That night, Guo Yu had rare insomnia, and he thought about it a lot.

I want to think about how to quickly improve my physical fitness, and how to be admitted to the martial arts academy in the entrance exam three months later.

He thought of many ways, but none of them worked.

There are many ways to improve physical fitness quickly, and the most common is to take genetic drugs.

But the luxury of genetic medicine is not something their family can afford.

Guo Yu inquired about the price of genetic medicine, a genetic medicine that does not enter the stream, the market price is 1,000 galaxial coins, which is equivalent to a year's living expenses of their family.

Although Guo Yu didn't fall asleep until the dawn of the day, he woke up on time at six o'clock in the morning under the reminder of the biological clock.

"Goodbye, Mom, Dad, Xiaoya." Guo Yu waved his hand and went out.

"Goodbye, brother, be careful on the road." Guo Ya held on to the door and shouted with a wave of her hand.

The slum where he lives has facilities at least 100 years old. The streets and buildings look a little dirty and shabby.

Not far from Guo Yu's house, there is a Phil Church with a history of more than 1,000 years, which is said to be the first batch of buildings built after the Galactic Alliance occupied the Shogun.

"Good morning, Aunt Maria." Guo Yu smiled and greeted his neighbors.

"Yo, good morning, little genius." The chubby Aunt Maria was cleaning up the fallen leaves in front of the door with a broom in her hand, and she also smiled at Guo Yu.

"Uncle Tan is going to work?"

"Yes, little genius, when you have time to go back, remember to tutor my bastard boy in a number theory class." Uncle Tan, who was holding his work clothes in the distance, smiled.

Guo Yu is a celebrity near Fel's Chapel, a genius in everyone's eyes, just because Guo Yu went to the best high school in Dawning City.

……

After taking the crystal rail train into the Morning Light Zone, it is like entering another world, with towering alloy buildings and scenic botanical forests everywhere, which are perfectly combined.

On the ground, cool-looking sports cars are speeding along specific tracks.

In the sky, there are also flying cars passing quickly.

Everywhere in the Chenguang District is clean and tidy. It is in stark contrast to the dirt and dilapidation of the slums.

"There is no equality in any era, and only those who have the strength and ability can make themselves and their families live better!" Guo Yu got off at Shuguang No. 1 Middle School Station, and at this moment, the idea of changing himself became stronger and stronger.

With two hours left before the first class at half-past nine, Guo Yu turned around and walked into College Street, near the school, where he had an hour of part-time work to do.

A shop on College Street that is mainly engaged in the sales and maintenance of light brains looks inconspicuous, with an area of only more than 30 square meters, and the store name is Li Ji Light Brain.

After Guo Yu was admitted to Shuguang No. 1 Middle School, he has been working part-time here, and his specific job is to repair the optical brain.

On the counter in the shop, the light brain is neatly arranged, and there are many styles, the most common is the watch-type light brain, and there are some belt-type, head-worn and so on.

"Uncle Li, how many do you want me to fix this time?" As soon as Guo Yu entered the door, he shouted.

"There are four of them, all of them in there." Li Xing, the owner of the shop, said without raising his head.

Li Xing is a middle-aged man, extremely burly, but with thick black-framed glasses with a strong cultural temperament, this outfit feels a little strange.

Guo Yu had long been accustomed to Li Xing's speaking and dressing style, and went directly into the repair room in the store.

The repair room is a little cluttered, with a well-constructed console and scattered optical brain parts.

There are four of them that look fairly complete with a watch-style light brain.

Guo Yu was familiar with the road, sat in front of the operating table, picked up one of them, and disassembled the light brain into a pile of parts very skillfully with both hands in an orderly manner.

Then the console was put into operation, and a force directly made the pile of parts suspend in the air in a certain regular order.

Guo Yu's eyes were like torches, observing the subtleties of each part, and soon found that the position of several of the parts was abnormal, and then he quickly clicked dozens of times on the dense options on the console.

The robotic arm on the console received the command, and the light flashed continuously, and several abnormal parts were quickly repaired.

Immediately afterwards, Guo Yu quickly operated with both hands to assemble the light brain parts suspended in the air in a certain order.

