Love Guide for Childhood Sweethearts

"That's right, teaching the apprentice will starve the master to death." Lin Jingzhe pouted and muttered, his feet gently tapping the water. "We are all competitors." He said slyly, "If they really come, wouldn't they be selling out their country?"

"What are you talking about?" Zhu Youlin looked at her amusedly and said, "Not really! You're climbing such a high altitude, are you trying to scare people to death?" Then she laughed and said, "Aren't all football coaches from their own country? Sports have no borders! They promote the spirit of struggle."

"Ahem..." Lin Jingzhe coughed in shock. He took a deep breath and held it, stopping the cough. He rubbed his nose with his index finger and said, "Sports have no national boundaries, but athletes have their motherland." He lowered his voice and added, "Those scoring events are blatantly trying to suppress our scores." He shook his head gently and said slowly, "I wonder if this has something to do with politics?"

Zhu Youlin was speechless. She opened and closed her mouth for a long time but couldn't utter a single word.

"Like swimming, you can win by only surpassing him by half a body length. It requires absolute strength! If you reach the wall at the same time, without a high-speed camera, you will be hacked without a doubt." Lin Jingzhe looked at her with his glassy blue eyes and said word by word.

Zhu Youlin has seen too much while competing on the track.

"I can't refute that." Zhu Youlin took a deep breath, looking at her with her bottomless black eyes. "Sports do have national boundaries." She placed her index finger on her lips and said, "But don't say this out loud. Just understand it." She sighed softly and said, "Also remember: participation is the most important thing!"

"Yeah!" Lin Jingzhe smiled and nodded at her.

"There's a huge gap between us and foreign countries!" Zhu Youlin said, looking at her deeply.

"Are we that bad?" Lin Jingzhe looked at her with his peach blossom eyes and said, "Didn't you win the Olympic gold medal?"

"One or two pieces, very rare, pitifully little." Zhu Youlin sneered and said unwillingly.

"Then just practice! Complaining is useless." Lin Jingzhe looked at her calmly and said.

"We..." Zhu Youlin thought for a moment and looked at her with dark eyes. "How should I put it? In addition to training equipment, they also have high technology."

"High-tech?" Lin Jingzhe blinked his clear eyes and looked at her doubtfully, "Specifically?"

"On the swimsuit." Zhu Youlin looked at her with clear eyes and said.

"Shark skin." Lin Jingzhe blew up the half-dry bangs on his forehead and said.

"Yes! During the Sydney Olympics, Australian athletes wore sharkskin swimsuits and they were like sharks advancing in the blue waves, cutting through the waves. They won three gold medals, and the sharkskin swimsuit has become famous in the swimming world ever since." Zhu Youlin said, looking at her with green eyes.

"As for what kind of swimsuit can help us swim faster, I believe we have been exploring for many years!" Lin Jingzhe said, looking at her with eyes as clear as amber.

"Yeah! It's not as good as the research in Europe and America. Sharkskin swimsuits are really good," Zhu Youlin said, her mouth watering. "The resistance a swimmer encounters in water is proportional to the water's density, the swimmer's frontal area, the coefficient of friction, and the square of the swimmer's speed. Therefore, reducing the frontal area and the coefficient of friction is the key to designing a resistance swimsuit."

"Then our friction coefficient must be small, especially when we are naked." Lin Jingzhe looked at her with a smile in his peach blossom eyes and said with a sly grin.

"Ahem..." Zhu Youlin was so shocked that she kept coughing. "What are you talking about?"

"What's wrong?" Lin Jingzhe pointed at his bare legs and said, "Look, there's not much leg hair at all. It's nothing like the apes in Europe and America who haven't degenerated and have thick hair all over their bodies."

Zhu Youlin looked at her in astonishment, without blinking.

"Why are you looking at me? I was wrong, wasn't I?" Lin Jingzhe looked at her with his dazzling eyes and said, "There's a lot of hair on your chest, legs, and arms."

"All the hair has been shaved off." Zhu Youlin reminded her.

Lin Jingzhe turned his head and looked at her with a burning gaze. "Have you seen foreign athletes? They have abundant body hair. Even after they shed their hair, their pores are still particularly large."

"Hmm! Men and women have larger pores than us." Zhu Youlin's eyes widened. "No wonder they have to cover themselves in sharkskin swimsuits. This must reduce friction."

"What are the characteristics of this shark skin swimsuit?" Lin Jingzhe asked her with his sparkling peach blossom eyes.

"Sharkskin swimsuits, as the name suggests, mimic shark skin. The rough V-shaped wrinkles on shark skin's surface can greatly reduce friction, allowing water to flow more efficiently around the body, allowing the shark to move quickly." Zhu Youlin looked at her with calm eyes and continued, "Sharkskin swimsuits fully integrate the principles of bionics. The seams mimic human tendons, providing power for athletes when paddling backwards. The fabric also mimics human skin, making it elastic and reducing water resistance."

Lin Jingzhe poked the skin on his thigh and asked, "Is that so?"

"Our skin does have advantages over white people in Europe and America, but this swimsuit can increase buoyancy." Zhu Youlin looked at her with deep, clear black eyes and thought seriously, "We can try it out and compare the data."

"Won't we buy it? Aren't they doing this research just to make money?" Lin Jingzhe snorted.

"Seven thousand yuan for a swimsuit." Zhu Youlin exclaimed.

"How much?" Zina asked as she swam over.

"Seven thousand." Zhu Youlin opened her red lips and uttered two words.

"Gudong..." Zina sank to the bottom of the water.

"Hey, hey!" Lin Jingzhe was frightened and reached out to grab Zina.

"Splash..." Zina burst out of the water, "Oh my God! That's so expensive."

"I was really scared to death by you." Lin Jingzhe patted his chest and said to the frightened guy.

"What are we doing here? How can we possibly drown?" Zina grinned.

"Have you never heard of a person who is good at swimming drowning?" Lin Jingzhe looked at her unhappily and said.

"I'm sorry!" Zina said apologetically while lying on the edge of the swimming pool and looking at her.

"Don't get too excited next time." Lin Jingzhe looked at her with his amber eyes.

"I'm not excited, the price is just too scary." Zina swallowed and looked at her.

"I want to tell you that this shark skin swimsuit can only be worn six times." Zhu Youlin said to them with deep eyes.

"What!" Zina exclaimed, leaning back onto the water. "Oh my god!"

"You heard it right." Zhu Youlin looked at her with eyes that were so deep that they could not see into the ground.

Ye Zhenzhen, who had swam over, couldn't help but exclaim, "This is a bit too extravagant for us!"

"Yes! It's a bit of a heavy burden for us." Zhu Youlin said as she looked at them with a frown.

"This shark skin swimsuit is so good." Lian Ximei looked at her with clear eyes and said.