My IQ has been increasing year by year.

It's 7:30 in the morning.

At the entrance of Yuhong Primary School.

The convenience store at the school gate is always the noisiest place in the world.

The aroma of deep-fried radish cakes, the sizzling sound of grilled sausages, and the overpowering artificial flavor of cheap spicy strips, mixed with the noisy chatter of hundreds of elementary school students, created a vivid scene reminiscent of a bygone era.

Chen Zhuo, carrying his enormous backpack and clutching a bag of milk powder that cost one yuan, walked expressionlessly through the crowd.

He is feeling very unwell right now.

The aftereffects of my morning run are starting to show.

His thigh muscles ached as if he had been beaten up, and he had to grimace with every step he took. Moreover, due to low blood sugar, he felt like there were always black dots floating in front of his eyes.

"Get out of the way! Don't block the way!"

A series of hurried footsteps came from behind, followed by a heavy backpack slamming into Chen Zhuo's shoulder.

Chen Zhuo was knocked so hard that he almost squeezed out the milk in his hand.

He adjusted his glasses and turned around.

A chubby figure rushed into the classroom like a little tank.

That's Zhang Qiang.

Chen Zhuo's deskmate, the sports committee member of Class 3, Grade 4, is also a well-known tycoon in the class.

At this moment, Zhang Qiang had completely lost his former arrogant demeanor.

He was covered in sweat, his school uniform collar was askew, and he was clutching a brightly colored box tightly in his hand. His face was full of anxiety and urgency.

Chen Zhuo glanced at the box.

It features two exaggeratedly designed race cars and four large gold-plated characters: "Let's & Go!!".

That was a nuclear bomb dropped by Audi Double Diamond this spring.

With the popularity of the animated series, four-wheel drive cars swept through elementary schools across the country overnight.

This is not a toy.

For boys born in 2000, this was faith, a totem, and the sole standard for testing friendship and status.

Owning a genuine Cyclone Sprinter or Devil Commander makes you the king of your class.

If you could also equip it with a dragon head and phoenix tail, sponge tires, and that legendary Golden Super Motor, then you would be a god.

Zhang Qiang clearly wants to be a god.

But his current expression makes him look more like a gambler on the verge of bankruptcy.

Chen Zhuo walked into the classroom and had just sat down when he saw Zhang Qiang stuff his schoolbag into the desk drawer, then impatiently open the box and pour out a bunch of colorful plastic parts.

That was a "jumbo" vehicle.

The car used by the main villain in the cartoon is known for its front-mounted motor and heavy-duty attack power capable of crushing opponent's vehicles.

It perfectly matches Zhang Qiang's aesthetic:

Big, strong, and intimidating to look at.

"Zhang Qiang, you bought a new car again?"

The boy at the table in front of me turned around, looking envious. "That must cost over twenty yuan, right?"

"Twenty-five!" Zhang Qiang said without looking up as he clumsily assembled the parts. "That's nothing, see this?"

He mysteriously pulled a shiny motor out of his pocket.

The motor's back cover is red.

"Atomic fission?" the student in front of me exclaimed. "Thirty yuan for one of these! Are you crazy?"

"Tch, you can't catch a wolf without risking your cub."

Zhang Qiang snorted, a desperate, fierce glint appearing on his fat face.

"During today's long break, I'm going to have a showdown with Zhao Lei from Class 6(2). I lost to him last time because my triangular arrow motor was no good. This time I've switched to a giant one with atomic fission, and I refuse to believe I can't crush him!"

Chen Zhuo silently sipped his milk beside him.

He glanced at the so-called atomic fission motor.

The workmanship is rough, the heat dissipation holes are too large, and the coil is wound quite full, but the copper wire is dark in color, which is obviously a low-quality alloy with low copper content.

A typical Lida brick flying type product.

The rotation speed may be very high, and the power consumption is also astonishing.

Chen Zhuo withdrew his gaze and took out a book, "Introduction to Geometric Auxiliary Lines," from his bag.

He wasn't interested in those little children's plastic toys.

His mind is now completely occupied with how to use the congruence of triangles to solve a geometry problem he couldn't figure out last night.

Since abandoning physics experiments and turning to pure mathematics, he has found the world to be much quieter.

Mathematics is so great.

