The small courtyard where Xu Jin lives is located near the corner gate on the west side of Xingwangfu, and it is very convenient to enter and exit the palace at ordinary times.

Early this morning, according to Xu Jin's request, Erniu and Dabao brought bricks and stones to build a simple stove in the courtyard, then set up an iron pot, and got some dry firewood for the fire.

Everything was ready, Xu Jin and Xie Xiaowan were eating breakfast in the house, Zhu Houxi took Lu Bing and the accompanying eunuch Huang Jinxing to hurry over, and shouted in before they entered the house: "Sister Xiaowan, Xu Jin ......!" ”

Xu Jin didn't want to pay attention to this kid, but when he saw the two palace girls following Zhu Houxi, he couldn't help but be quite surprised, and hurriedly stood up and saluted: "Xu Jin has seen His Royal Highness the Prince and the two county lords!" ”

Xie Xiaowan also hurriedly stood up and bowed.

"Uh...... No need to be polite! Zhu Houxi waved his hand, and the county lord of Yongfu and the county lord of Yongchun behind him returned the salute, and the former's expression was obviously a little cowardly, and he lowered his head slightly and did not dare to look at Xu Jin.

Xu Jin glanced at Zhu Xiuning, the lord of Yongfu County, and couldn't help but be in a trance, and a description naturally appeared in his mind: when he is quiet, he is like a delicate flower shining on the water, and his action is like a weak willow supporting the wind. The heart is more than the dry, and the disease is like Xizi winning three points.

It is said that although Xu Jin saved the lord of Yongfu a few days ago, the latter was blocked by peanuts at that time, his face turned purple, his mouth was open, and he rolled his eyes, which was really not beautiful at all. And afterwards, Xu Jin didn't take a closer look in order to avoid suspicion, so he left in a hurry after chatting for a few words, and only then did he see the true face of the lord of Yongfu in the real sense.

Just imagine, even his younger brother Zhu Houxi looks so "demonic", and the county lord of Yongfu, as the sister of his mother's compatriots, can look so bad. There is no doubt that the lord of Yongfu can be regarded as the best little beauty in a million, whether it is the shape of the face or the weak temperament of the sick, it reminds Xu Jin of Lin Daiyu in the eighty-seventh version of "Dream of Red Mansions".

However, the beauty of the lord of Yongfu County is beautiful, but Xu Jin is really not interested in this kind of sick beauty, so he looked away after a glance.

At this time, Zhu Houxi unceremoniously reached out and took a meat bun from the plate, and said while eating: "Xu Jin, Yongfu and Yongchun heard that you are going to play tricks today, so they also want to come and see, no problem, right?" ”

Xu Jin smiled and said: "Naturally, there is no problem, strictly speaking, I am going to give His Royal Highness the Prince of the World a physics lesson today." ”

Zhu Houxi finished eating the meat bun in three or two bites, clapped his hands, and said with great interest: "Then what are you waiting for, let's start quickly." ”

"His Royal Highness, the two county lords, please come with me!" After Xu Jin finished speaking, he took everyone to the courtyard.

When he saw the big iron pot on the stove, the county lord of Yongfu couldn't help but glance at Xu Jin in surprise, and the little Lori Yongchun wrinkled her nose and said: "Xu Jin, do you want to make a big iron pot to stir-fry, the county lord doesn't want to see this, the county lord is here to do tricks." ”

Xu Jin smiled and said: "The county lord of Yongchun is a little restless, and I will perform a trick of washing my hands in an oil pot later." ”

Lord Yongchun's eyes lit up, and he clapped his hands excitedly: "Did you boil the oil, and then put your hand in the pot to wash it?" ”

Xu Jin nodded and said, "Exactly!" ”

The county lord of Yongfu suddenly lost his face, but Xie Xiaowan and Yue'er reacted calmly, because they had already witnessed Xu Jin's rehearsal a few days ago and knew the principle.

Zhu Houxi said suspiciously: "Xu Jin, you're not joking, are you?" Boiling hot oil is not trivial, and it can't be done without mana protection. ”

Lu Bing nodded and said: "Daochang Zhang in the mansion is a cultivator, he is profound, and he can make copper coins in a boiling oil pot. Could it be that Xu Gongzi, your Taoism can match that of Zhang Daochang? ”

Xu Jin's heart moved, and he asked, "Zhang Daochang performed in public to make copper coins in an oil pot?" ”

Zhu Houxi nodded in awe and said, "Daochang Zhang did perform in front of his father to catch copper coins in an oil pot, and Xiao Luzi and I were also present at that time, and I saw it with my own eyes. After the oil in the pot boiled, Zhang Daochang put a talisman on his arm, and then reached into the oil pot and scooped up two copper coins. Later, Zhang Daochang also threw a pig's trotter into the oil pot, and the pig's trotter was quickly fried to a golden brown. ”

Xu Jin sneered in his heart, the fart is magical, but he just used some tricks to fool him, and the truth in it is actually worthless.

