Although having such a brother-in-law is annoying, it can save a lot of trouble on some things.
"There is an experiment I want to discuss with your father." Zhang Yang looked serious.
"What experiment? Are we going to make delicious food again?" Li Tai took another sip of milk tea.
"It has nothing to do with eating. I'm here for your sister's dream. This dream has been bothering her for a long time."
"Okay, for the sake of the imperial sister." Li Tai nodded, "You can enter the palace with me and no one will stop you."
The arrogance of this little fat guy makes people really want to kick him.
With Li Tai's help, the journey was much smoother, and there were no excessive questioning from the guards.
All the way to Hanyuan Hall, Li Shimin was sitting inside, reviewing memorials.
Under the leadership of the eunuch, he walked into the Hanyuan Hall.
Presumably Taiji Hall and Hanyuan Hall are very small. Li Shimin is writing, and he looks quite attentive when writing.
After a while, Li Shimin put down his pen.
Li Tai bowed and said, "My father's writing skills have improved a bit."
Li Shimin wiped his hands, "That's a lot worse than Yu Shinan and the others."
"Father, Mr. Zhang said that he has something to discuss with his father."
This was the first time that my son-in-law came to see me on his own initiative.
Li Shimin sat down and drank tea, "Your tea is very good."
Zhang Yang bowed slightly and said, "It will also be sold in the fiefdom in the future."
Li Shimin put down the tea bowl, "I heard that you two bought all the tea in Chang'an City."
Li Tai lowered his head and remained silent.
This was a bit blaming. Zhang Yang cleared his throat and said, "I didn't expect that there are only so many tea leaves. There will be more in a few days, eh."
"Tell me, why did you come to see me?" Li Shimin stared at Zhang Yang, observing his expression.
"I have an experiment. If this experiment can be successful, maybe everyone can go to heaven in the future." After Zhang Yang said it, he thought for a while and wondered if it would be appropriate to describe it this way.
"What experiment?"
"An experiment that sends people to heaven."
"Do you know what you are talking about?" Li Shimin stared wide-eyed.
"Actually, the principle is not very difficult. It's just that I've been doing it for a long time, and now I've finally made some progress. However, this experiment is somewhat risky."
Li Shimin put his hand on the table.
Li Tai was silent, thinking about what Zhang Yang's words meant.
Two eunuchs stood aside.
Waves of cold wind blew into Hanyuan Hall, making the hall feel much colder.
"What kind of risk?"
"It's easy for people to fall to death."
Li Shimin was silent again.
Zhang Yang bowed and said: "So I want to ask Jieli Khan to do this."
"Why?"
"When it comes to Jieli Khan, everyone probably doesn't care about his life or death."
"He is the uncle of Tuli Khan."
"Tuli Khan broke up with Jieli Khan many years ago, and the two had conflicts."
"..."
"It is written on the eucalyptus scroll of the Ministry of Rites." Zhang Yang added
After another moment of silence, Li Shimin said in a deep voice: "Jieli cannot die in my hands."
"For the reputation of Your Majesty as a benevolent king?"
"Your tone of voice is very rude."
"I, country people don't know the rules very well."
Li Shimin took a deep breath and asked, "Can people really go to heaven?"
Zhang Yang said in a low voice: "Theoretically, it is possible, but the current technical level is not enough. A height of several hundred meters is already very good. If this is of value to His Majesty, it is very cost-effective to exchange Jieli's life for the results."
of."
There was silence for a while.
Zhang Yang continued: "This is to give Jieli a reputation for freedom. If Jieli can be safe and sound, then let him be free. If he dies, it will be his own life."
Li Shimin nodded and looked at it, "Jieli must volunteer."
Zhang Yang bowed slightly and said, "In the face of freedom, he will volunteer."
Li Shimin took out a jade plaque and said, "Jieli's life is yours, and I also want to see the value of this experiment."
"I understand."
Zhang Yang took the jade token from the eunuch.
Li Shimin picked up the pen again, "Is there anything else?"
Zhang Yang bowed slightly and said, "I take my leave."
Li Tai also followed Zhang Yang out of Hanyuan Hall.
Li Tai, who was following him, was also puzzled. Zhang Yang looked very calm when he saw his father.
In Li Shimin's eyes, Jieli's life and death must be voluntary.
This is his benevolent heart.
Because of the Xuanwu Sect incident, Li Shimin is now very concerned about his reputation.
Li Shimin wants to be a kind king in front of the people of the world.
Is Li Shimin actually kind? He kills without blinking an eye.