No need to spend money on a motor, no need to compete with others in speed, all you need is a pen and a piece of paper to build a perfect world.

In this world, there is no friction, no air resistance, no damn gravity; everything is ideal and eternal.

"Click."

A crisp sound.

Zhang Qiang used too much force and broke one of the chassis clips of the "jumbo".

"Grass!"

Zhang Qiang cursed, his face turning red with anxiety, and immediately pulled out some super glue to smear it on.

The pungent smell of glue wafted over, interrupting Chen Zhuo's train of thought.

Chen Zhuo frowned and moved to the side.

"Prodigy, move aside, don't get in my way." Zhang Qiang nudged Chen Zhuo with his elbow, pushing him into a corner. "Today's match is crucial for me. If I lose, I'll lose all my allowance for the month."

Chen Zhuo sighed.

"If you keep pretending like that, you'll lose."

Chen Zhuo suddenly said something.

Zhang Qiang was stunned; the glue in his hand almost stuck to his skin.

He stared at Chen Zhuo with his round eyes: "What did you say? Are you cursing me?"

"I'm not cursing you."

Chen Zhuo adjusted his glasses, pointed to the newly glued chassis, and then to the bright red motor.

"Your car has too high a center of gravity and too stiff a chassis. The atomic fission speed is too fast, and the torque is very high at the moment of starting."

Before you've even run three meters, the car will fly off.

"You don't know anything!"

Zhang Qiang, enraged, retorted, "You bookworm, have you ever driven a four-wheel drive car? This is a 'jumbo'! Front-mounted motor! It was bought specifically for stability! You see it in cartoons..."

"The cartoon is fake," Chen Zhuo calmly interrupted him. "The physics is real."

"Get out of here, go read your book."

Zhang Qiang ignored him and continued to work hard.

He piled all the available parts onto the car: an aluminum alloy headgear, a double-layered tailgate, and that incredibly heavy metal guide wheel.

He believed that as long as he assembled the vehicle to look like a tank, he would definitely win.

Chen Zhu shook his head and said nothing more.

It's hard to reason with a damned devil.

……

10:00 AM, during the long break between classes.

The cement pool table in the corner of the playground was surrounded by layers of people.

This is the "underground racetrack" of Yuhong Elementary School.

Although they don't have those expensive professional tracks, children have boundless wisdom.

They pieced together a few long planks to form a straight road and cut open old plastic water pipes to make curves. Although rudimentary, it was enough to get the four-wheel drive vehicles moving.

In the center of the crowd, the atmosphere was tense and ready to fight.

Zhang Qiang squatted on the ground, covered in sweat, the "jumbo" in his hand buzzing.

Opposite him was a tall boy named Zhao Lei, wearing a sixth-grade school uniform.

Zhao Lei is holding a "Speed ​​Axe".

But this car has clearly been heavily modified.

The car body was largely hollowed out, the tires were ground very thin, and there were a few inconspicuous pieces of tape on the chassis.

"Ready? Fatty?"

Zhao Lei said with a scornful look, "If I lose this time, your Dragon Ball manga will be mine."

"Enough talk! Come on!"

Zhang Qiang gritted his teeth and turned on the switch.

"Buzz—!!!"

The atomic fission motor emitted a terrifying howl, a violent release of power at 30,000 revolutions per minute.

In comparison, Zhao Lei's car was much higher-pitched, like the buzzing of a mosquito.

"3, 2, 1, Release!"

Release both hands at the same time.

"Whoosh!"

Zhang Qiang's "jumbo" was like a mad bull, launching itself out in an instant.

It must be said that the engine of atomic fission is indeed powerful.

In the first two meters of the straight section, it did indeed take a half-car lead thanks to its brute force.

The fourth-grade students watching cheered, "Brother Qiang is awesome!"

Zhang Qiang's face lit up with ecstasy.

However, at the end of the straight road is a sharp 90-degree bend.

This bend is made by splicing together half of a PVC water pipe, without any cushioning, resulting in an extremely low coefficient of friction.

"It's over."

Standing on the periphery of the crowd, Chen Zhuo, who had been forcibly dragged there to cheer, silently recited a phrase in his heart.

next second.

The unstoppable "jumbo" showed no signs of slowing down or gaining traction the moment it entered the curve.

