Vigour

Facing his father's eyes full of child - like curiosity for knowledge, Su Hao didn't play any tricks and directly gave the answer: "A blind person!"

"Why can't a blind person see a doctor?" Wu Yuntian looked puzzled.

"Because a blind person can't see, so naturally they can't'see' a doctor," Su Hao explained helplessly.

After hearing this, Wu Yuntian remained silent for a long time.

Su Hao couldn't help but worry whether his father was suspecting that he himself was an idiot.

...

Wu Yuntian and Su Hao sat cross - legged facing each other, a big one and a small one, in sharp contrast.

After thinking for a while, Wu Yuntian slowly said, "If you want to learn martial arts, you first need to understand what martial arts is. In the next six months, I will gradually teach you the fundamental principles of martial arts. After you have a good command of your body, we will start the training."

"Human beings are different from ferocious beasts. The strength of ferocious beasts is their inborn talent, an instinct. But the strength of the human race doesn't come from that. The strength of the human race depends on wisdom. Our human ancestors, in the long struggle with ferocious beasts, discovered the secret of the ferocious beasts' strength, which is blood - qi. So the ancestors developed various methods of blood - qi training, enabling the human race to have the strength to confront ferocious beasts head - on. These methods of blood - qi training are what we call blood - qi secrets or blood - qi manuals. Their functions are mostly the same with little difference."

"As for what blood - qi is..." At this point, Wu Yuntian paused and looked at Su Hao, who was listening intently, as if considering whether his young son could understand this.

At this time, Su Hao looked up and asked, "What is blood - qi?"

Wu Yuntian smiled self - deprecatingly, and without hesitation, he said, "Xiangwu, lift your hand."

Su Hao did as he was told and lifted his hand.

Wu Yuntian asked again, "Tell me, why can you lift your hand?"

Su Hao answered without hesitation, "Because the muscles in my arm contract and then pull the forearm, so the hand is lifted."

Wu Yuntian didn't ask how Su Hao knew this but continued to ask, "Why can the muscles contract?"

An article describing muscle contraction was immediately searched automatically in the Marble Space. But Su Hao knew this wasn't what his father was asking. He said uncertainly, "Because there is energy in the muscles?"

Wu Yuntian nodded in approval of Su Hao's understanding of the concept of energy and said, "That's right. Not only are there energy in the muscles, but every part of our body has energy. Relying on this energy, we can walk, jump, and grasp."

As he spoke, Wu Yuntian pointed to a basketball - sized stone in the distance and said, "Xiangwu, go and bring that stone here."

When Su Hao saw it, his eyelids twitched. Looking at his thin arms and legs, he wasn't sure if he could move it. But he didn't say anything. He got up and trotted to the big stone. He first tried to lift it up, but failed. Then he walked behind the big stone, used both hands to lift the stone with all his might, and finally pushed the stone and rolled it to his father's side.

Wu Yuntian then asked Su Hao to sit down. He casually picked up the stone, tossed it in his hand, and asked, "Is the stone heavy?"

Su Hao looked at his father's thick arms enviously and answered honestly, "Yes, it's heavy."

"It's very heavy for you and you can't lift it, but for me, it's very light," Wu Yuntian said. As he spoke, he threw the stone, and it drew an arc and rolled back to its original position. Then he asked, "Why?"

Su Hao was suddenly extremely speechless. He had rolled the stone all the way over here, thinking it had some special use, but now his father just threw it back? If he wanted to ask, why make him do this useless work?

Helpless, Su Hao could only answer obediently according to the train of thought, "Because my arm strength is small, and father's arm strength is large. It's equivalent to my arm having less energy, and father's arm having more energy."

He didn't mention the factor of age because he knew that wasn't what his father was asking.

Wu Yuntian nodded and said, "That's right. Because there is more energy in my arm, while there is less energy in your arm. So, the energy we mentioned, let's give it a name, blood - qi. We can say that the blood - qi in the arm allows you to lift the stone. The stronger the blood - qi, the heavier the stone you can lift."

"Right," Su Hao nodded to show his understanding.

At this time, Wu Yuntian finally showed a smile, a smile that Su Hao rarely saw. Then he said, "Now that you understand this, let's get to the point."

After a pause, Wu Yuntian said, "The so - called blood - qi training method is essentially a way to increase the energy in the body. The more blood - qi energy accumulated in the body, the stronger the martial artist becomes. When the energy in the body reaches a certain level, one can even shatter a mountain with a single punch."

Isn't that like a nuclear bomb? Su Hao looked at his father in shock and asked, "Father, have you seen such a martial artist?"

Unexpectedly, Wu Yuntian shook his head and said, "No, it's just a legend."

Seeing Su Hao's disappointed face, he explained, "I just want to tell you that humans have the opportunity to reach such a level through training. It is said that the most powerful ancestor - master - level martial artists can do it."

Su Hao just nodded. Wu Yuntian asked again, "So, Xiangwu, one last question. We do a lot of exercise every day. Where does the energy for exercise come from?"

Su Hao answered quickly, "Food!"

"Right!" Wu Yuntian nodded and explained, "We eat a lot of food every day and obtain energy by converting the food. So, Xiangwu, eat more in the future."

Wu Yuntian was uncharacteristically gentle and said, "Xiangwu, you're the smartest child I've ever seen. Even at the age of six when starting to learn martial arts, not everyone can understand these principles from the beginning. I hope you can really become a powerful martial artist of the human race in the future! I hope you... can break the shackles of the martial artist's bloodline."

Su Hao asked in confusion, "What are the shackles of the martial artist's bloodline?"

Wu Yuntian shook his head and said, "You'll understand later. Let's get back to the topic of obtaining energy from food."

"You know Fatty in the sentry post, right?"

"Yes, I do."

"Good. The food we eat, besides providing the amount for our normal activities, will also have a lot left over. The remaining part will eventually be converted into energy. There are two directions of conversion. One is the blood - qi I mentioned just now. This kind of energy is very active and can directly increase strength. The other is fat, which is stored, and then people will look fatter."

"However, the human body's default conversion direction is to store as fat because fat can be stored for a longer time. And the so - called blood - qi training method essentially intercepts the part of energy that would be converted into fat and makes it convert into blood - qi and store it in the body."

"Fatty is an example of failed conversion. That is to say, if you start learning martial arts too early and the conversion fails, you will..."

"Get fat!"

Su Hao's brows twitched again. There was such a risk. The thought of possibly becoming a chubby kid in the future made him a little scared.

At this time, Wu Yuntian took out a booklet from his arms and handed it to Su Hao, saying, "Go back and memorize this book first. After you've memorized it, I'll help you understand it."

Su Hao took it and saw - "The Nine - Palace Blood - Interception Manual."

"The name's not bad."