Living in an apartment: Only children make choices.

"Is this just starting to become popular?"

Hu Yifei said, puzzled.

"how?"

"Did you already know?"

Lin Yun nodded and said.

"Well, almost."

Lu Zhanbo also said with a smile.

"Sis, this is really nothing magical."

"I have learned about similar experiments before."

"There should be solid sodium acetate trihydrate in this cup."

"When shaken by external force, it will absorb heat and melt into a sodium acetate solution. If it contains cold water, it will also release heat."

"The melting point of sodium acetate trihydrate is 58 degrees Celsius, and the water temperature after shaking can be controlled at this temperature."

Upon seeing the bewildered Hu Yifei, Lu Zhanbo tentatively inquired.

"Sis, you don't know this principle, do you?"

Hu Yifei said with a dark face.

"I know nothing, I'm a liberal arts student."

"I was having a great time, but what you said has suddenly made everything ordinary!"

Lu Zhanbo hurriedly explained.

"You can't really blame me!"

“Even if you don’t say it, my brother-in-law will definitely have to explain it to you.”

"Brother-in-law, do you also know how this cup works?"

Lin Yun paused for a moment, then quickly replied.

"Know!"

"Of course I know!"

"Didn't I say that I've known about this thing for a long time?"

"It can only hold 200 ml of water at a time, which isn't very practical."

Hu Yifei simply left, saying, "I didn't say it was for you guys!" and turned to leave...

Chapter 1929 Flirting (Please Subscribe!)

"This cup is amazing."

"When your stomach is upset, just add hot water, shake it, and you can drink it."

"If you want to drink more, you can add cold water after you finish drinking it, and it will become hot water again."

Zheng Ziyan said with delight.

"Is this cup really that amazing?"

Lin Yun said with a smile.

"Actually, the principle is very simple, it's just..."

Lin Yun simply repeated what Lu Zhanbo had said.

Zheng Ziyan said in shock.

"Honey, you're so amazing!"

"You know a lot."

Lin Yun said with a smile.

"I read a lot of books, so I have a lot of knowledge."

"Your period should be due soon, right?"

"With this, you can make brown sugar water by yourself even when I'm not around."

Zheng Ziyan nodded happily, then suddenly said.

"and many more!"

How did you know when my period is?

"You investigated me?"

Lin Yun sighed and said.

"First of all, there are about thirty days in a month."

“We’ve been together since you came back at the beginning of the month, and it’s been almost a month now.”

"It's a process of elimination; your period should be starting soon."

"Could it be that you are Ji Jing or An Jing?"

Zheng Ziyan nodded in sudden realization.

"Impressive, you've thought of things very thoroughly."

"One last question, I understand Ji Jing, but what is the Dark Scripture?"

Lin Yun began to explain.

"The Dark Scripture is incredibly powerful."

"Hidden menstruation means that a girl will never have a period in her life, but she can get pregnant normally and all her physical characteristics are normal."

"As for how rare they are, I only know one girl like that."

"But she still died later."

Zheng Ziyan asked curiously.

"Is there still a problem with your health?"

Lin Yun shook his head and said.

"No, he died suddenly from playing games."

"As for the real cause of death, I don't know."

"I can't believe it," Zheng Ziyan said regretfully.

"Pity!"

"But this secret scripture is really good; it saves me a lot of suffering!"

"It's all beneficial and without any harm!"

Lin Yun calmly explained.

"Actually, it is still harmful."

"For example, she can't tell if she's pregnant by checking her menstrual cycle."

"If you take medicine for a cold, or drink alcohol during pregnancy..."

The analysis was so rational that Zheng Ziyan felt that Lin Yun's words made sense.

Zheng Ziyan stood up and said.

"Okay, you guessed right, I am indeed on my period today."

What would you like to drink?

"Cocktail, or neat?"

Lin Yun said, his eyes wide.

"No way, you're planning to drink?"

Zheng Ziyan waved her hand and said.

"How could that be!"

"I know that you shouldn't touch cold things during your period."

"So, I specially prepared yellow wine to drink while it's hot!"

"Would you like to have a drink together?"

Lin Yun sighed and said.

"Your drinking capacity, combined with your behavior, perfectly validates the previous statement."

"He's good at cooking, but he also loves to play."

Zheng Ziyan rolled her eyes.

"My alcohol tolerance is already quite good."

"It's just that your alcohol tolerance is really too high!"

"How could a normal person drink as much as you?"

Lin Yun said slowly and deliberately.

"Alcohol tolerance is a combination of talent and hard work."

The next moment, Zheng Ziyan suddenly sat on Lin Yun's lap and said in a soft, sweet voice.

"Let me see how talented you are."

Seeing Lin Yun's expression, Zheng Ziyan smiled and said while giving Lin Yun a massage.

"Don't just stand there, answer me!"

Statistics show that women experience a surge in hormone secretion during their menstrual period.