Because Xingwang Zhu Youqi believed in Taoism, Zhu Houxi was exposed to Taoism since he was a child, and he also believed in Taoism, which was also the root of his future addiction to cultivation and alchemy. So Xu Jin has been thinking about what method to use to correct Zhu Houxi's concept during this time, so as not to lead him astray in the future.

It just so happened that a few days ago, the director of Yongfu County gave Xu Jin an opportunity, so Xu Jin planned to take advantage of this opportunity to strike while the iron was hot and give Zhu Houxi a physics lesson, so that he could realize that the so-called "supernatural powers" were all deceptive tricks. What Xu Jin didn't expect was that Zhang Daoren had also shown a similar "Taoism", which was exactly what he wanted.

At the moment, Xu Jin didn't talk nonsense, and immediately ordered Erniu to make a firewood.

Soon, the oil in the pot began to boil, and the boiling heat steamed up, which was quite scary to look at. Xu Jin took out two copper coins and threw them into the boiling oil pot, then rolled up his sleeves and calmly put his hand into the oil pot.

"Ahh Yongfu and Yongchun were so frightened that they covered their eyes and didn't dare to look, and Zhu Houxi and Lu Bing also turned pale and their eyelids trembled.

However, the expected screams did not sound, and Xu Jin easily scooped up the two copper coins in the bottom of the pot.

Yongfu and Yongchun removed the hand covering their eyes, and they were so shocked that their small mouths opened into an "O" shape, and they looked at Xu Jin's hand with an incredulous expression.

Zhu Houxi rubbed his eyes vigorously, stretched out his fingers and poked Xu Jin's arm lightly, confirming that it was not fried, and then said with palpitations: "Xu Jin, why wasn't your hand burned?" ”

Xu Jin threw the copper coin in his hand back into the oil pot and said with a smile: "Your Royal Highness, do you want to try it." ”

Huang Jin, the eunuch who accompanied him, immediately said sharply: "Master Xu, by all means, His Royal Highness the Prince is a daughter, how can he risk his life, if there is a mistake, you and I can't afford it." ”

Zhu Houxi glanced at the boiling oil in the pot, a trace of fear flashed in his eyes, and his face was hesitant.

Xu Jin was not reluctant, and said to Erniu who was burning the fire next to him: "Erniu, you come!" ”

"Yes, sir!" Er Niu Han stood up with a smile, put his hand into the oil pot, and scooped up the two copper coins in the pot in a good time, his arm was only slightly red, and he was also not burned, and hummed triumphantly: "Your Royal Highness, you are too timid, in fact, you are not hot at all." ”

Zhu Houxijun's face was slightly red, he was ridiculed by the big fool cow, he couldn't bear it!

"Silly cow, dare to underestimate this world, I'll touch it for you!" Zhu Houxi said and jerked his hand into the oil pot.

"Ahh Yongfu Yongchun exclaimed again, and the little eunuchs Huang Jin and Lu Bingjun were so frightened that their faces turned white.

"Huh...... It's really not too hot! Zhu Houxi reached into the tumbling oil, and was surprised to find that the boiling oil was really not very hot, and it was completely bearable.

Zhu Houxi retracted his hand and said in surprise: "Haha, it's really not hot, Xu Jin, what's going on?" ”

Xu Jin was about to explain, but when he saw the county lord of Yongchun rolling up his sleeves, he even wanted to reach out into the oil pot, so he hurriedly drank and said, "The county lord can't!" ”

Yongfu reacted at this time, and hurriedly pulled his sister away, Yongchun blinked his eyes, and said puzzledly: "Xu Jin, it's okay if the second brother touches it, why can't people touch it?" Could it be that you just passed on your mana to the second brother? ”

Xu Jin was a little amused and explained: "Because the oil hasn't boiled just now, but it's boiling now." After saying that, he beat an egg into the oil pan, only to hear a loud sound, and the egg was instantly scalded.

Zhu Houxi and the county lord of Yongfu both changed their faces greatly, and the little Lori Yongchun was even more frightened, and her little face turned white, and she took a few steps back.

Zhu Houxi ate and said: "Xu Jin, this ...... What's going on, it wasn't very hot when I touched it just now. ”

"It's simple, because rice vinegar is added to this pot of oil."

"Rice vinegar?" Zhu Houxi scratched the back of his head for some reason.

Xu Jin smiled and explained, "This is the physics lesson I gave you today. Density of rice vinegar...... Well, let's put it another way, rice vinegar is heavier than oil, and when the two are mixed together, the rice vinegar will sink to the bottom of the pot, and the oil will float on the top, so at first glance, you will think that it is all oil.

