The eldest grandson Wuji did not reach out to take the tea bowl, distrustful of the young man in front of him, and did not want to just listen to this scene.

Zhang Yang's face was indifferent after speaking, and he was also a little relieved.

"Does Zhao Guogong think that such a big thing was planned by us?"

The emperor was asleep, and the eunuchs on the side were also sleepy-eyed, so sleepy that their eyelids were fighting, and they saw that there was not much tea in the bowl between Zhao Guogong and the county marquis, so he hurriedly added it, and then stood aside and continued to be sleepy.

After drinking the tea, he was not so sleepy, the eldest grandson Wuji's forehead was dripping with some sweat, and the sweat was almost wiped off by him, and he took another sip of tea and said: "If this matter was planned from three years ago, the old man thought it would not be too difficult." ”

Zhang Yang put down the tea bowl, "What Zhao Guogong said is that it is not too difficult in the first place, and others can do it, Goguryeo is not even as big as a state capital in the Central Plains." ”

"Where did the people in Wen Ting's hands get the weapons?"

Speaking of Wen Ting, Zhang Yang said with a relaxed face: "Actually, Wen Ting doesn't know this person, but I heard that he is the second son of Mr. Wen Yanbo. ”

"It's all because of his old man's last wish to go to Liaodong, Wen Ting may have received a letter from home, and the old gentleman has passed away." Speaking of this, Zhang Yang lowered his eyebrows and sighed, "The old gentleman's life is full of ups and downs and helplessness, but if he can live two more months, he can also see this exciting news now." ”

Speaking of the old gentleman, the eldest grandson Wuji's expression was also a little lonely, "The old man asks you again, where did Wen Ting's weapons come from." ”

Zhang Yang drank the tea, pursed his lips and swallowed the tea, "I don't know below, if Zhao Guogong comes back and asks by himself, the matter of the Ministry of Rites will not be asked a long time ago." ”

"You're still the secretary of the Ministry of Rites."

"Zhao Guogong laughed again, this well-known thing is no longer the official of the Ministry of Rites, and now the affairs of the Ministry of Rites are arranged by Xu Jingzong."

"Even if you say so, you arranged it three years ago."

"It seems that Zhao Guogong still doesn't understand." Zhang Yang was speechless: "Da'an went to Liaodong because of his own will and arranged by the DPRK and China, which has nothing to do with the Ministry of Rites, and the reason why Da'an took people to Goguryeo was to rescue Li Yifu, and on the way to rescue Li Yifu, he had to attack the royal city of Goguryeo, so he had to make this decision." ”

Eldest Sun Wuji's face became darker and darker.

Zhang Yang continued: "All this is just a coincidence, our Ministry of Rites actually found out that there was a problem inside Goguryeo last year, and sent news to Li Yifu back several times, but he was too stubborn to bring back the bones of the Central Plains soldiers, and vowed not to give up, so there is the current situation." ”

The words paused, wiped the sweat from his forehead and said, "Zhao Guogong, can you understand now?" ”

After being silent for a long time, Zhang Da'an's attack on Goguryeo, whether it was an accident or a coincidence, did not use Liaodong's soldiers and horses.

If you want to say that this matter was arranged by Zhang Yang, then this arrangement is beyond reproach.

I can't find a loophole, let alone a reason, everything is a coincidence, everything is not deliberately arranged, everything is an accident.

Maybe the Tang Dynasty really wants to recover Goguryeo in such an absurd way that it is unbelievable, is it possible to let the king of Goguryeo reinstate and pull up the troops and horses, and the two sides will fight again, so that the Tang Dynasty can justifiably conquer once?

This is obviously unrealistic, the reality is that the emperor is a cannibal who does not spit out bones, since he wants to recover Goguryeo, he will definitely take it and build the Andong Protectorate.

Zhang Yang sighed with emotion: "Does Zhao Guogong still have any doubts? ”

The eldest grandson Wuji's eyes were gloomy, "It's too perfect, Old Man Zhang Yang underestimated you at the beginning, you are a person who plans and then acts, you have indeed changed." ”

"How has it changed down there?"

"You were arrogant and conceited at the beginning, Your Majesty asked you to follow the prince to study, in the Chongde Palace, in the library study, you read so many books, you didn't waste it in those three years, you did grow, and you did grow, from now on, the old man will no longer despise you."

The eldest grandson Wuji drank the tea in the bowl in one gulp, he remembered Gao Shilian's warning at the beginning, and also understood the good intentions.

Standing up slowly, he straightened his clothes and said in a low voice: "Zhang Yang, after you left the position of the waiter of the Ministry of Rites, His Majesty beat you for three years, and at that time, many people expected that you could sharpen the edges and corners in the beating and become a more stable courtier. ”

"Later, three years passed, and you became the secretary of the Ministry of Rites because of your dedication to Gaochang, and at that time your style was still the same, some people said that His Majesty beat you for three years and made you study hard for three years, you have not changed anything, you are an unteachable person."

