Formation diagram, this can be said to be the most distinctive discipline in the entire cultivation realm. In this cultivation realm, anyone who is linked to cultivation is not useless for the formation diagram knowledge.

When cultivating, you need a formation diagram, weapons and equipment need a formation diagram, and even if it is something that a cultivator uses in his daily life, he also needs a formation diagram.

Therefore, according to normal speaking, it is natural to learn the most formation in this world.

But after Lu Yun's observation, it was far from the case.

It can be said that there are very few people from the entire formation building, such a big building, the classroom where Lu Yun is located is about 300 square meters, but there are only five people!

Five!

That's still about five minutes to go.

Lu Yun didn't believe that there could be more than a hundred or ten people in the last five minutes, it couldn't be so coincidental.

So Lu Yun first found a seat and sat down, and then began to observe.

Something is wrong.

Fortunately, after a while, another junior sister came in, Lu Yun turned his head to look, the junior sister was about one meter six or five, and she was a little petite and exquisite. With waist-length hair and two bows tied on her head, she looks a little less fairy, but she feels more like a little girl next door.

The eye rim is not bad.

After the junior sister entered the classroom, she found a random place to sit down, and then took out a booklet from the backpack she carried with her, and then began to take a pen and calculate there.

Lu Yun watched it interestingly, and unconsciously leaned over.

Originally, Lu Yun thought that she should be practicing drawing a formation diagram, but the result was ......

She's actually doing geometry problems!

"This junior sister," Lu Yun asked curiously, "This lesson should be formation diagram learning, right?" Why are you doing geometry problems? ”

"Geometry?" The junior sister obviously didn't calculate it, frowned, and then simply put down the pen: "I'm just calculating the formation diagram." ”

Lu Yun: "Huh? Isn't this geometry? ”

The junior sister saw that Lu Yun was quite unfamiliar, and immediately nodded: "How do you call this senior brother?" ”

"My name is Lu Yun, what about you?" Lu Yun reported his name and looked at the junior sister: "What do you call it?" ”

"My name is Ning Caiyun," the junior sister pursed her lips and smiled, looked Lu Yun up and down, and said, "It turns out that you are Lu Yun, and you did the welcome party, right?" ”

"Exactly," it is easy to know, Lu Yun simply sat down next to Ning Caiyun and asked, "Senior Sister Ning, this ...... you counted"

"Alas, don't mention it," Ning Caiyun sighed and said: "This array is really difficult, I thought that my painting skills were okay, so I chose this discipline, but after choosing it, I realized that this discipline is not only good at painting, but also good at mathematics, and also designs all kinds of calculus, which is really a first two big." ”

Hearing this, Lu Yun was stunned for a moment.

Now he knew why there were so few people here!

This array of graphology seems to be too demanding of people's talents.

In fact, there are so many disciples in the entire Feiyun Sect, and there is definitely no shortage of geniuses and demons among them, but at present, it seems that there are very few people who can learn the formation diagram well, not to mention very few, anyway, there are definitely not many of them.

At least if you count Ning Caiyun and himself in this class, there are only seven people in total.

I'm thinking things simple.

This is actually equivalent to painting skills at least to the level of the Central Academy of Fine Arts, after all, drawing is absolutely not out of shape, and once the formation is out of shape, it will not play a role.

Then, on the basis of not going out of shape, it is also required to have a very high attainment in mathematical sets.

A full score of 150 points does not mean that all the answers are correct, but at least 140 points or more.

These two levels alone have stuck an unknown number of people.

Even if you look at China on the earth, how many people can have such strength with a population of 1.3 billion?

Lu Yun didn't find it difficult to have the Heavenly Dao Laboratory to help him copy the pattern, you try to change someone else, and give you a formation diagram and tell you to draw it as it is, which may not be easy.

"It's really not easy," Lu Yun nodded.

Now he understands the reason why there are few professionals in this formation.

Of course, there are fewer people and fewer people, once the formation can be learned well, then the future status will be great!

Not to mention the level of formation master, just a person who graduated from the formation science major, I don't know how many institutions in this sect will rush to ask for it.

It seems that it will not be difficult for me to find a job in the future......

Ahem.

Lu Yun coughed lightly, and then asked Ning Caiyun, "I don't know what Senior Sister Ning was counting just now?" Can you show me? ”

"You?" Ning Caiyun looked Lu Yun up and down again, and then said: "I'm afraid it won't work, but if you want to see it, you can watch it, this is a verification question, I actually calculated it, but I always feel that the process is too complicated, there should be a simple solution, but I can't think of anything." ”

It turned out to be a verification question.

Lu Yun immediately took the booklet and opened it, and on the cover was a row of vertical titles-

"Dialectical Diagram of Array Diagram Theory Knowledge."

That's an interesting title......

Lu Yun was very interested when he looked at it, and flipped through it casually, the whole book is a variety of angular and surface calculations, the most critical of which is actually a sentence - "The structure of the array diagram is exquisite, and the difference is thousands of miles, and no detail can be wrong, otherwise the array diagram will be invalid." ”

In fact, if you think about it, you can see that the main structure of the array diagram is actually a bit similar to the four-corner symmetrical figure on the earth's Douyin, that is, after dividing a circle from the center of the circle, each part must be completely overlapped with the others.

If there is a part that is crooked, the formation will not work.

And this kind of plane figure, especially plane symmetry figure, is naturally extremely demanding for geometry.

In this book, there are a lot of problems in geometry.

Of course, this is difficult in the eyes of others, but in Lu Yun's opinion......

Isn't this junior high school geometry?!

"This ......" Lu Yun scratched his hair: "It doesn't look very difficult...... Senior Sister Ning, which question haven't you figured out? ”

Hearing this, Ning Caiyun immediately tilted his head to look at him.

Really? Isn't that hard?

Ning Caiyun immediately pointed to him: "That's the question." ”

Lu Yun followed the position pointed by Ning Caiyun and glanced at it.

"How to prove a triangle when isosceles is equal at two base angles."

Lu Yun: "??? ”

Can this kind of thing be stumped too?

Lu Yun gasped and exclaimed, "Isn't it? You don't know such a simple question, don't you? ”

Ning Caiyun: "??? ”

Is it simple?

"Senior Brother Lu," Ning Caiyun carefully reminded, "I know that you are very knowledgeable, but the formation study is different from others, and there must be no mistake in any step." Therefore, you must not be sloppy in ordinary times, this question does not seem to be difficult, but in fact it is not so easy to prove. ”

"It's just not difficult," Lu Yun replied with a smile: "Don't worry, such a simple question, I'll see how you prove it first." ”