PS: The network at home is not good yet! I had to go to my mother's house to upload it again, it's late, brothers, forgive me! The last chapter was a little anxious, and the number of chapters was wrong, I hope it won't affect the reading!

Jiang Xingchen was in a very good mood, he had reaped great benefits overseas, and the Emperor had almost solved it, and the material exploration array had developed to the calf, although the effect was not yet known, he could definitely play a huge role in the research of new materials. Now that Xian Ning told him that the process of float glass is basically solved, he can think of the situation when the whole town is replaced with glass, which will definitely make tourists dumbfounded.

Immediately, Jiang Xingchen remembered that Xian Ning said a few good news yesterday, so he couldn't wait to ask.

"Do you remember Zhou Lin?" Xian Ning asked with a smile.

"Of course I remember, the telescope was researched by him, and I asked him to continue to deepen his research when I left!" Jiang Xingchen nodded, and then asked in surprise: "It can't be that his research has made any major breakthroughs, right?"

Xian Ning said: "After you left, I specially assigned a few people to him to study together, and the result really became famous." During this period of time, they asked craftsmen to help polish the lenses every day, and finally made an instrument that can see things that are so small that they are difficult to see with the naked eye!"

After a pause, Xian Ning said solemnly: "Xingchen, when we chatted before, you once said that the microcosm is more mysterious than the world seen with the naked eye, and that is the direction of our research." At the time I thought it was incredible, but now ...... I believe it!"

Jiang Xingchen didn't speak, he was also shocked, if Xian Ning's description was not wrong. Zhou Lin's team should have studied a microscope, but he really didn't expect it.

"Microscope! This is a necessary instrument for the development of biology!" Jiang Xingchen originally planned to make a microscope in the near future, but he didn't expect Zhou Lin to succeed. With this thing. Medicine, animals, plants, and these studies will all develop rapidly.

"There's another good news!" Just as Jiang Xingchen was still immersed in the joy of the appearance of the microscope, Xian Ning asked again.

"Oh, and?" Jiang Xingchen asked in surprise as he came back from his joy.

"Of course, didn't I tell you a few good news, this is the second one!" Xian Ning smiled.

"Yes, yes! Look at my brain. What other good news is there for the happy microscope?" Jiang Xingchen patted his forehead.

"Microscope? that's a fitting name...... The last good news is actually you can figure it out yourself, didn't you see that I brought Nier with me?" Xian Ning stretched out her hand and dragged the little girl to her.

"Nier?" Jiang Xingchen thought for a moment. Suddenly, his eyes widened: "Nier, have you solved the problem I left?"

Jiang Xingchen almost shouted this sentence, and the shock in his heart was incomprehensible, and Xian Ning and they might not understand. It may not feel anything. Jiang Xingchen himself knew that the problems he left behind had lasted for thousands of years in his previous life, and he had stumped countless mathematicians! And she's only how old she is, only thirteen.

"Could it be that this is the legendary genius!" Jiang Xingchen said secretly. In my last life, I had heard of countless geniuses, and it was not uncommon for those teenagers to complete high school at the age of twelve. But compared to the little girl in front of him, it is definitely not enough to see.

Jiang Xingchen, a genius in this world, has also seen a lot, Tang Chuxue. Catwoman, Mei'er!, but they are all gifted in martial arts. In Jiang Xingchen's eyes, no one can compare to Nier. If you want to solve the three major problems of ancient times, you must finally rely on the coordinate system and use algebraic methods to solve geometric problems. The emergence of the coordinate system not only closely links algebra and geometry, but also makes the study of functional variables meaningful, which is an important step in the emergence of calculus in the future!

So, Nill is the real genius. If she is able to study the coordinate system by herself, she will be able to continue to develop backwards and gradually systematize and complete the mathematical system! This is a great contribution to the whole world.

"Sir, you...... It's okay!" Nier stretched out her little hand and shook it in front of Jiang Xingchen's eyes, the lord's expression was too rich, and she was a little worried.

"It's okay, it's okay!" Jiang Xingchen hurriedly shook his head and asked, "How did you come up with it?"

Niel replied, "The two questions left by the lord look simple, but I have solved them for a year without results, and I feel very annoyed, so I come out to relax." As a result, I saw a few children from the village playing at the foot of the back mountain, and they drew a horizontal line under a tree, and several people jumped along this horizontal line to see who could jump over the line segment in the shortest number of times!"

Speaking of this, Niel laughed happily: "When I saw this scene, I suddenly thought of the number line! There are also two children competing to climb a tree to see who is faster, and they will jump up one by one." It feels like a vertical number line!"

Jiang Xingchen also smiled, and a flash of inspiration was like Newton who saw the apple fall in his previous life. Sure enough, it's a genius!

He didn't expect Niel to be able to figure it out, but he was just going to practice her and tell her the result at the end. But now, in the future, there is basically no need to interfere in the development of mathematics, at most two sentences, the little girl can definitely do it herself.

"Come, tell me how you solved it in the end and what conclusions you came to in the end!" Jiang Xingchen beckoned to the little girl and ordered someone to bring a pen and paper.