Eldest Sun Wuji frowned and said: "It is good and worthy of admiration for a person to be able to grow up with everything, but a person who hides what he has learned because of the world and experience, and is still cynical on the outside, but has far-reaching calculations in his heart, this kind of person can achieve great things." ”

"So Zhao Guogong is going to quote the scriptures?" Zhang Yang said innocently with his hands in his hands, and even blinked innocently.

"Yue Wang Goujian is worthy of admiration, you are different, you have always hidden your true intentions, and the poor dagger will not be revealed at the last moment, and you are also very young."

Zhang Yang had a smile on his face, "Zhao Guogong wants to pinch to death...... Right! It's like pinching an ant to death, how can I have so many cities and calculations, it's really a misunderstanding. ”

"A few days ago, the old man read the newspapers of various states and counties, and a person named Pei Xuanji used the name of your Taifu Temple to check the cultivation of crops outside."

Zhang Yang nodded heavily and explained: "Please don't be suspicious of Zhao Guogong, he was sent by us to understand the state of crop cultivation, because the file of Taifu Temple has been broken since the third year of Wude, and there are still many remnants that are incomplete, and it needs to be recounted and recorded, and people need to be sent to various places to check the situation." ”

"If you tell Zhongshu Province about this kind of thing, all localities will naturally send the recital report, so why bother so much."

"Zhao Guogong doesn't know that if the state capitals in various places want to make their governance effective, it will inevitably exaggerate, and only if they send someone to see it, can they be regarded as knowing it in their hearts."

This trip to Lishan, in addition to seeing the Emperor Taishang, naturally asked Zhang Yang for words.

The eldest grandson Wuji was about to leave, and said: "Yesterday, His Majesty ordered that he should come to Lishan for summer vacation, you should prepare early, and the old man will go to see Zhang Gongjin." ”

"Zhao Guogong walks slowly."

Until the eldest grandson Wuji left the mansion, Li Yuan closed his eyes and whispered: "This person is suspicious, don't be surprised." ”

Zhang Yang smiled: "How can you see strange things in the next place." ”

Li Tai was still looking at the drawings in a daze......

Shaking his head and sighing, Zhang Yang stepped forward, "How is His Royal Highness King Wei's progress?" ”

Li Tai supported his fat face with one hand, sitting cross-legged, holding the drawings in the other hand, and there were some bloodshots in his eyes, "The air pressure of the steam engine is very large at the upper end, but it weakens at the lower end." ”

Steam rises, and the air pressure drops when it reaches the lower end, which is quite a simple logic, after all, steam is the rising force.

Zhang Yang glanced at his drawings, there was basically no problem, and said, "Why doesn't His Royal Highness King Wei add a device at the bottom." ”

"What device?" Li Tai preached weakly.

Zhang Yang picked up a charcoal pen resting on his ear, and now the technical layer on Lishan has become accustomed to writing with charcoal, sharpening it with coal and stone, and sandwiching two layers of wood.

This kind of charcoal is rectangular, mainly rectangles are simple to make, and it is too troublesome to make cylinders.

And the rectangle is more suitable to hold in the hand, which is the experience of Lishan people.

When they saw that the owner of Lishan was using charcoal to write, they would naturally follow suit, and when they knew that this charcoal pen was easy to use, and they didn't use ink, which saved money.

On the basis of cost savings, everyone uses this pen.

Graphite is now too hard to come by and expensive, making it unrealistic to make authentic pencil techniques and materials.

At the beginning, I was in line with the idea of making do, but I didn't expect it to spread so quickly in this part of Lishan.

Zhang Yang revised on Li Tai's drawings while explaining: "His Royal Highness King Wei's idea is correct, but the usage of steam is wrong, steam generates pressure to push other things, and it takes a lot of pressure, since the air pressure at the lower end is not enough, then make a device to accumulate air pressure below." ”

"Of course, under the effect of the air pressure difference, once the steam is released, the thrust will be weakened, so the steam cannot be released before the kinetic energy is generated, which is where His Royal Highness the King of Wei misunderstood."

Li Tai listened very carefully, and sweat fell on the drawings drop by drop.

Zhang Yang drew a box and designed an air valve in the box, "King Wei, please see, when the steam inside is enough, push this air valve, and generate kinetic energy." ”

"In this way, the principle of releasing steam before kinetic energy is generated is achieved."

Li Tai was puzzled: "This king has thought about it, but it is useless to just push the air valve, do you have to pull it back and work repeatedly?" This is different from what was envisaged in advance, how to retract the air valve? ”

Zhang Yang smiled: "It's very simple, remember our water wheeler?" ”

"Of course I do."

