However, before she could finish her words, she was interrupted by a cheerful voice.

"Haha, it seems my precious daughters are very happy today.

Tell Aye quickly, is there anything good worth celebrating?"

This sound was the sound of Li Shimin and Empress Zhangsun happily stepping into this place surrounded by court attendants.

Seeing the two men coming, the women stood up and saluted, their faces filled with joyful smiles.

"Yeah! Mother! You are here!" The little princess stepped forward and affectionately took Empress Changsun's arm.

"We are exploring the microscopic world with a microscope and have made so many amazing discoveries!"

"Oh? Microscope? What is this?" Li Shimin walked to the microscope with interest and looked around with interest.

Li Lizhi explained excitedly: "Yeah, this is the microscope.

It can magnify tiny objects several times, allowing us to clearly observe the microscopic world that is usually difficult to perceive with the naked eye."

As she spoke, she instructed Li Shimin and Empress Zhangsun to observe the blood sample that was currently being placed under the microscope.

Li Shimin looked down, and when he saw the densely packed and constantly moving "little red bugs", he exclaimed in surprise, "What...what is this?"

Empress Zhangsun also showed a curious look, "Lizhi, what are these little red dots?"

Li Lizhi smiled and explained, "Yes, mother, these are the blood cells in the blood.

They are like small boats in our bodies, responsible for transporting oxygen and nutrients to every corner of the body and carrying away waste products.”

Li Shimin was incredulous after hearing this. "What? This is actually blood? There are so many little bugs hidden in our blood?!"

Obviously, Li Shimin did not understand the term "cell" and had no idea what it meant.

He still uses the word "bugs" to describe the blood cells he sees.

Li Lizhi and the other girls smiled at each other. They understood that this would require a process of adaptation and acceptance.

The little princess explained softly, “Yeah, they are not real bugs, but parts of our body called blood cells.

They are very important, providing our bodies with oxygen and nutrients. They are responsible for a large part of our survival!"

"Blood cells?!" Li Shimin widened his eyes. He looked down at the microscope again, trying to understand this new concept.

However, even for a wise and brave man like Li Shimin, it was difficult to understand this term without receiving nine years of compulsory education.

"Sizi, can you tell Yeye how these blood cells...feed us?"

The little princess nodded. She knew that this question might be difficult to understand for people without modern scientific knowledge.

But she still tried to explain it in plain language: "Yeah, every time we breathe, we inhale oxygen and exhale carbon dioxide."

"Wait!" Li Shimin called out to the little princess again, "Little Sizi, what are these oxygen and carbon dioxide?"

The little princess smiled slightly and explained patiently: "Yeah, oxygen and carbon dioxide are both gases in the air.

When we breathe, we take in oxygen, which enters our lungs and is then carried through the blood to every cell in our body.

Cells use oxygen to generate energy to keep us alive.

At the same time, this process produces carbon dioxide as a waste product, which is then carried back to the lungs through the blood and finally exhaled out of the body."

Li Shimin was completely confused. He could clearly understand every word, so why did he feel like he couldn't understand it?

After pondering it for a moment, he asked weakly, "Little Sizi, could this oxygen be the legendary spiritual energy?"

When the little princess heard this, she was stunned at first, and then she understood Li Shimin's misunderstanding.

She couldn't help laughing. "Yeah, oxygen is not spiritual energy. These are two completely different things."

“Oxygen is what we need to breathe; it’s in the air and is colorless and odorless.

As for spiritual energy, that's what cultivators call the essence of heaven and earth, a being on another level." The little princess tried her best to explain in words that Li Shimin could understand.

After hearing this, Li Shimin nodded thoughtfully, "I see. I misunderstood. Then, what is the existence of carbon dioxide?"

“Carbon dioxide is also a gas produced during our breathing, but it is not essential for our bodies.

On the contrary, if there is too much carbon dioxide in the body, it will cause harm to the body.

So, we need to expel it from the body through breathing." The little princess explained in detail.

Li Shimin listened with great interest and exclaimed, "It's amazing!

I never thought that breathing, which seems so simple in our daily lives, could actually hide such profound knowledge."

Although Li Shimin said so, he actually had no idea what oxygen and carbon dioxide were.

It can be simply understood that oxygen is a good thing and people should breathe more, while carbon dioxide is a bad thing and must be expelled in time.

The little princess continued to explain, "Cells are like small factories in our bodies.

They need oxygen to produce energy and produce carbon dioxide as a waste product. These processes are carried out by blood cells in the blood.

Blood cells are like small trucks that continuously transport oxygen to various cells and take the produced carbon dioxide back to the lungs, and then expel it from the body through breathing..."

As the little princess continued to explain, not only Li Shimin and Empress Zhangsun, but even Li Lizhi were confused.

But even so, they still forced themselves to understand, thinking that these were just the voice of the great way.

Although it is obscure and difficult to understand, it points directly to the origin of the Tao.

They believe that as long as they can understand and master this knowledge, they will be able to understand the mysteries of life like the little princess.

It is even possible to embark on the path of cultivation and explore the wider world.

However, Li Lizhi soon noticed a problem: "Sizi, didn't Xiao Rangjun say before that our bodies are made up of genes?"

"Why is it that what we observe now, and what you are describing, is all about cells?"

Upon hearing this, the little princess immediately understood Li Lizhi's doubts.

She smiled and explained, "Sister, you are right, we did hear Xiao Rangjun mention the word gene before.

But in fact, genes and cells are two different levels of concepts.”

"Oh? What are the differences and connections between them?" Li Shimin asked curiously.

The little princess thought for a moment and tried to explain in plain language: "Yes, mother, sister, you can understand it this way.

Our body is like a big country, and cells are like small villages in this country.

Every small village has many villagers, and these villagers are genes."