This door-opening had a huge impact on the people involved—whether standing outside the door or inside it, everyone was momentarily bewildered.

In fact, the handsome young man standing outside the door reacted even more dramatically. After a moment of shock, the expression on his face became quite fascinating, as if his life was flashing before his eyes. He was clearly lost in memories, and the memories were evidently not pleasant ones—rafters, copper-headed belts, spinning like a top, and heads inside alchemy furnaces, that sort of thing.

As the young man across the door fell into reminiscence, Yu Sheng on his side also started having life flashbacks.

The recalled scenes were quite similar to the other person's, except he saw them in third-person perspective.

Then the two of them simultaneously snapped out of it, retreating half a step backward with tacit understanding, seriously contemplating life and organizing their thoughts with the door between them.

Honestly, at that moment, Yu Sheng had the urge to close the door. Although he had considered various outrageous possibilities when "Wayward Disciple Four Thousand" mentioned sending someone for a visit, the situation of this "Senior Brother" showing up at his doorstep so early in the morning was somewhat beyond his psychological preparedness. However, this impulse lasted for just a second, after which he controlled the urge to close the door with an immense sense of responsibility, tenacious willpower, a frank attitude towards life, and a fearless disposition.

Mainly due to fearlessness.

But the subsequent development of events was clearly not what he had expected.

The handsome young man across the door finally understood (although it's unclear what exactly he understood), stepped back half a step again, and suddenly raised his hand in a salute, bowing deeply, rendering Yu Sheng stunned by his grand gesture—

"Junior, disciple Xuan Che under True Man Yuanling of Qianfeng Ling Mountain, greets... uh, greets the expert."

When mentioning Yu Sheng's title, he hesitated as if unsure how to address the person before him, ending up using the simple yet somewhat strange title of "expert."

Yu Sheng's reaction was even simpler—he was still dumbfounded.

Fortunately, there was someone next to him who reacted; Erin (probably Aou's one) saw the situation and stepped forward to poke Yu Sheng's calf, quietly mumbling, "Hey, hey, he doesn't seem to have any killing intent!"

"Oh, oh," Yu Sheng snapped back to his senses, thoughts spinning in his head, as he started responding, "Guest, right? Xuan Che, I heard your master mention that name. So... come in first, let's talk inside."

He then noticed two more people standing outside the door; they were the Special Service Bureau officers responsible for managing the courier station, currently watching the scene with curiosity and confusion. They seemed to feel that something was off about the atmosphere yet didn't dare to come forward to inquire. So Yu Sheng waved at them, "... Want to come in and sit for a while?"

One of the Special Service Bureau officers immediately waved his hand repeatedly, "Ah, no, no, we have things to do."

"Uh, right, our noodles are cooked..."

With that, the two Special Service Bureau officers ran off.

Erin poked Yu Sheng's calf again: "Is the Special Service Bureau withholding meal allowances or something? Why are these two always making instant noodles in their room?"

"How would I know!" Yu Sheng replied, continuing with a forced smile to invite the self-proclaimed "Xuan Che" handsome guy into the house.

The atmosphere throughout remained a bit eerie, but at least the guest was inside.

Then Yu Sheng realized that this "Xuan Che" appeared to be even more nervous than he was.

Xuan Che was indeed very nervous. From the moment he entered the house, he knew his cordial attitude earlier was the right approach.

An independent realm.

Through a seemingly ordinary door, the residence inside turned out to be a completely independent "Boundary Domain." His divine sense, which could usually cover mountains, forests, and cities, and penetrate through barriers and illusions, was directly cut off from the outside here. Even the spiritual energy he sensed seemed to operate independently just within this small abode—not to mention the strange aura lingering everywhere, with some doors looking close by but feeling as distant as the horizon when he closed his eyes. The hall appeared to be no more than a few steps away, yet for a fleeting moment, he felt as if he were standing in an endless expanse, surrounded by boundless emptiness.

Frankly speaking, the atmosphere here reminded him of the Exotic Realm, but the completeness and independence of this "Exotic Realm" had already reached an unusual level—and what made him even more uneasy were some deeper... peculiarities.

He faintly sensed that this visually visible "Cave Mansion" might not be everything here. What was before his eyes seemed to be merely an "antenna" of something much larger, evolved in front of his mortal eyes, with an even greater, unfathomable "structure" hidden right under his nose.

Suddenly, his master's voice advice before his departure echoed in his mind—

"Xuan Che, you have exceptional talent, but your cultivation level is shallow—do not listen or look around carelessly when at the expert's place."

He instantly jolted, observing the nose with closed mouth and introspecting within, withdrawing all his thoughts back, and becoming increasingly cautious.