Li Jiancheng and his entire family were killed by him.
Zhang Yang walked out of the palace with a jade tablet in his hand, and two eunuchs led the way down to a house in Chang'an City.
Li Junxian, who was guarding the door of the house, stepped forward and asked, "What's the matter?"
The eunuch told Li Junxian what happened.
Zhang Yang handed over a sign, and after Li Junxian confirmed the jade sign, he let people in.
The security here is very tight.
When I walked into this house, I saw a middle-aged man holding a sheep. His hair was black and white, and he looked messy.
He has been imprisoned here since he was captured.
This guy is going crazy holding the sheep.
Li Tai whispered to Zhang Yang: "Is this guy crazy?"
Jie Li saw the person coming and backed away a little while holding the sheep.
Li Junxian stood aside holding a horizontal knife.
"Give you a chance to be free." Zhang Yang looked at the Khan who once dominated the Turks.
Jie Li said nothing, his eyes were wary.
"I'm going to do an experiment. If you can survive successfully, you can go back to the grassland. You can go anywhere. But I tell you that this experiment is also risky. If something happens, you will either become disabled or die."
Jieli shouted a few words in Turkic dialect, but he had no idea what he was talking about.
Zhang Yang knelt down, looked at him and whispered: "Do you want to be under house arrest here for the rest of your life, or do you want to seize this opportunity to escape? His Majesty has agreed."
Jieli also said a few words in Turkic dialect.
Zhang Yang looked at Li Junxian, "Can't he speak Guanzhong dialect?"
Li Junxian said with a straight face, "He can speak Guanzhong dialect and understand it."
Zhang Yang stood up slowly, "I can tell you that Tuli will come to Chang'an soon. The court is also trying to comfort Tuli Khan. If Tuli wants to take you back to the grassland, your life or death will be uncertain, not to mention Duer.
I'm going to kill you."
Seeing the change in Jie Li's expression, Zhang Yang didn't stop talking.
"I can protect you for a while in Chang'an City. People in the Central Plains are very filial. You are the uncle of Tuli Khan. It is only natural that Tuli Khan should take you to fulfill your filial piety. You die on the grassland or in Tuli Khan
It has nothing to do with us if he dies in the hands of other Turks."
"This is your last chance, a chance to be free and save your life. You must consider it carefully."
Seeing that Jie Li still didn't speak, Zhang Yang shook his head and sighed, turning around and leaving.
"I promise you!"
When he was almost reaching the door, Jieli's words came.
Zhang Yang looked back at him suspiciously, "I thought you were really crazy."
Jie used Turkic etiquette to salute in the direction of Taiji Hall.
Zhang Yang looked at Li Junxian and said, "I'll pick him up in two days."
Li Junxian handed the jade token back to Zhang Yang, "I understand."
Li Tai followed Zhang Yang all the way out of the house, "Can people really fly?"
"This is not flying." Zhang Yang was still thinking about the plan.
"How did it get to heaven?" Li Tai continued to ask.
"Do not want to tell you."
"Why?"
"If you ask again I will beat you."
Li Tai stopped questioning, looked at Zhang Yang's back, and stamped his feet angrily, unable to stand up in front of Zhang Yang.
Zhang Yang returned home and told Li Yue what happened.
"Father, did you agree?"
"Yes, Jie Li agrees."
Li Yue whispered, "All the pigs in the experiment died."
Zhang Yang shook the cattail leaf fan and said, "He did it voluntarily. If he didn't have this opportunity, he would either be under house arrest for the rest of his life or die in the hands of Tuli Khan."
Li Yue clenched her fist and said, "My husband's experiment will definitely succeed."
The couple sat down and revised the drawings. Li Yue wondered: "Why are there so many sandbags hanging on the basket?"
"The sandbag is used to adjust the lifting force. If you untie the sandbag and throw it away and reduce the weight, it will rise faster and higher."
"This bellows is used to adjust the descending and ascending firepower."
"That's right."
Li Yue looked at the drawings and said, "Why didn't I think of the use of the bellows before? Blacksmiths also need this thing when making iron."
"Yes, its principle is also simple. Compressing air allows fuel to burn more fully."
Li Yue looked at the current drawings that were much more complex than the ones he had designed before, and were several times larger in size.
The drawings were drawn late into the night, and in addition to the large drawings, there were also drawings of the bellows.
This bellows is not horizontal. It is designed at the bottom of the fire pit. It can be pulled and pushed vertically. It feels like lifting a dumbbell.
