Madam, protect me!

Li Nuo walked out of the county government office before the end of the court.

There are fewer and fewer cases every day. All the cases today have been judged, and his life span has only increased by two days, which is not as good as the fraction of those second-generation officials.

It is easy to go from frugality to luxury, but it is difficult to go from luxury to frugality. After only one day, Li Nuo has begun to miss them.

Wu Guanjia sat in the carriage. After Li Nuo got on, he asked, "Master, are you going home?"

Li Nuo shook his head and said, "No, I'm going to the Song family."

If he goes back, he will be alone, which is too boring. It is better to stay at the Song family. Not only is it close to the county government, but there is also Mu'er to relieve boredom. Of course, the most important thing is that at the Song family, he can sleep with his wife at night.

On the first day he came here, he was almost assassinated by his personal maid in his sleep, which made Li Nuo worried about everyone in the family except his wife and Wu Guanjia.

With his wife by his side, he slept soundly.

When Li Nuo returned to the Song family, he saw Song Muer practicing martial arts with Song Jiaren. Her fists were waving vigorously. Every time she punched, there was a dull sound in the air. Li Nuo had no doubt that she could break his bones with one punch.

Wu Guanjia said that Song Muer and Song Ninger both had good martial arts talents, but it seemed that only Song Muer embarked on the road of martial arts.

There is no shortcut in the martial arts. Talent and hard work are indispensable. It is more difficult to practice than the way of a hundred schools. It requires strong perseverance and long-term persistence to achieve something.

Most of the spoiled children of the rich and powerful are unwilling to eat this kind of hardship.

There are many people in Chang'an who have good martial arts talents but do not practice martial arts.

They don't need to practice hard by themselves, and there are countless martial arts masters who are willing to stick to them, kowtow, and serve them.

Although Li Nuo himself is also one of these powerful people, he is born with insufficient conditions. Unlike those guys who let their talents go to waste, Li Nuo only envy them.

Some people are born with but do not cherish what others dream of.

After watching Song Muer practicing with envy for a while, Li Nuo went back to his room to get a book and read it in the pavilion in the courtyard.

After a while, Song Muer came running over and asked happily: "Brother Li Nuo, will you live in our house in the future?"

Song Jiaren's eyes also looked over intentionally or unintentionally.

Li Nuo looked at her and explained: "This place is closer to the county government office, so you and Muer don't have to run every day. If it's inconvenient, forget it..."

Song Jiaren didn't say anything. She knew that he had to go to the county government office every day, and she didn't think much about it. It was a bit troublesome for her to take Muer back and forth between the Song family and the Li family every day. He lived in the Song family, which was convenient for everyone.

After dinner at the Song family, Song Muer brought another math problem to Li Nuo.

Li Nuo glanced at the question and did not explain it to her directly as before.

This is still a question related to the battlefield. Facing the sudden invasion of the enemy country, a team of Daxia cavalry needs to rush to a city to provide support in the shortest time.

Originally, walking in a straight line between the two places is the fastest, but there is a desert between the military camp and the city. If they walk in a straight line, the speed of the cavalry will be greatly reduced. If they take a detour on the post road, although the speed is faster, the distance they walk is also longer.

Now we need to find the best route so that the cavalry can reach the city in the shortest time.

This question is similar to the "General Drinking Horse" problem. Both are problems of finding the maximum value, but the solution is completely different, and the difficulty has also increased.

If it is only slightly more difficult, the problem is not big, but the difficulty lies in that solving this "Hu Bugui Model" problem requires the use of trigonometric functions, which is also the content learned in the third grade of junior high school in later generations.

Daxia's mathematics is still at the basic stage and has not developed trigonometric functions.

Li Nuo vaguely remembers that trigonometry from another world was not introduced to China until the Ming Dynasty.

There is a chapter in the "Mathematical Classics" called "Pythagorean theorem", but the content of the study is very limited, involving only the most basic trigonometry problems.

This problem seems simple, but it is actually far beyond the scope. With the existing means of Daxia Mathematics, there is no way to get the answer.

Li Nuo has taught Mu'er for so long, and he is very clear about her current level of mathematics and understanding ability. This is not the knowledge she can understand at this stage.

Seeing that he has not spoken for a long time, Song Mu'er asked in surprise: "Brother Li Nuo, don't you know this question?"

In her heart, Brother Li Nuo is the smartest and smartest person in the world.

Li Nuo shook his head and said: "It's not that I don't know, let me try to explain it to you and see if you can understand it..."

After a while, looking at Song Mu'er and Song Jiaren who looked confused, Li Nuo waved his hand and said: "Forget it if you don't understand, this question is indeed a bit difficult for you..."

He still knows the level of his wife and Mu'er very well, and the final result is not beyond his expectations.

Li Nuo didn't know why her math teacher gave her this question. Mu'er didn't have to take the imperial examination. Besides, this question was in the imperial examination, and no one could answer it.

It's not that the "Hu Bugui" question is difficult, but it's hard for a good cook to cook without rice. They don't have the relevant knowledge at all. Even if it only involves the content of elementary mathematics in later generations, it is an unsolvable mystery for them.

After playing Go with Mu'er for a while, the sky gradually darkened.

Li Nuo returned to the room, sat at the table, and continued to study the works of the Legalists. What surprised him was that his wife was also sitting by the bed reading a book. Li Nuo took a closer look and found that she was reading "Shuowen"...

It seems that she still took those words that Song Yu said to her to heart.

This made Li Nuo feel a little dissatisfied with Song Yu. Isn't it just knowing a few more words? What's there to be proud of? Why did he say that about his wife? If he falls into his hands again in a fight next time, he must let those yamen runners whip him a few more times...

Thinking like this, Li Nuo continued to read.

After these days of in-depth research, Li Nuo found that the Legalist school is really not easy to cultivate. Although the strength is far ahead of other schools, the ending of the Legalist strongmen is too miserable. Most of them do not have a good end. What kind of torture is torn apart by a chariot, lingchi, beheading, skinning...

There are all kinds of tortures, beheading is considered light among them, and basically no corpse is intact.

In the process of their cultivation, they offend too many powerful people, and before they die, they often face extremely fierce revenge.

The more Li Nuo read, the colder his heart felt. It was a hot summer night, but it didn't seem so hot. He was hit hard. He closed the book and didn't want to read these horrible things anymore. He planned to look at the beautiful lady to relax...

When he turned his head, he found Song Jiaren leaning against the bed, holding a book in her hand, but her eyes were closed.

Li Nuo shook his head helplessly. It seemed that she was not good at reading.

He walked over quietly, sat on the bed, and looked at her closely.

It must be said that although the lady was uneducated and her figure was not outstanding, her face alone could make up for all the shortcomings.

Just looking at her quietly, Li Nuo's heart, which had just been hit, was healed by ten thousand points...

Li Nuo was lost in thought until the long eyelashes on this beautiful face trembled and a pair of beautiful eyes slowly opened.

The two looked at each other for a long time, then Li Nuo looked away, looked out the window, and said with a smile: "Look, my lady, the moon is so beautiful today..."

Song Jiaren looked out the window, and the night sky was pitch black, with no stars or moon in sight.