Nier moved to Jiang Xingchen's side, picked up a pen and paper and began to write, and Xian Ning watched with a smile.

"You see, sir, any point can find the corresponding real number, and a straight line can be represented by a primary equation in a coordinate system, and the same is true for a circle, but it is a quadratic equation. Their intersection ......"

Nier explained step by step, and Jiang Xingchen found that the solution was exactly the same as the one he saw in his previous life.

In this way, the question of whether a geometric quantity can be made with a ruler can be found by the algebraic problems of addition, subtraction, multiplication, division, and square...... After calculation, these two problems are simply impossible to solve with the ruler method!"

Finally, Niel raised her head and asked, "Sir, is my solution correct?"

"That's right, you're doing exactly that!" Jiang Xingchen nodded vigorously, raised his hand to rub Nier's hair, and said, "Give you a reward, what you want to eat, the lord will personally cook it for you today!" He was really relieved now.

The little girl laughed happily, and then whispered, "I want to eat the full Han banquet!"

"Ahem, cough, cough......" Jiang Xingchen didn't come up in one breath, choking and coughing, this girl's black belly still hasn't changed!

"Flutter!" Xian Ning next to him couldn't hold back and laughed out loud. The more she looks at Nier now, the more she likes it, and she thinks about whether she will let her take over her class in the future!

"What do I do, what do you eat, the qualification to order food is deprived!" Jiang Xingchen knocked Nier lightly.

"Hee-hee, I love to eat whatever you do!" the little girl giggled.

"Let's go!" Jiang Xingchen stood up and said, "Go to the research institute and take a look at the microscope that Zhou Lin has made up, and there are other things to give to Nier!"

The three of them went out together, and just two steps away from the lord's mansion, they saw the little cat woman running over from a distance, looking anxious.

Seeing Jiang Xingchen and the three of them at a glance, the little cat girl shouted: "Brother Xingchen, come and see, what's wrong with the spirits?"

"What?" Jiang Xingchen was startled, something happened to the spirits, could it be that there was a powerful demon beast in the territory again.

"What's wrong, are you hurt?" he hurriedly asked.

"I'm not hurt, but it looks very strange, I don't know, you can go and take a look!" The little cat girl ran to the front and grabbed Jiang Xingchen.

By this time, Niel had already been the first to run forward. She was nervous about these demon beasts in the territory, and when she heard that something had happened to the spirits, she was more anxious than Jiang Xingchen.

Hearing the little cat woman say this, Jiang Xingchen breathed a sigh of relief, what he was most afraid of was that the demon beast would come and hurt the tourists, and it would be a big trouble.

"Xian Ning, go back first, I'll go with Xiao Xiang to have a look, and then I'll go to the research institute later!" said in his mouth, he had been pulled away by Xiao Xiang.

Xian Ning also knew that his physique was not good, and he couldn't help anything in the past, so he said that you should be careful, and let the private soldiers escort him back to the research institute.

The little cat woman took Jiang Xingchen with her, and after catching up with Nier, she also set her up, and ran quickly towards the back mountain.

When they reached the top of the back mountain, they saw the spirits. At this moment, the spirit of the liquor was indeed very strange, constantly rubbing his face against the ground, and after a while he fell down and twisted his body, and then stretched out his claws to knock a stone away, and then ran after it, and then ran back to rub the ground.

"Brother Xingchen, look, I just came over and saw that the liquor is like this, is it sick with something?" asked the little catwoman anxiously.

"What's wrong with the spirits?" said Nile as her eyes turned red as she raised her leg to pass.

"Nier, don't move!" the little catwoman grabbed her, now that the spirits are so strange, who knows if it will hurt anyone.

Jiang Xingchen stared at the cats for a moment, and his brows furrowed: "How do you look at it...... It's like eating catnip!"

In his previous life, he had seen a cat eat or smell catnip, and the reaction was similar to that of the current state of the spirits! If it was true, it was not the liquor abnormality, but the excitement of the goods!

"Brother Xingchen, you are talking, what's wrong with the spirits?" The little cat girl shook Jiang Xingchen's arm.

Jiang Xingchen waved his hand, did not answer, his eyes wandered around the spirit, and soon found a green leaf.

"Sure enough!" Jiang Xingchen strode over, but the little cat girl didn't catch it, and hurriedly ran forward, afraid that the liquor would hurt Jiang Xingchen.

But when she grabbed Jiang Xingchen, Jiang Xingchen also went to the side of the spirits and bent down to pick up the green leaf.

As soon as he picked up the leaf, the liquor pounced on his lap and jumped on his shoulder with two clicks. Catwoman was so frightened that her heart was about to jump out, and she raised her hand to slap the spirit.

At this time, Jiang Xingchen sent the green leaves in his hand to his shoulder. Spirits immediately began to rub his face against the leaf, his eyes narrowing.

The little cat woman was relieved to see this, and lowered her raised palm again.

"Sir, what is this leaf, spirits it...... It can't be poisoning, right?" asked Niel, with red eyes.

"It's all right! It's called catnip, and it's good for spirits...... But where did this thing come from?" (to be continued......)