Hunan restaurant, in the box.

Yun Tianming drank all the wine in the cup, then frowned and said, "Yan'er, when I sold that pottery drum at a high price, I was targeted by a gang. The gang firmly believed that the pottery drum in Yan'er's hand was what he got from the tomb. ”

Kong Shucheng: "Uncle, what's going on with that camphor leaf?"

"I heard Yan'er say in her diary that the leaf accidentally fell out of the pottery drum. ”

"So, Senior Brother Yun Yan hasn't solved this mystery either?"

"Hmm. Yan'er didn't know anything about this. However, after the gang kidnapped him, they continued to question him, and even imprisoned him in the basement. You found him in the trunk that night because they were preparing to kill my fainting Yan'er........."

Speaking of which, Yun Tianming couldn't say any more.

Kong Shucheng said angrily: "Damn, this group of people is really heinous. ”

Moment.

Yun Tianming let out a long sigh before shaking his head: "Hey, this may be Yan'er's life." If you want me to say, this kind of Tang Dynasty thing unearthed from the tomb is born with an evil spirit, and Yan'er shouldn't have touched this kind of thing at all. ”

Kong Shucheng nodded and didn't say anything more.

And Li Luogan next to him didn't interject, he just kept staring at the leaf pictures on his phone.

After a long time, Li Luogen's eyes suddenly lit up, and he whispered: "If I want to guess, the secret on this leaf is not completely unsolvable. ”

Kong Shucheng and Yun Tianming turned their heads to look at him.

Li Luogen continued: "Come and see, this question on the leaves of this tree. In fact, it can be divided into two parts. First, rank: the number of vectors contained in the extremely independent group. Theorem: Let A be an m*n matrix, then the sufficient and necessary condition for r(A)=r is: the column (row) rank of A is r. I think that's part of it, it's actually a very straightforward problem of linear algebra, and it's not a big problem. In other words, the math problem itself is used to divert the audio-visual. ”

“.........”

Kong Shucheng paused and hurriedly asked, "Teacher Li, do you mean that the person who hid the leaves in the pottery drum actually wanted to deliberately hide it from the tomb robbers?"

Li Luogen immediately nodded: "That's right, that's what it means." If I'm not mistaken, the cultural level of those tomb robbers should not be particularly high, so this linear algebra problem is just to confuse them. ”

Speaking of this, Kong Shucheng turned his head and asked Yun Tianming again: "Uncle, what did the police say? That night, weren't there already two criminals brought to justice?"

Yun Tianming: "Those two prisoners are still under interrogation, they bite to death, and everything is done by themselves." Therefore, if the mastermind behind the scenes does not appear, this matter is a bit tricky. ”

Li Luogen nodded: "Well, during this time, we must protect Senior Brother Yunyan's safety." ”

Kong Shucheng asked again: "Teacher Li, according to your reasoning, the person who hid the leaves in the pottery drum should also know the tomb robbers?"

Li Luogan: "That's right. If I'm not mistaken, that person is probably more than lucky now. He left a puzzle in the pottery drum in the hope that someone would be able to solve the riddle. And I think the first half of this math problem is actually a smoke bomb. What really needs to be unraveled are the last two letters and numbers. r=5 m=1369”

As soon as Li Luogen said this, Kong Shucheng and Yun Tianming also fell into deep thought.

After a while, Kong Shucheng suddenly slapped his head hard and said loudly, "I know." ”

Li Luogen stared at him with wide eyes: "Kong Shucheng, what do you know?"

Kong Shucheng: "I feel that the two letters R and M are just the first letters of pinyin?"

Li Luogen and Yun Tianming glanced at each other, not knowing what he was talking about.

Kong Shucheng didn't speak again, just poured his fingers in water and wrote two Hanyu pinyin on the table.

One is ren (i.e., human);

The other is mu (i.e.: tomb).