Yu Sheng was placing two cans of cola taken from the fridge on the coffee table.

"I've only got this," Yu Sheng placed a can of cola in front of Xuan Che, his expression somewhat awkward right after, "Ah, for hosting a 'cultivator' like you, I should probably offer tea or something, right? Normally, you folks don't drink this kind of stuff..."

Before he finished speaking, he saw the young man in front of him say thank you and skillfully pull the tab and take a sip, showing an expression of enjoyment on his face.

"Master usually doesn't let us drink this much," Xuan Che adjusted himself and relaxed after seeing Yu Sheng's friendly demeanor, "He says this kind of stuff affects the alchemy dao."

Yu Sheng didn't immediately get it: "Drinking cola can affect ballistics?"

"It's alchemy dao," Xuan Che quickly explained, "It affects the preparation of pills. You can't drink it before entering the pill room."

Yu Sheng: "…Why?"

"Because it makes you burp," Xuan Che said seriously, "Key movements could be distorted—though in my opinion, it doesn't have much impact, but it's Master's teachings, so you have to listen when making pills."

Yu Sheng didn't expect such a practical reason, but suffice it to say, the atmosphere immediately felt more relaxed...

After things eased up, he finally dared to bring up some awkward "past incidents": "Cough cough, about that, sorry—last time with the alchemy furnace, there was a mishap on my end, I really didn't expect us to meet under these circumstances again..."

Before he finished, he saw the young man before him slightly twitch his face muscles.

It seemed like the aftermath of the copper-headed belt hadn't faded.

However, the other party adjusted his expression quickly: "You give me too much credit; someone like you must be acting for the greater good, so how could we youngsters hold it against you..."

His words only made Yu Sheng feel more awkward.

"You don't need to keep calling me youngster—I might not even be older than you," Yu Sheng tried to divert the topic, "Let's treat each other as equals, treat each other as equals..."

In fact, he felt like he was gaining an advantage, given that the person opposite was a cultivator, appearing to be in their twenties, but who knows how old they really are...

But the "young man" across from him was quite serious: "How could that be? You are friends with my master, so in your presence, I should treat you as an elder."

"Let's just talk casually—I'll call you Xuan Che, and you call me Yu Sheng," Yu Sheng quickly said, and without waiting for the other to react, he began to introduce, "This here is Erin, and the other one here is also Erin, there's one squatting on the windowsill and one lying on the TV stand, they're all Erins... They're all her 'clones.'"

Xuan Che had already noticed the pile of Erins in the living room but obviously hadn't dared to ask. Now he quickly greeted the little puppets politely, and just then, he heard footsteps coming down the stairs. Hu Li, yawning, descended from the second floor and was halfway down when she noticed a stranger in the house; her eyes widened slightly as she looked at Yu Sheng: "Savior, we have a guest?"

"Oh, it's a guest from Qianfeng Ling Mountain—the one who helped you investigate your background before from Qianfeng Ling Mountain, named Xuan Che, a disciple of True Man Yuanling," Yu Sheng introduced again upon getting up, "This is Hu Li, you should know her..."

"I know, I know," Xuan Che smiled and raised his hand to greet Hu Li, "Qianfeng Ling Mountain's Xuan Che greets the esteemed being from the Otherworld..."

"Why are you so polite with everyone?" Yu Sheng couldn't hold back, "Relax a bit."

Upon hearing this, Xuan Che couldn't help but give a helpless smile inwardly—what choice did he have? He couldn't see through anyone in this house! Even the mechanical puppets, which seemed less substantial than medicine jars, appeared as unfathomable cold black fogs in his divine sense, while Hu Li coming down the stairs was a blazing fire that couldn't even be gazed upon with divine sense, and as for Yu Sheng... this expert was even more baffling.

He simply couldn't "see" the person.

The eyes could see, but scanning with divine sense revealed a black hole, a human-shaped black hole, as if a chunk had been dug from the "world," standing there lifelessly, assuredly containing something, but what exactly couldn't be seen.

And this black hole continued talking and joking with him, telling him to relax.

Xuan Che once again suppressed his divine sense, trying not to "look" at the true nature behind these anthropomorphic beings, but to be honest, it wasn't easy—after all, as the most gifted young disciple of Qianfeng Ling Mountain for his generation, keeping his divine sense outward was a habit.

The only fortunate thing was that these "anthropomorphs" were indeed quite friendly.

Just as his master predicted before departure—

Anyone capable of confronting a Dark Angel and prevailing couldn't possibly be human.

But "they" were evidently on the side of "humans."

Truly fortunate.

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