"That's it!"

Subsequently, Guo Yu activated the light brain, and after checking that everything was normal, he showed a satisfied expression on his face, which was very fulfilling.

Suddenly, Guo Yu saw that the jewelry he was wearing on his left wrist was a gray bracelet, although the appearance was similar to that of a watch-type optical brain.

But Guo Yu understands that this is not a light brain, just an ornament, this gray bracelet is what he has been wearing since he was a child, according to Guo's father and Guo's mother, he will wear this bracelet until he dies, and he can't take it off.

"I don't know when I'll be able to have a light brain." Guo Yu thought to himself, but he had cultivated the light brain for three years, and he knew very well the price of the light brain, and the lowest matching light brain also cost 10,000 Galaxy coins.

And his family situation is that the annual expenses are only 1,000 Xinghe coins, and he can't afford to buy a light brain at all.

"Only the light brain can connect to the star network and contact the larger world!" Guo Yu stared at the light brain in his hand, this is the light brain that has been bound to human genes, and he has no right to use it.

These four optical brains, Guo Yu took less than an hour to repair.

Guo Yu put the four light brains back on the display shelf, and picked up a very old light brain on the top layer of the display shelf.

The appearance of this light brain is different from several common styles in existence, with nine eight-pointed stars the size of fingernails, which are linked together by a special alloy, and the standard nine-star bead style.

Of course, it is also worn on the hand.

Guo Yu has studied the history of the light brain, this kind of nine-star beaded light brain, which was common more than a thousand years ago, must be much behind in function than now, but it is better than the martial arts mecha has a high degree of fit, so it is still used by people.

There is also a problem with this light brain, it has been placed here for almost half a year, Guo Yu has to take some time to study every time he comes, and he has not yet found a solution to the problem.

This is still the case today, Guo Yu will put the nine-star light brain back on the display shelf and walk out of the repair room.

"Did you find the problem?" Li Xing asked with a little expectation.

"Still don't have a clue, this model of the light brain is too old, and its core arrays are all things I haven't seen, so I don't know where to start." Guo Yu shook his head.

"That's a pity, the guest came again last night, and she raised the fee to 20,000 Galaxy coins, but it's a pity that she only gave us half a year, and if it can't be repaired at the end of the month, this transaction will be terminated." Li Xing frowned.

Guo Yu could only smile bitterly, he also wanted to fix it, 20,000 Galaxy coins.

He only came to the store in the morning, so he had never seen the owner of the light brain, and I heard Li Xing say that it was a young lady from a rich family, and he was very obsessed with this light brain that was already very outdated.

At the beginning, the repair cost was only more than 1,000, but every half a month, the owner of the light brain would increase the repair cost, and now it has increased to 10,000 Xinghe coins.

She obviously took the route that there must be a brave man under the heavy reward, but the difficulty of repairing this light brain is too high.

The two of them have exposed the topic.

Li Xing transferred the day's salary to Guo Yu, held his glasses and said, "Guo Yu, there are still three months to take the entrance exam, right?" You must get a good score! ”

Li Xing admired Guo Yu's talent, not a martial arts talent, but a number of array talents.

In this era, there are many people who study the number array at a high level, but there are very few people who can transform their number array research into practical application, which is the so-called number array talent.

In the era when the number array has become the core of science and technology, the value of this kind of talent with the talent of the number array is particularly obvious.

Guo Yu is such a talent.

"Uncle Li, borrow your auspicious words, but this time it's really a bit hanging, I'm going to apply for a job at the research institute of TX Group this weekend." Guo Yu thanked him.

"TX Group, oh, yes, yes, then I wish you success!" Li Xing looked like he had expected it a long time ago.

Guo Yu smiled confidently, then left Li Jiguang's brain shop and rushed to the school.

He was glad he had found the part-time job.

In the past three years, this job has not only brought him a considerable income, but also allowed him to learn a lot of optical brain structure knowledge and optical brain maintenance skills, which has greatly improved the practical application of several arrays.

Because the optical brain is one of the embodiment of the perfect combination of array and industrial design.