful type?"

Seeing Lin Yu's expression, Old Zheng asked, "Boss, what's on your mind?"

Lin Yu nodded.

"Hmm... I'm thinking, there's a new mystery surrounding the Murder Case involving Paris."

"Although he didn't actually kill Supervisor Tennyson out of his own will, but rather under conditions where his cognition and will were interfered with... but, given the extent of President Paris's modifications and his combat skills under 'cognition interference,' could he really have killed Supervisor Tennyson in such a short time?"

"Especially since the second son of the Duke Rainbowlight is nearby—and if Paris is even slightly slower, the spread of the commotion will alert the security personnel to the fighting taking place here, allowing them to subdue Paris beforehand."

As Lin Yu spoke, he thought of Paris's past combat strength... Although Paris was indeed considered a "good fighter," after all, in the City That Never Sleeps, as long as one was willing to invest in advanced modifications and top-notch implanted Alchemy Component, their Combat Power strength would not be too bad.

But the problem is...

Paris is definitely not a top-tier fighter.

He may be lacking in combat ability compared to Joe Solence.

And the Supervisor Tennyson in front of us has shown more and more evidence that his "combat capabilities" may be quite high.

His extremely disciplined lifestyle means he is likely to always be in "peak condition," and the "war wounds" that can only be left from frontline combat also demonstrate his "rich combat experience."

In addition, his familiarity with the properties of Alchemical Materials, his superb alchemical skills, and the design of this Hidden Door...

Lin Yu imagined it for a moment, and even if this guy were his hypothetical "assassination target," he felt that Supervisor Tennyson wouldn't be easy to kill.

How could someone like that be "accidentally killed" by Paris?

"Stiller, you were once the Head of Security for President Paris," Lin Yu cautiously looked at Stiller again, "In your opinion, if President Paris and Supervisor Tennyson were to fight to the death, who would have a better chance of winning?"

Lin Yu asked, Stiller answered seriously.

"Most of them are Supervisor Tennyson... President Paris's Alchemy Component and modifications are mostly focused on 'survival,' with a lot of functionality and defense, and the offensive capabilities are quite lacking and limited."

"While it might be difficult for Supervisor Tennyson to truly threaten President Paris's life immediately, it would certainly not be an easy task for Paris to kill Tennyson in a short time—so, boss, it seems there are still some ulterior motives we don't know about in that case!"

Stiller, halfway through his sentence, already understood what Lin Yu meant by asking this question.

Nightless Sky Fire Apricot, with her arms crossed, nodded as well. "Yeah, I knew it... I've always felt that perhaps it wasn't just 'President Paris' who was acting strangely back then; the two deceased, Supervisor Tennyson, and Rainbow Light Second Son also seemed a bit off."

"Fortunately, I trust my intuition—I've already sent the great Detective 'Sherlock' to gather evidence. Once we've searched the area, he should be able to glean a lot of information from the scene."

Upon hearing what Nightless Sky Fire Apricot, Lin Yu looked at her in surprise. "What? You were sent to the scene by 'Sherlock'?"

"I thought you left him at the Nightless Sky Family... No, he should be there right now."

Since Fu Luo is currently in the form of Information Lifeform, Lin Yu can pinpoint Fu Luo's approximate location by using his Mental Power Network.

Fu Luo's current location is indeed inside the Nightless Sky Family.

Nightless Sky Fire Apricot waved her hand. "Of course, we'll have the Servant collect evidence remotely for him. I'm not stupid— 'Sherlock' is a 'dead man' on your side. You brought a lot of 'companions' with you this time, so we definitely can't let him act alone or show up. What if he's directly witnessed?"

"Don't worry, I wouldn't make such a basic Error!"

Nightless Sky Fire Apricot said earnestly.

Lin Yu nodded. "Indeed, if he's at the Nightless Sky Family, he should be absolutely 'safe'... I can rest assured now."

"In short, regarding the suspicious circumstances surrounding Supervisor Tennyson's murder, I think we can wait for the great Detective's on-site investigation findings," said Nightless Sky Fire Apricot eagerly. "As for the mystery surrounding his involvement in this incident—the 'motive' or 'cause'—that's up to us to unravel!"

Nightless Sky Fire Apricot pointed to the space behind the Hidden Door, where the light from the lighting equipment fell.

And what appears in the space behind that Hidden Door after it is illuminated...

It's another Daoist Sect.

The door was locked.

Nightless Sky Fire Apricot walked up to the door, glanced at it confidently, bent down and fiddled with the keyhole, then looked at Lin Yu.

"Ha, it won't open!"

"This is also a mechanical lock, without any alchemical mechanisms... and the most complex type at that. I have absolutely no way of opening it."

"If we were to resort to violence... that probably wouldn't be a good idea either—after all, this place is still 'sealed off,' and there are still security personnel on duty outside."

Lin Yu nodded calmly upon hearing Nightless Sky Fire Apricot.

"That's easy..."

"I have 'professionals' here."

As he spoke, Lin Yu snapped his fingers.

Behind him, a new figure appeared.