However, the boiling point of rice vinegar is much lower than that of oil, in other words, rice vinegar can be boiled at a very low temperature, turn into steam and float up, and the upper layer of oil is boiled, and it looks as if the oil has been boiled, but in fact, the oil has not been boiled. ”

The lord of Yongfu and the others seemed to understand it, Zhu Houxi listened to Xu Jin's lectures these days, and he already had a considerable foundation, so he understood as soon as he heard it, and suddenly said: "No wonder I smelled a smell of vinegar, and then the oil became hot, is it because the vinegar at the bottom of the pot was burned?" ”

Xu Jin couldn't help but secretly praise, this kid is still quite smart, he knows how to draw inferences, and nodded: "That's right!" ”

Zhu Houxi suddenly became interested, and immediately asked Erniu to pour out the hot oil in the pot, and then personally added rice vinegar and oil to try it once, and found that it was really as Xu Jin said, he couldn't help but dance excitedly, and laughed: "I see, haha, in the future, this son can also use this trick to scare people." ”

Xu Jin said quietly: "How about I make another trick for His Royal Highness the Prince?" ”

"Hurry up." Zhu Houxi urged happily when he heard this.

Xu Jin turned around and walked back to the house, and everyone hurriedly followed. Xu Jin instructed Yue'er to bring up a basin of brine that had been prepared and put it on the table.

Xu Jin took a bamboo chopstick, soaked the bamboo chopsticks first, and then slowly inserted it into the water under the head, and slowly let go of his hand after it was stable, and the bamboo chopsticks were magically erected in the water.

This trick is the most common trick of the folk witch stick - vertical chopsticks in the water. For example, if a person has a headache and goes to the goddess for treatment, the goddess will say that he has hit an evil spirit, and then try to erect chopsticks in the water, while calling the name of the ancestor in the patient's family, when the name of an ancestor is called, the chopsticks are just erected, that is the ghost of the ancestor is haunting, so the goddess will raise the kitchen knife and shout to scare the evil spirit away, and the chopsticks will fall down immediately.

If this trick "vertical chopsticks in the water" is combined with a vivid performance, it is indeed easy to frighten the audience, but it is actually just a simple mechanical phenomenon, as long as a little practice, anyone can do it.

"Xu Jin, what's going on? Teach me! Zhu Houxi looked at the chopsticks standing straight in the water, and said with great interest.

Xu Jin explained with a smile: "This is actually simpler, because after the bamboo chopsticks are stained with water, the surface is sticky, and the side is supported by water. His Royal Highness the Prince can try it! ”

Zhu Houxi tried several times according to Xu Jin's instructions, and finally succeeded in putting the chopsticks up for the fifth time. Xie Xiaowan watched it interestingly, and also tried it, and succeeded in three times.

Seeing this, the county lord of Yongchun also shouted to try, and the little Lori was obviously very lucky, and she succeeded twice, and she was so excited that she screamed and jumped. In the end, the county lord of Yongfu couldn't help but try, and he succeeded after the same three times, and couldn't help but glance at Xu Jin in surprise.

Xu Jin smiled: "Therefore, all phenomena in the world have their truth, and when you don't understand the truth, you will feel very amazing and incredible." But when you understand the truth, then there is no mystery at all, and the so-called Taoist supernatural powers are just blind eyes. ”

The county lord of Yongfu lowered his head thoughtfully, obviously savoring Xu Jin's words.

Zhu Houxi also fell into contemplation, and his face gradually became unnatural, since fishing for copper coins in the oil pot is just a trick to deceive people, isn't the so-called Dao magic power of Daoist Zhang fake, in other words, isn't the so-called elixir he refined also a useless fake medicine? No wonder my father ate so many of his pills, he didn't even use his fart, and his father died young when he was only in his forties, could it be because of ......

The more Zhu Houxi thought about it, the more ugly his face became, and he said in a deep voice: "Sister, don't take Zhang Daoren's pill in the future!" ”

The county lord of Yongfu nodded silently, but his eyes quickly swept a glance at Xu Jin, although she was not in good health, she was a clever and intelligent girl, at this time she finally understood the reason why Xu Jin gave his brother this so-called physics lesson today.

Xu Jin smiled indifferently in his heart, as the so-called hearing is false, seeing is believing, some things, you say a thousand sentences and ten thousand sentences to explain, it is not as convincing as a personal practice.

Obviously, his hard work in today's physics class was not in vain, and Zhu Houxi had already realized that the so-called Taoist magic power was a lie.

Of course, it is not so easy to completely reverse the concept that a person has formed since childhood, and it can be seen that this kid still has "illusions" about cultivation because Zhu Houxi did not immediately order someone to drive Zhang Daochang away.

However, Xu Jin is not in a hurry, everything is not achieved overnight, continuous quantitative changes will lead to qualitative changes, Zhu Houxi has doubts about cultivation now, just like taking a preventive shot, having antibodies, it is estimated that he will not indulge in it in the future.