However, he didn't care about the money he lost. His thought was:
"If I don't use money to become stronger, then what's the point of having it? But I should be glad I learned Sealing Technique. I still have over 225,000 ryo."
As he began sparring with real weapons, he also started learning Rasengan.
The first and second stages had been learned a long time ago. He finally began learning the third stage.
The biggest problem with Rasengan training was that he couldn't let anyone see him practicing it.
For regular training, if someone interrupted him or discovered his training in the forest and saw through his disguise, he could make up some excuses, such as practicing after transformation, or saying that a Ninja must hide his arsenal and not display his skills unless absolutely necessary.
While these reasons might leave a bad impression, he wouldn't mind too much.
But for Rasengan, if he were discovered training it, that would be a huge problem.
His only available excuse now was that he could say:
"I figured it out myself after reading the Fourth Hokage's files."
However, this would portray him as an unparalleled genius, perhaps attracting the attention of Root Ninja and even Danzo Shimura himself! Not to mention they would monitor him more strictly.
So for Rasengan training, he decided to train secretly at home.
His senses were now keen enough to detect if anyone was watching him.
Therefore, if he felt someone was watching him, he would immediately abandon Rasengan training and instead demonstrate that he was training Wind Blast Technique.
To train Rasengan, he cleared his living room.
He only left a sofa in the living room, moved everything else into the bedroom, and began his training.
The compression and shaping part was quite difficult. He tried for several hours but without success. He sighed, thinking:
"I'll just follow Naruto's method first."
Then he created a Shadow Clone using twenty percent of his Chakra.
The Shadow Clone performed the compression and shaping of the Rasengan, and in this way, he learned the Rasengan within a few hours.
But he understood that relying on a Shadow Clone to create Rasengan was very inefficient, so he began training Rasengan without using any Shadow Clones.
It took him a month and a half to correctly master this Ninjutsu and be able to complete the creation of Rasengan!
In the remaining days, Feng Zheng wanted to use them to improve his Rasengan.
He wanted to reduce the time required to form it and increase the amount of Chakra that could be infused into it.
---
Now, only one week remained until the fourth-year final exam.
Genshu followed last year's procedure, asking students interested in taking the graduation exam to meet him after class. Feng Zheng thought:
"I guess it's time to officially become a Ninja. There's not much more I can learn at school. At best, I could learn another element or more Genjutsu. If I don't take the exam this year, the teachers and even Hiruzen might become suspicious. I certainly won't get much help from them in the future."
"If the disguise fails the exam, I don't believe my disguise performance can fool people with decades of experience. Anyway, I believe I am ready now, so I will take the exam well."
After class, Feng Zheng went to see Genshu and confirmed his intention to participate.
Genshu smiled and wished him good luck.
With only one week left until the final exam, Feng Zheng began to focus on the written exam syllabus. The syllabus for the written exam was quite surprising.
He recalled when Genshu started teaching this content at school.
He was teaching trigonometry. Feng Zheng's first thought when he saw this was:
"Trigonometry? For nine-year-olds? What's next? Differential and integral calculus?"
Although he was annoyed by this, he was very surprised when Hyuga Hana was able to solve these problems perfectly. He exclaimed in his heart:
"How can these nine-year-olds learn trigonometry so easily?"
He lamented that the children here were much smarter, then continued to study.
He also hoped to be fully prepared when performing missions. Instead of learning new Sealing Jutsu, he had his Shadow Clone focus on creating some important items for him.
He bought 2 Ninja pouches, 2 Ninja leg bags, and several metal wristbands. Then he had his Shadow Clone create Storage Sealing Jutsu on these items.
The Sealing Jutsu scroll in Library Section D provided some extended explanations of Storage Sealing Jutsu. It explained methods for increasing or decreasing the size of the storage space and manipulating its shape.
This was not very difficult, as it only involved increasing or decreasing the number of spatial symbols involved. So the Sealing Jutsu itself was still very basic.
However, this was very useful for Feng Zheng.
Inside the Ninja pouches, Feng Zheng drew 7 Storage Sealing Jutsu. For the Ninja leg bags, he was able to draw 4 Sealing Jutsu.
These had much smaller spaces compared to his Sealing Jutsu on scrolls, but considering their purpose was to increase the capacity of the pouches and leg bags, this was very convenient!
In the leg bags, 2 Sealing Jutsu could store 6 kunai each, and the other 2 Sealing Jutsu could store 24 Shuriken each.
Then, he created various triggers to refill the bags with weapons from the Storage Sealing Jutsu. This would greatly increase his weapon supply.
For the pouches, the Sealing Jutsu could store more things. But he hadn't decided how to fill them all yet.
He did have some ideas, such as first-aid kits, Ninja ropes, scrolls, Sealing Jutsu for storing elements, more weapons, Exploding Tags, soldier pills, ration bars, and so on.
For the wristbands, he made a small Sealing Jutsu on each wristband.
When he wore the wristbands, these Sealing Jutsu would be directly below his palms.
These Sealing Jutsu formed cubic storage Sealing Jutsu pieces of approximately 15 cm * 15 cm * 100 cm.
Both of these Sealing Jutsu were used to store swords. This way, he could draw his sword quickly at any time.
Besides this Sealing Jutsu, he also planned to draw three more Sealing Jutsu on each wristband.
On the back of the wristbands, Feng Zheng planned to buy two large and sturdy shields to store there.
If he was in a dangerous situation and couldn't protect himself with a rock shield, he could rely on these shields for cover.
However, since he wasn't sure about the size of the shields he wanted to buy, he didn't draw that Sealing Jutsu.
Besides these 2, he had originally planned to engrave two more storage Sealing Jutsu on the wristbands, but he hadn't thought of what to store yet, so he left it for later decision.
The day before the exam, Feng Zheng disguised himself and bought many weapons.
He bought 96 Shuriken and 24 kunai to fill the two leg bags.
He also purchased 12 Exploding Tags, attaching 6 of them to the kunai in each bag. The total cost was 65,000 ryo.
He haggled and eventually bought them for 55,000 ryo, making false promises of future purchases.