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After working on the drawings all night, Zhang Yang fell asleep for a while and then got up to go to court.
While Li Yue was eating breakfast, she lined up the drawings on the table. Aunt Yang took the drawings of the brazier and the bellows and took them to the blacksmith shop to have them made.
The brazier is a large hollow cylinder, with a gap between the bellows and its bottom for full combustion, so that the fire will not suffocate inside.
It’s the same as Zhang Yang’s previous clay oven.
The air box compresses the air to increase combustion. The compressed air generated by constant pushing and pulling helps combustion, and the flame will get higher and higher.
This continuous accumulation will increase the heat in stages, just like a gust of wind pushing continuously.
Li Yue threw up a piece of thin cloth and blew on it, and the thin cloth would rise. If he kept blowing, it would float higher and higher. This is the principle of lifting force described by your husband. If the influence of air resistance and gravity is not considered,
You can even make it rise faster.
Is this the power of physics that your husband mentioned?
Li Yue looked at the drawings blankly. Learning mathematics can make you look at everything differently, because you have mastered the numbers.
What kind of power is it to learn physics well?
Li Yue became even more curious about the physics taught by her husband. The relationship between various forces she had been learning was well demonstrated in this hot air balloon experiment.
Show that what you learned is useful.
Three days later, on the outskirts of Chang'an City, Li Yue and two aunts worked together to make a very huge Kongming Lantern.
A black cylindrical brazier with a lot of coal inside.
There is a large bellows under the brazier. The push rod of the bellows is very long and has been placed in the basket.
Li Shimin took Li Chengqian to the tower of Chang'an City, where he could see the entire experiment process.
Li Chengqian was a little nervous, "Father, I used to think that this kind of thing only happened in stories."
It's outrageous that people can go to heaven.
People are in awe of the sky, but people also look up from time to time.
Li Shimin didn't speak, he just looked ahead.
In a courtyard in Chang'an City.
Zhang Yang brought some wine and food, and Jieli devoured them.
"Why did you feed me so much wine and meat?" Jie Li said while eating.
Zhang Yang drank tea and said, "This may be your last meal. Doesn't the Tang Dynasty have such rules?"
Jie Li snorted coldly: "Since when did we have such a rule?"
While talking, Jieli ate another tea egg.
"There is a reason why I let you eat these. I hope you have enough strength. This experiment is very exhausting for you."
Jie Li patted himself on the shoulder, showing his strength.
I thought he didn't have much muscle either.
Li Junxian watched Jie Li eating with a blank expression.
After burping, Jieli continued to stuff his mouth, until all the food in front of him was stuffed into his mouth, and he continued to chew.
This may be the real last meal for him.
After a while, Jieli let out a long breath and lay comfortably on the ground, "I haven't eaten so happily in a long time."
Li Junxian asked someone to take the bowl away quickly.
Jie Li glanced at Zhang Yang, "Boy, does Li Shimin really want to win over Tu Li?"
"Do I need to tell you this?"
Jieli smiled with relief, "In your Central Plains dialect, Tuli is a person who does not know his own abilities. He is always very arrogant and conceited. He treats his tribesmen harshly and treats herdsmen very cruelly. People like him
Even if he becomes a khan, the Turkic tribes will not obey him."
Zhang Yang listened patiently.
Jieli took another sip of wine and said, "Duer is a wolf. He will always keep an eye on Tuli. He is also eager for the position of the Turkic Khan. Xue Yantuo has rebelled now."
"I tell you that it is useless for the Central Plains to support Tuli Khan. People like him will be eaten sooner or later. The grassland does not have as many principles as the Central Plains. The only principle of the grassland is strength."
"You Central Plains people often say that we are barbarians. This is because the tribes on the grassland are all predators of the jungle. Whoever is the strongest is the Khan of the Turks. Tuli is not strong. He is very strict but he does not have the ability to lead the grassland."
"Xue Yantuo of Mobei has indeed rebelled." Zhang Yang said suddenly.
Jie Li smiled again, "It wasn't Li Shimin's trick. Back then, Li Shimin met with Xue Yantuo's Yi Nan and secretly joined forces. When I led the Turkic warriors to go to war with the Tang Dynasty, this Yi Nan made a surprise attack from behind. How else could we lose?"
"Don't be so harsh. If you lose, you lose." Zhang Yang whispered.
"Hahaha!" Jie Li laughed, "Let Xue Yantuo take advantage of the opportunity to win so many territories. Now they will only become stronger. The chaos in Mobei will make Li Shimin more and more troublesome. This is all what he asked for."