Lu You saw Yan Yan looking at him in surprise, but he quickly realized that he had leaked his mouth.

After a brief panic, he told the truth, "When I was a child, I also studied the map of the Great Zhou, and there was a large map in my father's study, so I remembered all the cities on these borders, and also remembered the approximate distance between them. ”

"Brother-in-law, you are a child prodigy, can you still remember the things you saw when you were a child?" Yan Zhang was also excited when he heard this, and forgot his worries for the time being.

Lu You still hasn't adapted to other people's praise of him, so he blushed a little when he heard Yan Zhang's words, "I'm a prodigy, I just pass the time by myself, your eldest sister is a real talented girl." ”

"Okay, don't talk about this for now, just say Ah Zhang, listen to the eldest sister, wait for the news at home with peace of mind, if you really don't want to go to the academy, you can do it, stay at home with your mother, don't waste your studies." Yan Yan obviously didn't want to spread the peculiarities of her husband.

In fact, she had already discovered that Lu You had the ability to never forget, but there were some things that no one explained to him, so he could only read a sigh and couldn't really understand the meaning of this text, so Yan Yan sent him to the academy.

But she didn't want this matter to spread to the Lu family, especially to the mouths of the Zhu family and Lu Ming, so she diverted the conversation.

"Sister, I, I'm really... Yan Zhang also wanted to get Yan Yan's consent.

In fact, Ma and Yan Yu Yan Tong also did not approve of him going to the front line, so he came to Yan Yan, hoping to get Yan Yan's support and also hope that Yan Yan could persuade his mother.

"Okay, this matter is settled, if you still treat me as the eldest sister, you will listen to me, I think whether it is the second uncle or the second aunt, they don't want you to take this risk, you are too young, listen to the eldest sister's words, the coming day is long, I haven't heard a word, it's not too late for a gentleman to take revenge for ten years, are you afraid that you won't have a chance to get back this in the future?" Yan Yan interrupted Yan Zhang's words.

"That is, there is another saying, it is called ten years to sharpen a sword, Yan Zhang, opportunities are reserved for those who are prepared." Lu You helped to add another sentence.

"Got it, eldest brother-in-law, you're a bit talkative today, and I've never found that you're quite good at persuading." Yan Zhang listened to the persuasion of the two, and was also in the mood to tease Lu You.

"I'm afraid that your eldest sister will worry about you." Lu You told the truth.

If it weren't for Yan Yan's sake, how would he care about Yan Zhang?

"Got it, I'll go home first." Yan Zhang also thought of his mother and two sisters who were worried about him at this moment, so he wanted to go home.

Sending Yan Zhang away, Yan Yan and Lu You returned to the inner courtyard, Yan Yan picked up the books on the kang and put them in front of Lu You, and asked him what they had read.

Lu You picked up these books and flipped through them one by one, and then picked out a copy of "Water Classic" and "Water Scripture Note", "I haven't read these two, and I've read the others." ”

Yan Yan picked up a copy of "The Book of Wood" and asked, "Have you also read this?" ”

Lu You nodded.

"Have you studied the machinery inside?" Yan Yan asked.

Lu You nodded hesitantly, and then shook his head again, "I've only thought about some simple ones, the carpentry part of the map mold you made last time was practiced when you were a child." ”

Seeing this, Yan Yan took out another copy of "Mozi" and looked at Lu You, who nodded again.

"Can you read these drawings?" Yan Yan flipped to the section about the repeater and asked.

Lu You nodded again, "It's easy and okay, but the difficult ones won't be in the future." ”

Seeing this, Yan Yan took out books such as "Sun Tzu's Art of War", "Overview of the Eight Formations", and "Hundred Battles" to test Lu You, and found that Lu You was particularly familiar with these art of war and formation books.

"Will you actually apply it?" Yan Yan asked, and then she gave an example, for example, if the Khitan people surrounded the capital with 100,000 troops, how should this game be broken?

Lu You obviously didn't think about this problem, so after listening to Yan Yan's words, he sat down and thought about it carefully, and after a while, he took a few books and put them in front of Yan Yan, the middle is Shangjing, the west is Xingyang, the north is Puyang, the east is Caozhou, and the south is Huaiyang, these four places are not far from Shangjing, and in the four directions of Shangjing, if Shangjing is besieged, the troops of these four cities can rush to the rescue as quickly as possible, but how to fight this battle will have to take a lot of twists and turns.

"Yes, judging from the map, it should be Xingyang and Caozhou that are the closest, the troops of these two cities can arrive within a day or two, and they can take advantage of the night to sneak attack with a firearm or gunpowder from behind, because the troops besieging the city must be stationed quite concentrated, and there is another point, the 100,000 army of the Khitans can cross the Yellow River so easily, it should be winter, such a long journey, grain and grass must also be a big difficulty, we can send part of the troops to attack their grain and grass first."

Speaking of this, Lu You paused for a moment and looked at Huaiyang in the south and Puyang in the north, "The troops in these two places are slower, but they can just hit the opponent's backhand, and at the same time, they can also cut off the opponent's backup." Actually, I forgot one thing, the Khitan army of 100,000 is going to cross the Yellow River, we can't have no news in advance, right? Since we can't stop them from besieging the city, we can still dig some traps outside the city, or stop them halfway through and set up an ambush or something. ”

Yan Yan was even more surprised when he saw that Lu You's thinking was so clear, not only did he understand the art of war formation, but he even thought of the mechanism.

Subsequently, Yan Yan told Yan Peng about the two ambushes encountered by Yan Peng's attack on Weizhou, and she wanted to know how he would break this situation if it was Lu You.

Lu You shook his head, such a large group of people and horses have to cross a mountain road, it is impossible not to encounter an ambush, it depends on who is smart and can occupy the favorable terrain first, or to see who can finally calm down, and just can't go over, to see how long the other party can hold on to the mountain, and another way is not to get tired of deceit, first send a small team to test, or pull a little more scarecrow or dummy to pretend to cross the mountain at night, and the real big army is waiting to be a yellow finch in the back.

"Of course, these are all on paper, and the specific way to do it must be analyzed according to the situation at the time, lady, do you really want me to go to the battlefield?" The more Lu You talked, the less interested he became.

Although he had a heroic dream, but there would be no Yan Yan yet, besides, it was just a dream after all, he was now both a husband and a father, where was he willing to leave this mother and daughter to take risks?

Yan Yan didn't mean to force him to go to the battlefield, she wanted to use his skills to see if he could improve the trebuchet and ballista or something, and even have a mechanism or something, don't underestimate these things, they can come in handy at a critical time.