Li Luogen slapped the table hard: "Yes, why didn't I think of it? The letter r represents people, and the letter M represents the location of the cemetery. ”

Yun Tianming also nodded: "I think this should be the same meaning." r=5, which means that there are five people in the tomb robbery team. However, this m = 1369......... What does that mean? Could it be that the latitude and longitude coordinates of the cemetery are being said?"

Li Luogen immediately waved his hand: "Impossible." The latitude and longitude coordinates must be two pairs of numbers to be useful. It is impossible to extract latitude and longitude from a single four-digit natural number. Moreover, assuming that the longitude is 136.9, it is basically out of the Chinese continent, and the location is already in the Pacific Ocean or Australia. ”

At the same time, Yun Tianming also fell into deep thought: "Where will that so-called cemetery be?"

It is said that the three stinkers are Zhuge Liang, but at this moment, the three scholars get together, but they can't solve the mystery.

m=1369, what exactly does it mean?

If there was a cemetery, where would it be?

.........

After the banquet was dispersed, Yun Tianming said goodbye to the two benefactors and went to the hospital.

Li Luogen is also ready to return to Mangshan County. Before leaving, he turned his head and asked Kong Shucheng with a smile: "Hey, stinky boy, how do you feel about the nine-school joint examination this time?"

Kong Shucheng: "It's so-so." ”

Li Luogen: "Can you get 130 in math?"

"Well, not necessarily. To be honest, the paper was quite difficult, and I heard that the math paper was 'paraquat'. ”

Li Luogen was suddenly stunned: "The paraquat you are talking about, is it Yang Hongjun of Xijiang Normal University?"

"Yes, Mr. Li, you know him too?"

"Damn, this old fox, it turns out that when the two of us were in the national team Olympiad team, he slept on my top bunk. ”

"Ahh

Kong Shucheng had to sigh, this world is really small. In the future, if I become a super student, will Zhou Luoxia also sleep on my top bunk......... Ahh

"Hey, Kong Shucheng, what are you thinking?"

"No, nothing ........."

"Why did your face suddenly turn red like that bird?"

"Yes, maybe it's because of the drinking!"

Kong Shucheng didn't want to explain anything more. After all, the teacher in front of him, Li Luogen, is not only good at mathematics and programming, but also said to have studied psychoanalysis.

"Okay, Kong Shucheng, then we'll see you again. Looking back, you often come to Mangshan County to play chess with me when you have time, and take advantage of my long vacation now. ”

"Teacher Li, you drank just now, don't drive at night. ”

"Well, I know. I turned the car around and then found a substitute driver. ”

After saying that, Li Luogen had just stepped on his Audi Q7 and was about to start when a figure suddenly appeared in front of the front of the car.

To be exact, it should be a shadow.

The shadow, leaning against the front of his Audi, was motionless.

Li Luogan: "........."

He was shocked.

Damn, shouldn't it be a big sister who touches porcelain?

"Tick ........."

Lee Rogan honked his horn twice.

However, the shadow in front of the car still had no intention of walking away.

Li Luogen was a little impatient, he poked his head out of the window, and yelled at the woman: "Hey, you are sick, right?

Seconds later.........

The shadow slowly turned back.

Li Luogen looked at it fixedly, and almost lost his soul: "It's you?"

She nodded, and said expressionlessly: "Tie Guan Li, you are hiding! You continue to hide! I see if you can avoid this life." ”

Li Luogan: "........."

The two of them looked at each other, and they were at a stalemate.

In the night, Kong Shucheng, who was standing under the shade of the tree, was also secretly surprised after seeing the middle-aged woman's appearance clearly.

At this point, he didn't speak again, nor did he pay attention to Li Luogen's eyes for help, but just sneaked away from the side.........

After all, Tianshan Tong's grandmother, he can't afford to offend Kong Shucheng.

At this moment, the old lover of the year stopped the car on the street, Li Luogen, Li Luogen, you can ask for more blessings.

Tonight, you're either going to stay, or you're going to be at the end of the world.........

..................