It still maintains the inertia of a straight line.

The immense centrifugal force instantly overcame the meager grip.

"Snapped!"

A crisp sound.

The "jumbo" didn't turn; instead, it crashed through the bricks that served as a guardrail like a cannonball and flew off the track.

It tumbled twice in the air before crashing heavily onto the concrete.

Parts were scattered everywhere.

The battery rolled out, the chassis that had just been glued back together broke again, and the proud atomic fission motor emitted a wisp of blue smoke.

The entire room fell silent.

Only Zhao Lei's "Speed ​​Axe" skidded along the inner wall of the curve like a nimble snake, then smoothly reached the finish line.

"Hahaha! This is your behemoth? It looks like a catapult!"

Zhao Lei's unrestrained laughter echoed across the playground.

Zhang Qiang stood there blankly, staring at the wreckage on the ground, his face turning a deep purplish-red.

His lips trembled, and tears welled up in his eyes, but he stubbornly held them back.

Lost.

Not only did he lose the comic book and his allowance, but more importantly, he lost face in front of so many people in the whole school.

This was a devastating blow to a ten-year-old boy.

The crowd gradually dispersed.

Everyone looked at Zhang Qiang with pity, and even a hint of schadenfreude.

"Let's go, let's go. That fat guy is just stupid and rich."

"What atomic fission? It's not even as good as the cheap knock-off I bought for five dollars."

Zhang Qiang squatted down and silently picked up the broken pieces from the ground.

His hands were trembling, and because he was fat, the flesh on his stomach was squeezed together when he squatted, making him look particularly disheveled.

A thin hand reached out and picked up the two fallen Superpower batteries for him.

Zhang Qiang looked up and saw Chen Zhuo.

"You want to laugh at me, huh?" Zhang Qiang sniffed, his voice trembling with tears. "Get lost."

Chen Zhuo did not leave.

He wiped the battery on his school uniform and handed it to Zhang Qiang.

"Do we still want to compete?" Chen Zhuo asked.

"What the hell are you talking about! The car's all smashed!" Zhang Qiang threw the junk in his hand to the ground, finally bursting into tears. "I'm not playing anymore! This piece of junk is a rip-off! I'm going home to tell my mom!"

"A broken car can be repaired."

Chen Zhuo squatted down next to him, his voice calm, even somewhat indifferent.

"But if you don't know why you lost, no matter how expensive the motor you buy, you'll still lose next time."

Zhang Qiang was stunned. With snot hanging from his nose, he looked at Chen Zhuo and asked, "You knew?"

Chen Zhuo picked up the broken chassis from the ground, and then picked up a small piece of lead weight that Zhao Lei had left behind.

"That sixth grader, his car was lighter than yours, and his engine was slower, but he still won."

Chen Zhuo took the chassis and drew a shape on the dusty cement floor.

This is not a circuit diagram.

It is an inverted triangle.

"This is your car." Chen Zhuo pointed to the inverted triangle shape. "It's wide at the top and narrow at the bottom. The center of gravity is too high."

He then drew a flat isosceles trapezoid.

"This is his car. The center of gravity is on the ground."

"Besides, your gear ratio is wrong."

Chen Zhuo pointed to the still-smoking motor.

"Using a 3.5:1 high-speed gear with a high-speed motor is like riding a bicycle and having to put it in the highest gear when going uphill. It's powerful, but you can't control it at all."

Zhang Qiang was completely confused.

What's center of gravity? What's gear ratio? Aren't these just terms from books? What do they have to do with cars?

"Then... what should we do?" Zhang Qiang asked instinctively.

Chen Zhuo stood up and dusted off his hands.

He can't fix the car with his hands now, but he has his brain.

He can be the "brain" of this machine.

"Want to win it back?" Chen Zhuo looked down at Zhang Qiang.

Zhang Qiang nodded vigorously: "Yes! I dream about it!"

"Then listen to me."

Chen Zhuo pushed up his glasses, the lenses reflecting a sharp glint in the sunlight.

"Go to the convenience store and buy a file, a roll of tape, and... two cartons of milk."

"Milk?" Zhang Qiang was dumbfounded.

"Hmm." Chen Zhuo touched his thigh muscles, which were still aching slightly.

"That's my consultation fee."