My hotel is full of emperors throughout history.

An eerie silence fell over the room.

Professor Wang adjusted his glasses, leaned closer, and muttered to himself.

"This...the spacing of the transverse ribs, the direction of the longitudinal ribs...and the overall regularity..."

"Hiss... You know what, Old Li, putting all other factors aside, just looking at the design, this thing..."

He didn't finish his sentence, but his meaning was clear.

The metallurgical expert, known as Old Li, swallowed hard, staring intently at the familiar yet unfamiliar elemental peaks on the spectrometer screen, his voice hoarse.

"Carbon equivalent... yield strength estimation... these performance parameters, if applied to modern times, would be the standard HRB400... but this patina, this soil environment..."

"Absurd! Utterly absurd!"

Professor Sun, who was in charge of dating, shook his head violently, as if trying to shake off some disrespectful idea.

"The carbon-14 dating results for the surrounding charcoal and textiles are crystal clear—it's from the Zhenguan era!"

"The stratigraphy is also absolutely correct!"

A professor spoke up.

But the more they did this, the more confused they became.

Finally, one of the professors couldn't help but speak up.

"Are we really going to believe that, 1,400 years ago in the Tang Dynasty, there was already a complete industrial system capable of rolling out standard rebar?!"

"This is even more outrageous than immortal iron!"

"But Lao Sun, you have to admit, this thing...it really does look like it!"

Professor Wang pointed at the rebar, his fingers trembling slightly.

"It's so realistic it's chilling! If it weren't for this location, if it weren't for this stratum where it was unearthed, I would never have associated it with the Tang Dynasty, but the reality is right here!"

Another cultural relic restoration expert, who had been silent until now, cautiously spoke up.

"Could it be... some kind of exquisite ancient technique that coincidentally achieved a similar effect?"

"After all, the universe is vast and full of wonders. It's not entirely impossible that the ancients occasionally had a flash of inspiration and created something that transcended their time..."

"Could a single flash of inspiration reveal the entire steel rolling process and alloy proportions?"

Expert Li immediately refuted this.

"This requires a system! A complete industrial foundation! This can't be handcrafted by a single genius craftsman!"

An expert looked at the rebar and speculated.

"Could it be... that someone sent this thing to the Tang Dynasty?"

As soon as he finished speaking, all the professors looked at him as if he were an idiot.

"Why don't you mention that Emperor Taizong of Tang also traveled to the modern era?"

"Did you think this was a novel?"

"We're all senior professors; how can we say such unrealistic things?"

"Exactly! We're all staunch materialists, so stop saying things that are out of touch with reality!"

"Instead of saying that, you might as well say they were sent there by aliens!"

"Yes! Compared to what you said, I still believe more the story of a powerful figure from the Zhenguan era who single-handedly fought his way to victory!"

"Then you guys need to explain what this thing is all about?"

"It can't possibly be..."

The professors argued back and forth, each offering their own opinion.

Sometimes he quotes classical texts, sometimes he invokes modern science, and sometimes he falls into a silent daze staring at the rebar.

Watching these academic giants argue as if they were questioning the meaning of life, Xiaolin felt a mix of emotions.

In the end, none of the professors could win the argument.

"Who cares! Let's post it and let others see!"

Therefore, when the final report on carbon-14 dating and other auxiliary dating techniques, as well as the story of the Zhenguan Divine Iron, were released.

The news exploded like a nuclear bomb in the archaeological community.

"impossible!!"

Professor Luo from Peking University was the first to receive the report. His hands trembled so much that he could barely hold the few thin sheets of paper. His face was deathly pale, and he kept muttering to himself.

"During the Zhenguan era... the error could not have exceeded twenty years... How... how is this possible?!"

Academic chat groups have gone completely crazy.

"Old Zhang! Have you seen the report?! The carbon-14 results for that divine iron!"

"I've seen it... I... I need some peace and quiet..."

"This isn't just overturning history, it's overturning our fundamental understanding! How could the Tang Dynasty have possessed such a level of industrial capability?!"

"Could the 'Iron Remnants from the Celestial Realm' mentioned in the 'Veritable Records of Emperor Taizong'... be real?!"

"Bullshit Celestial Realm! We're materialists! But... but how do you explain this?!"

"If the Tang Dynasty could mass-produce steel of this specification... then what were we doing during the Song, Yuan, Ming, and Qing Dynasties? What was the point of our research on ancient metallurgical history?"

An archaeological expert looked at the report, then at the rebar, clutching his head as if he wanted to rip out the little hair he had left.

"This formula, this performance, this perfectly formed thread... Without electricity, without a blast furnace, without a rolling mill, how did they manage to do it?!"

"Could there really be a lost ancient civilization? Or... aliens?"

Even the most meticulous and conservative old professor was speechless at this moment, only looking repeatedly at the test report and the iron bar, as if trying to find something interesting in them.

Finally, the official academic report on the "Zhenguan Divine Iron" was released amidst extreme caution and numerous controversies.

In the report, experts had to acknowledge the authenticity of its date.

However, its cause can only be vaguely described as "reflecting some unknown, highly developed metal processing technique in the Tang Dynasty, the specific technical origin of which still needs further research", and it is given an academic name - "Tang Dynasty patterned high-carbon steel component".

If there weren't examples here.

It's hard to imagine how Tang Dynasty and later high-carbon steel components with regular patterns were connected.

As for why it is so similar to modern rebar.

It has become an eternal mystery in the fields of archaeology, history, and science, sparking countless speculations and debates.

People from the National Museum also arrived, and when they saw the rebar, they fell silent.

"Are you sure this was unearthed from Zhaoling Mausoleum, and not stolen from some construction site?"

But after a series of tests, they all fell silent.

The culprit, the rebar, was placed in the most prominent display case of the National Museum, enjoying national treasure-level treatment, as indicated on the label.

【Tang Dynasty "Zhenguan Divine Iron" (high-carbon steel component with regular patterns)】

This artifact testifies to the extremely high level of craftsmanship in the Tang Dynasty. Its origin and the techniques used to create it remain a mystery, making it an important physical object for studying Tang Dynasty science and technology and ideas.

In the ninth year of the Zhenguan era, the emperor established…