Zhang Yang continued to sketch the drawings and drew a tie rod at the front end, "When the air pressure is pushing the tie rod at the same time, the wheels at the front end are pulled by the tie rod and make a rotating motion. ”

Li Tai nodded to indicate that this part could be understood.

"There are two inlets for air pressure to enter the valve, and when one end is pushed, the other end also slides, and the steam is discharged after each repetition, so the cycle is complete."

Changing a sample for him, Li Tai thought about it for a while, as if he was digesting this knowledge.

Suddenly looking up and seeing Li Yuan standing aside without knowing when, Zhang Yang smiled and said, "Do you always understand?" ”

Li Yuan snorted coldly and turned his head to leave.

Li Tai hurriedly put away the drawings, "Thank you brother-in-law for your advice, this king finally has a way to crack it, it turns out that it has not been that the air pressure is not enough, but that no matter how big the internal air pressure is, as long as the steam comes out, it will lose pressure." ”

"The air pressure has nothing to do with the internal temperature and capacity, and the air pressure released is equivalent to a different environment, and no matter how big the air pressure of the external environment is, it is at most just a gust of wind, so this is the truth."

Although this fat man is greedy, he has never succeeded in losing weight, and his understanding and understanding have always been strong since he was a child.

He is a little clear about many problems, and with his talent and practical experience, his understanding of physics has surpassed everyone in Datang.

For Zhang Yang, who has been studied precisely and systematically in later generations, this is just a very simple physical knowledge.

Seeing that he had already comprehended the problem, Zhang Yang nodded and said: "In fact, the pressure inside the steam engine is sufficient, and the work needs to be done internally, not externally. ”

"Before, this king thought it was simple, so let's try it." Li Tai ran back just as he was about to leave, "Do you use beef tendon for the gas valve?" ”

Zhang Yang sighed melancholy, "The beef tendon will also be stewed, the temperature of the steam is so high, what does His Royal Highness the King of Wei think?" ”

It's been three years, and I've been haunted by the steam engine for three years......

Li Tai only felt that he had lived in a dream for the past three years, his beard had grown, and he had not yet built a steam engine.

Li Tai said again: "Use cork and fine iron, yes!" ”

The fat man lifted his pants and ran away.

The steam engine has become a demon in his heart, and if he can't build it now, he will be deep in it for the rest of his life.

Li Tai's guards said aggrievedly on the side: "Thank you for the guidance of the county marquis, His Royal Highness the King of Wei has been too bitter this year." ”

Zhang Yang shook his hands and wondered: "Really?" ”

"Yes, His Royal Highness the King of Wei has not slept until noon for a long time, and he rarely cooks by himself, and he comes to the Emperor Taishang to eat all day long, His Royal Highness the King of Wei said that this is more trouble-free and time-saving."

Zhang Yang patted the guard on the shoulder, "When His Royal Highness the King of Wei creates this thing, the prosperity of the Tang Dynasty will have his name and credit." ”

"I hope." The guard also ran in the direction where Li Tai left, and his back full of sadness made it unbearable to look at directly.

When the King of Wei and the Emperor Taishang left, the courtyard was empty.

After the eldest grandson Wuji left, Zhang Yang went to see the teacher, and Zhang Gongjin was drinking the decoction at this moment, "The old man listened to the eldest grandson Wuji about Da'an, why didn't you say it yesterday." ”

The decoction in the bowl had been drunk, and Zhang Yang stretched out his hand to take it, "I thought about such an important news, I should let Brother Elephant and Dasu tell the teacher." ”

Zhang Gongjin nodded slightly, "You are more sophisticated than before." ”

The teacher laughed.

Looking at this student who worshiped himself as a teacher at the beginning, he still looked jerky at that time, Zhang Gongjin smiled: "Yes, the old man is right, there are some things that don't need to be taught, and if you have experienced a lot, you will be able to learn it." ”

These words are full of bitterness, Zhang Gongjin is a pessimistic person who has been optimistic about the teacher before.

After Wen Yanbo passed away, it seemed to have given the teacher a huge blow, and he returned to his previous pessimistic appearance, the reality is bitter, whether it is in the previous life or in this life, just like the teacher said.

The teacher's family affairs are the teacher's business, and as a student, you can help one or two, but you can't participate too much, especially the teacher's evaluation of your son.

Zhang Yang helped the teacher tidy up the desk, "Did Zhao Guogong say anything?" ”

When the student's skills and the city government had surpassed the teacher, Zhang Gongjin couldn't say whether he was proud or helpless, and felt more and more old, he said in a low voice: "I said some common things, and said that Da'an should go back to Chang'an as soon as possible." ”