Liu Tan took a deep breath and said, "This has nothing to do with magic. If this is also magic, then everything Father uses every day must also have magic."
Liu Che was a little surprised: "Oh? Tell me about it."
Liu Tan pointed to the palace lantern next to him and said, "This is the same principle as the toilet."
Thanks to the wise ancient people, his journey to popularize science was not so difficult.
In fact, people had already consciously used the siphon principle during the Han Dynasty. Everyone knew that it was possible to do so, but no rules had been summarized for dissemination.
However, due to the lack of a scientific and technological system, most people do not learn these things during their education. As a result, this principle is actually used in daily life, but it cannot be connected in a different form.
While Liu Tan instructed Miao Rui to cut a cross section of the unfinished toilet in the palace, he walked over to the palace lantern and said, "I call this the siphon principle. The palace lantern also utilizes this principle. The copper tubes on either side are siphon tubes, which also serve as smoke guides. Water is stored underneath. When smoke is generated, it's high enough, while the smoke guides are lower, creating a siphon effect. The smoke flows through the smoke guides and into the bottom, where the water dissipates it."
While Liu Tan was wondering whether he should explain the principles of gravity, Liu Che asked, "So they are the same?"
The toilet Liu Tan had been using for demonstration had just been delivered. Because it was a cross-section, it was easier to see. Liu Tan pointed at the toilet pipes and asked, "Don't you see they're the same?"
Liu Che looked at it and said, "How is it the same?"
Liu Tan patiently explained, "It's like the connection point below is the water reservoir for the palace lantern, and this is the smoke pipe. Because the toilet requires greater suction, the pipe is designed like this."
Liu Che felt a little regretful: "So it's not a magic trick."
Liu Tanxin was so exhausted that he almost collapsed on the toilet. "If it really is a magical technique, how could it be so easily revealed in the world?"
There is no need to say things like there are no magical arts or immortals in this world, because even if you say it, Liu Che may not believe it, or if he says it, everyone will just think he is lying.
It would be better to just elevate it infinitely. If Liu Che could realize that immortals and magic were unattainable, and even the emperor couldn't even think about it, maybe things would be much better.
Liu Che believed what Liu Tan said. He said with some melancholy, "That's true. Otherwise, why have we only heard of the immortals for so many years but never seen them?"
Liu Tan whispered, "The immortals they saw might not be real. They might have mistaken them. Even my father hasn't seen one, so how could they possibly have the right to see one? In the world, who can compare to my father in terms of luck?"
Liu Che's attention was drawn to her and he asked, "You mean, if I can't see it, then no one else in the world can see it?"
Liu Tan nodded seriously: "Yes, sometimes the fairyland or immortals they see may not be real. Even if they do see them, they may be relics from the past."
Liu Che was obviously more interested in theology than science, so he asked, "What does it mean to leave behind the past?"
Liu Tan made up a story: "The so-called relics of the past mean that an immortal once appeared here, but when someone saw him, he or that place was no longer there. As the saying goes, a day in heaven is a year on earth..."
"Wait, a day in heaven is a year on earth?" Liu Che's eyes widened. "Where did this saying come from?"
Liu Tan: ...
Damn, I let it slip.
Alas, the mythological system of the Flower Growers is really too complicated, and its evolution is also very complicated. Sometimes we have no idea when some familiar things evolved.
Liu Tan had also read a paper on the ancient mythology system, but it had been so long that he had almost forgotten it.
Now he thought everyone knew about this, but to Liu Che it was the first time he heard of it.
Liu Tan paused briefly, thinking about how to smooth things over. However, before he could come up with a plan, Liu Che had already automatically skipped the topic: "Well, there's no need to say more about this matter. Please continue."
Liu Che had already automatically thought to himself: If his son doesn’t say it, it means he can’t say it.
Anyway, he just remembered this sentence and there was no need for Liu Tan to explain anything.
But Liu Tan was worried after hearing what he said, and couldn't help but say, "This... there are also sporadic records..."
Liu Che nodded perfunctorily: "Yes, I understand."
Liu Tan struggled in vain and just whispered, "I forgot what I was going to say."
Liu Che: ????
Bu Fan, who was standing by, reminded him in time: "Your Highness said that one day in heaven is equal to one year on earth."
Liu Tan tilted his head and thought for a moment. "Oh, that's right. Because time is not equal, and immortals rarely stay in one place for too long except in their own caves. So when someone sees them, it's just a remnant of time..."
Liu Tan was a little stuck when he said this. He suddenly realized that he had been talking too much nonsense. The concept of time preservation...how should he explain it?
Fortunately, Liu Che never asked too many questions, he paid more attention to the answers.
After hearing what Liu Tan said, his brows relaxed and he said, "If so, no wonder I never saw the immortal when I went to Penglai to seek him. I guess the immortal is no longer there."
Liu Che then asked casually, "Where do immortals usually go? Do they prefer mountains or the sea? If we build a high platform, will we be able to see them?"
Liu Tan glanced at Liu Che, and the villain in his heart rolled up his sleeves. Since he had already been fooled, he might as well fool him to the end.
"The immortals' destinations are not fixed, and the things everyone likes are not fixed either. The high platform... no matter how high it is, it can't be higher than the stars in the sky, so it can't be seen."
"Stars?" Liu Che was a little confused: "Aren't those stars the immortals themselves?"
Liu Tan said, "That's fine, since they live upstairs anyway."
Liu Che was quite excited: "What is it like on the stars?"
Liu Tan said, "They are all different. Some are covered with ice for thousands of miles, some are covered with red earth, and some are covered with flames of all kinds."
Liu Che was a little surprised: "How can we live here?"
Shouldn't the place where immortals live be one with eternal spring, birds singing and flowers blooming all year round?
Liu Tan said, "An immortal's cave isn't just for living. Immortals also cultivate and see the wider world, so they'll look for places to hone themselves. However, immortals generally don't have just one cave. A cultivation cave usually doesn't have a good environment, but one used for entertainment can be very beautiful."
"What do those caves look like?"
Liu Tan racked his brains: "The roads are wide and clean, and the buildings are towering into the sky. At night, lights of various shapes and colors will light up on those buildings and along the roads. Some crowded places will be very lively..."
As he spoke, Liu Tan became a little absent-minded. After traveling through time for so long, he thought he had adapted to the life here.
However, when he talked about it, he found that he missed her a little.
He stopped talking and Liu Che didn't urge him. The nostalgia on Liu Tan's face was obvious. Liu Che suddenly regretted asking too many questions. What if Liu Tan couldn't bear the longing and left?
Liu Tan's distraction was only for a short while. He quickly came to his senses and said embarrassedly, "I don't know anything else."
Although Liu Che felt that he shouldn't ask, he still couldn't help but ask: "Then how can we go to the fairyland?"
Liu Tan looked at Liu Che seriously and asked, "Father, are you really going?"
Liu Che hesitated a little, but still said, "I long for it in my heart."
Liu Tan simply said, "It's not impossible to return after going to the Immortal Realm, but I can't go now. If I want to go, I have to meet a condition."
Liu Che was indeed concerned and asked, "What is it?"
Liu Tan said word for word: "Develop the art of investigating things. When the art of investigating things reaches a certain level, you will naturally be able to go to the immortal world."
Come on, our journey is to the sea of stars.
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