Chapter 87

Su Junyu then taught Wang Qi two more calculation methods, known in the神州 as the "Baize Expansion" and the "Liyeh Expansion."

Looking at the equations Su Junyu had written down, Wang Qi felt a moment of nostalgia. These were precisely the Laplace expansion and Fourier expansion he was familiar with from his previous life, both methods for simplifying complex problems.

Am I one of those people who won’t forget how to solve problems even after death?

Wang Qi mocked himself in his heart.

After teaching the Baize and Liyeh expansions, Su Junyu handed Wang Qi a piece of Heavenly Wood Core and returned the intrinsic transformation formula of the mixed red copper spirit energy he had calculated earlier, asking him to simplify the formula for the mixed red copper and then derive the intrinsic transformation formula for the Heavenly Wood Core.

During this time, Su Junyu particularly emphasized that the Liyeh expansion was the most important, and would be very useful in the future when calculating the intrinsic formulas of spirit energy.

The Liyeh expansion, which Wang Qi was familiar with as the Fourier series expansion, is used to simplify periodic functions. Any cultivation method requires the circulation of the heavens or regulated breathing, and the spirit energy cultivated will inevitably have periodicity. Being familiar with the Liyeh expansion allows one to quickly grasp the subtleties of an opponent's cultivation method during a battle, thus controlling the rhythm of the fight.

It didn't take long for Wang Qi to hand the two formulas back to Su Junyu.

Su Junyu glanced at them, his face full of surprise: "I say, have you studied this before?"

Wang Qi shook his head in denial. The surprise in Su Junyu's eyes grew even more. He praised, "You are indeed one of the most talented people I have ever seen."

Wang Qi was about to humbly respond with a proud expression, but Su Junyu sighed again: "What a pity, you are entering the sect this year."

Wang Qi's mouth twisted, and he suddenly didn't want to talk to Su Junyu anymore.

"If it were in previous years, I might have happily said, 'We have another genius in the Myriad Methods Gate,' and then we would have enjoyed ourselves together in the Myriad Methods Gate." Su Junyu continued, "Unfortunately, you are proud and ambitious, and will only accept a true disciple position. The Ethereal Palace... once you become a true disciple, you will inevitably face that terrifying monster! Thinking about your future, it’s truly bleak."

"That monster," the current chief true disciple of the Ethereal Palace, is the most outstanding cultivator of this generation. Wang Qi had heard so much about this person that his ears were about to grow calluses.

Wang Qi seriously told Su Junyu, "This is my path, my joy, and it cannot be changed."

Su Junyu didn’t expect to persuade Wang Qi. At this moment, Mao Zimiao, holding her exercise book, walked up to Su Junyu, her eyes brimming with tears: "So difficult..."

Su Junyu thought for a moment, didn't look at Mao Zimiao's exercise book, but directly handed it to Wang Qi: "It's up to you."

"Ah?" Wang Qi asked in confusion: "Why me?"

Su Junyu answered solemnly: "The process of guiding others is also a way for you to solidify your foundation. Don’t refuse."

After saying that, he reached out and retracted the crystal lamp from mid-air, saying: "That's it for today. If you have any questions, come ask me tomorrow."

Mao Zimiao politely said goodbye: "Goodbye, Senior Su."

Su Junyu waved his hand without turning his head: "I can only help you this much."

This sentence had completely different meanings to the two of them.

Wang Qi huffed in dissatisfaction: "You just want to be lazy, right? Tsk, if you promised to guide, you should follow through!"

Mao Zimiao's cheeks turned red, and her ears twitched. During the trial, Wang Qi had saved her life, which greatly increased her affection for him. The accidental "electric shock-like feeling" and Wang Qi's embrace to satisfy his own whims had stirred something in the half-demon girl's heart.

But Wang Qi didn't think much before acting; he did whatever he found interesting, so he was completely unaware of his actions and certainly didn't know what Mao Zimiao was thinking.

Mao Zimiao's feelings, therefore, became a one-sided infatuation. When Su Junyu pointed out her feelings and left that sentence, she couldn’t help but hear the underlying meaning.

Wang Qi raised his left index finger, which emitted a golden light, and began to flip through Mao Zimiao's exercise book. After a while, he shook his head: "Aren't all of these wrong?"

Mao Zimiao pouted: "Wang Qi, you're bullying me. Not everyone is like you."

Wang Qi said: "So, why don't you just focus on studying the Way of Life? The limitations of your half-demon body mean your calculation ability won't match that of humans until you reach the Foundation Establishment stage, right?"

Mao Zimiao flicked her tail and ignored Wang Qi.

"Alright, alright, do you want me to explain it to you now or find time tomorrow?"

Mao Zimiao thought for a moment and said: "Now!"

As his cultivation improved, Wang Qi needed less sleep. Mao Zimiao, with her cat demon blood, had as much energy at night as during the day. Wang Qi thought he still had plenty of time to explain the problems to Mao Zimiao.

Wang Qi then thought about another question: "Where should we go?"

Mao Zimiao originally wanted to suggest her room. But it was already late, and if she led Wang Qi into her room, rumors would likely spread throughout the immortal academy the next day. For the same reason, Wang Qi's room was also not a good option.

Wang Qi suddenly said: "Right, I know a good place!"

"Meow?"

"I'll take you there."

After saying that, Wang Qi took a step forward, and Mao Zimiao had no choice but to follow.

It was a new moon that day, and the moon was completely covered by shadows. Without the influence of moonlight, the stars in the sky shone brilliantly.

Mao Zimiao suddenly said: "It's almost July, meow."

Wang Qi nodded: "Yes, it's July."

Although the climate in Xinyue Immortal City was regulated by the Flowing Cloud Sect, the air still had a hint of summer heat. Wang Qi was only wearing a single layer, and Mao Zimiao had changed into summer clothes, with her forearms exposed and her tail swaying behind her.

"Wang Qi, by this time next year, we should be in our respective sects, right?"

"Assuming we pass the exams."

The two chatted casually as they walked. Mao Zimiao suddenly felt a bit happy. The night hid the changes in her face, and Wang Qi didn't notice anything unusual.

They walked all the way to the lecture hall of the immortal academy. Wang Qi used his technique to jump onto the roof of the lecture hall and then called out to Mao Zimiao: "Zimiao, come up."

"Meow?" Mao Zimiao asked in surprise: "Is the 'good place' the roof of the lecture hall? Why?"

Wang Qi smiled and gave a thumbs up: "This is called sentiment!"

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