"After the duel of magic, take out the yellow paper, and say that the demon has already been sealed onto it. Then, when it is ignited, various shapes of demons can be seen."

The operation Xu Yun described was actually a very common 'exorcism' method during the Ming Dynasty.

Because according to technological development, the core material needed for the entire process... that is, potassium nitrate solution, would only start to become relatively common by then.

Of course.

Back then, Daoists didn't call it potassium nitrate solution; they called it yellow nitrate water.

The Song Dynasty hasn't developed to this point yet, but Xu Yun had already produced potassium nitrate while preparing the salt bridge and nickel steel,

with the help of this super-dimensional solution, it's extremely easy to feign the mysterious, and ensures that no anomalies are discovered.

As for Old Su's mention of retrieving items from boiling oil and burning ghost corpses...

In simple terms, it's quite straightforward.

The so-called burning of ghost corpses is actually a very "masochistic" performance:

The spellcaster gestures wildly, muttering incantations.

After a while, his fingers surprisingly begin to burn.

The spellcaster then takes a mouthful of water and sprays it onto the 'already beheaded' but unseen demon corpse on the ground and his own burning fingers.

In an instant, flames rise from the ground.

If conditions are right, you can even see wisps of ghost fire.

In reality.

This occurs because the spellcaster previously placed camphor powder, phosphorus, and sulfur on the ground.

During the performance.

The spellcaster first smears these on his fingers.

Because sulfur and phosphorus are flammable, and camphor is volatile,

they ignite upon contact without harming the fingers.

At the same time, what the spellcaster sprays from his mouth is not water, but alcohol,

thus creating a burst of flame, fully burning the demon corpse.

This is also a trick that appeared only in the Ming Dynasty. Compared to the original version, which might be exposed due to the 'alcohol smell,' Xu Yun provided medical alcohol.

Even though medical alcohol has a distinct smell, it's generally significantly different from regular alcohol.

If someone really inquires, it can be attributed to the demon-subjugating water from the 'blessing,' as a patch for the flaw.

As for retrieving items from boiling oil, it's unnecessary to explain further.

This should be a widely known little trick, quite popular even during the Qigong craze of the 90s.

However, let's correct a common misconception:

Many people believe that retrieving items from boiling oil involves placing vinegar under the pot, with oil on top, as vinegar has a low boiling point, moving upward when heated, thus appearing indistinguishable from oil.

But this is actually incorrect.

The boiling point of acetic acid is 118 degrees. Due to the water mixed in cooking vinegar forming compounds, it causes azeotropy, and its boiling point is definitely not 40 degrees as claimed.

The notion that vinegar's boiling point is only 40 degrees and the temperature is just 35 degrees when hands are put in the pot is a baseless rumor.

In reality.

The reason for this seemingly boiling oil, but actually low-temperature phenomenon.

Is due to substances like calcium carbonate and boric acid placed under the oil pot, which generate gases when heated, creating a false boiling effect.

So if any unfortunate transmigrator attempts this, remember not to add vinegar to the pot's bottom.

Otherwise, it'd be like Meledi watching a naughty movie while taking pills—a recipe for even greater amusement.

In summary.

These little tricks, seemingly incredibly simple to the latter-day observer, could easily deceive countless people in the Northern Song... or any ancient feudal dynasty.

Additionally, since Emperor Huizong was quite an easy-going emperor, it's no surprise to Xu Yun that Guo Jing succeeded in front of him.

Then Old Su suddenly thought of something and asked:

"But Xiaowang, I heard that other than subduing demons, Master can also predict the past and the present, grasping the forces of heaven and earth. How is this done?"

Xu Yun awkwardly scratched his head and pointed at himself:

"To be honest with you, the so-called all-seeing and all-knowing ability of Master..."

"Is nothing more than a small person like me calculating and determining the timing of the comet and Lu Dong earthquake, which Master Guo 'predicted'."

Old Su was taken aback by this, then memories of Xu Yun preparing in front of the telescope flashed in his mind, and he suddenly realized:

"So that's why you waited for over a dozen days before starting observations after making the lenses?"

"I thought the comet was merely a coincidental stroke of luck..."

"But... are such celestial phenomena and earthquakes really calculable by humans?"

Xu Yun's mouth twitched a few times:

"...Of course they can."

After he said that.

He silently added two words in his heart:

No way.

Not to mention the Song Dynasty, even in later times, comets and earthquakes are incredibly difficult to predict.

Comets are somewhat easier to discuss.

An astronomical object about 100 kilometers in size, approaching the sun and approximately 50 astronomical units from Earth, has a chance to be detected by infrared telescopes.

When it's about 28 astronomical units from Earth, there's a high probability it can be detected by the Hubble Space Telescope based on its color.

The speed of such interstellar objects relative to the sun is usually within 40 kilometers per second, which is quite slow compared to the distance.

Therefore, with the help of supercomputers calculating for several years, there is a fair chance to accurately determine a time when it can be observed with the naked eye.

But earthquakes are a different story entirely.

Even in the 21st century, no country can predict earthquakes with 100% accuracy.

At most, after an earthquake occurs at the epicenter, leveraging the fact that electromagnetic waves travel faster than seismic waves, people further away can be prepared in advance.

Even this is only in its infancy stage, with practical results mediocre, and the promotional significance exceeding actual value.

Xu Yun remembered these two incidents purely because he was a transmigrator:

The comet because it coincided with Cai Boyi's death, remembered from his childhood.

The earthquake was because it happened right on the Mid-Autumn Festival, not a day off.

Additionally, it was the year Emperor Huizong ascended the throne, making it unforgettable.

But according to the original timeline.

At this time, Empress Dowager Xiang had not died, so Zhao Ji only exempted Lu Dong from its annual tribute, thus smoothly averting the entire situation.

This is one of the core reasons why Guo Jing was willing to listen to Xu Yun after he came into power:

The way Emperor Huizong and court officials viewed him was the same way he viewed Xu Yun.

If initially, Guo Jing complied only under pressure, after a few predictions came true, he genuinely regarded Xu Yun as an immortal.

Unfortunately, Old Su didn't realize he had been fooled by Xu Yun—in fact, combining Xu Yun's earlier performance, Old Su believed this explanation by eighty to ninety percent.

Thinking of this.

A strong sense of bewilderment emerged in his eyes:

"Xiaowang, if you can ensure Uncle Wen and Qingzhao's safety, why go through all this trouble?"

.....

Postscript:

Have any readers just discovered our book in the last day or two? Could you tell us where you found it? Our bookmarks have strangely surged these past days...

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