Since traveling to the Naruto World, Chao Yanqian has made many assumptions about the mystery of Chakra. During the years when he was in the Ninja Academy, he constantly verified his assumptions through practice.
Judging from the original work, Chakra can be used not only for the Five Elements Ninjutsu but also for sealing techniques and various forbidden techniques.
S-rank ninjutsu, like [Reanimation Jutsu] and [Flying Thunder God Technique], have clearly surpassed the concept of ordinary ninjutsu and have nearly touched the realm of 'God.'
If Chakra is truly a special kind of energy produced by the combination of human spiritual and physical energy, as stated in the textbook, then it seems unreasonable that Chakra can be used for this level of ninjutsu.
That's why Chao Yanqian even believes Uchiha Madara's statement that the God Tree is the root of all Chakra, and that the Chakras of all ninjas in the world originated from the God Tree.
It wasn't until Otsutsuki Kaguya stole the fruit of the God Tree that Chakra began to appear in humans.
To put it simply, Chakra was originally not part of humans, but after the God Tree disappeared, Chakra became hidden within both the human body and the natural world. Ninjas can extract the Chakra hidden within their bodies using certain special methods.
But this theory seems somewhat untenable. Although Chao Yanqian has read the original work, he hasn't studied it in depth. However, now that he has personally traveled to the world of Naruto, Chao Yanqian is determined to thoroughly study the nature of Chakra.
Although these are just speculations from Qian Ren, they cannot be easily explained to Uenome. After all, Chao Yanqian is just an eight-year-old kid now. Knowledge beyond his peers can be interpreted as a gap between genius and ordinary people, but if he knows too much about the mysteries of the Ninja world, he might be caught and dissected for research.
He shook his head and slowly said to Lost Thousands, "I don't understand much, that's just what I learned at the ninja academy. But when I use Chakra, I always feel like it also exists in nature. It's a faint feeling, but I can't explain it exactly."
"Chakra in nature?" Ueno furrowed his brow slightly, finding it hard to understand.
"How is that possible!?" Hoshinohara exclaimed. "Isn't Chakra a combination of mental energy and physical energy? How can Chakra exist in nature? Thousands, can you really feel it?"
Feel a fart!
The reason Asa Tsunami said that was to test Uenome and relay his thoughts to the ears of the Third Hokage.
Chao Yanqian wasn't sure when Jiraiya started studying Sage Mode, but since Jiraiya signed a summoning contract with the Toads of Mount Myoboku, maybe he knew something about Sage Mode.
As long as Jiraiya or Orochimaru hears about this and shows interest in Sage Mode, they might come to see Chao Yanqian.
"I can't say for sure, it's just a feeling," Chao Yanqian said with a light smile. "Forget it, let's not dwell on it. Ueno-sensei, let's start our class today!"
"That's good!" Ueno nodded with a serious face. "Chakra is an important energy source for ninjutsu, so precise control of Chakra is essential for ninjas. If you perform a ninjutsu and it costs 30% of your Chakra, but if it's not well-controlled, 40% of your Chakra will be consumed or even more. Learning how to precisely control Chakra is a compulsory course for ninjas."
"How do I control Chakra?" Hoshinohara asked curiously.
Uenome said, "Previously, you didn't have enough Chakra for this type of training, but after the last mission, I think you're ready. Today's mission is tree climbing!"
Tree climbing, of course!
When Chao Yanqian first learned to extract Chakra, he wanted to use this method to train Chakra control, but back then, he had too little Chakra to support his body, so he gave up.
Later, however, Chao Yanqian found that he had very strong control over his Chakra, so he skipped the tree climbing exercise.
"Tree climbing?" Hoshinohara complained upon hearing this. "Is that even a form of training?"
"It's not just ordinary tree climbing, but…" Uenome had already climbed onto a large tree using only his feet, standing atop it and looking down at them. "You attach Chakra to the soles of your feet to create suction, allowing you to climb the tree using just your feet. This method helps you precisely control your Chakra. You two give it a try!"
Chao Yanqian watched Uenome demonstrate tree climbing and began concentrating his Chakra on the soles of his feet to form suction.
It was a bit challenging at first, but with a little practice, Chao Yanqian mastered the technique.
It wasn't just about applying the right amount of Chakra to make the soles of his feet stick to the trunk—the key was maintaining a steady output of Chakra. If too little Chakra was used, one would fall from the tree. If too much Chakra was applied, footprints would appear on the tree.
"Damn! No way!" After falling down several times, Hoshinohara looked at Chao Yanqian, who was hanging upside down from the tree, his mouth wide open in disbelief at what he was witnessing.
"Ohara! It looks like you've been overtaken by the younger generation!" Uenome teased, stirring up competition between Hoshinohara and Chao Yanqian.
"Damn it!" Hoshinohara gritted his teeth and ran up the tree again, but after only a few steps, he fell with a 'thud.'
Chao Yanqian asked curiously, "Hara, haven't you studied medical ninjutsu? Precise Chakra control is required for medical ninjutsu, so…"
Before Chao Yanqian could finish, Uenome cut in, "If he had such strong control of Chakra, his mother would have taken him to become a medical ninja already. Instead, he's risking his life on missions with me."
"Oh, that explains it," Chao Yanqian said to himself.
"Alright, Hara, I'm going to take Qianren to the next training. You've got to work hard on your own, no slacking!" Uenome waved at Hoshinohara before leaving with Chao Yanqian.
"Damn it, you two just wait!" Hoshinohara yelled angrily, watching the two walk away.
Uenome led Chao Yanqian to a small river and said casually, "You adapted to the tree climbing exercise so quickly. I doubt you'll have trouble with water-walking."
As he finished his sentence, Uenome stepped onto the water's surface, demonstrating for Chao Yanqian.
"This training involves gathering Chakra on the soles of your feet to form repulsion, keeping you from sinking into the water. However, the difficulty lies in adjusting your Chakra continuously in response to the water's movements. Although this practice is similar to tree climbing, it's several times more difficult." Chao Yanqian analyzed.
"Very keen insight. Tree climbing trains the maintenance of Chakra, while water-walking trains the adjustments. Go ahead and give it a try!" Uenome instructed.
"Got it!" Chao Yanqian responded.