I studied abroad in modern times

Zheng Fa slowly walked to where Senior Sister Zhang was trapped.

When he walked three feet away, Senior Sister Zhang just opened her eyes.

The two of them didn't say a word, as if they were on a silent date.

Zheng Fa opened the "Topology" in his hand and continued where he talked yesterday.

Sometimes, Senior Sister Zhang would interrupt him and ask questions that he didn't understand.

Some questions were because her knowledge was incomplete and some things were difficult to understand. Zheng Fa answered them easily.

There are some things that Zheng Fa himself has not thought about clearly. At this time, Zheng Fa will be asked by her.

He frowned and began to think.

Senior Sister Zhang didn't rush him, she just looked at him quietly from the side with an inexplicable smile on her lips.

Sometimes Zheng Fa really couldn't answer her questions, and there was a little pride in her smile.

…

Both of them are monks, and their thinking speed has long exceeded that of ordinary people.

It took ten days to finish reading "Topology" - although it was just a scratch, at least Senior Sister Zhang now had a framework.

"Senior Sister Zhang, can this knowledge be helpful to you?"

Zheng Fa asked expectantly.

"Yes, I have."

"real?"

Zheng Fa said happily.

"Senior Sister Zhang, do you have some understanding?"

"That's not true."

"...Isn't that not helpful?" Zheng Fa couldn't help but feel a little puzzled.

"Because of this book, you come here every day at this time." Senior Sister Zhang pointed to the "Topology" in Zheng Fa's hand and said, "At this time every day, I feel much better."

"..."

Well, that helps.

But it wasn't the help Zheng Fa wanted.

Seeming to see his expression of disappointment, Senior Sister Zhang smiled and said: "The knowledge you taught me is profound and profound. I am only a beginner now, and I am still unable to combine it with the runes."

Zheng Fa slowly exhaled.

He was a little impatient.

If you could completely understand the runes once you learn "Topology", then Old Man Bai would have done it long ago.

Senior Sister Zhang has more accumulation in Talismans than Old Man Bai, but her accumulation in mathematics is much less.

It’s hard to say which of the two is higher or lower.

"Don't be disappointed, your knowledge is very promising. At least it has allowed me to find a way to re-examine the runes." Senior Sister Zhang comforted: "As I said, I still have nine hundred years, enough for me to understand."

Zheng Fa nodded.

That's a good thing to say.

…

Zheng Fa slowly walked into the Five Dragons Heavenly Palace, frowning slightly.

Passing "Topology" to Senior Sister Zhang was his last resort.

To be honest, it's a bit like treating a dead horse as a living horse.

But looking at it now, I can't say it's useless. I can only say that it may not be of much help to Senior Sister Zhang in a short period of time.

He believed that Senior Sister Zhang was gifted in mathematics and that nine hundred years would be enough for her to thoroughly understand this knowledge and even develop it.

but……

The birth of the Heavenly Monument always made him uneasy.

On the other hand, Senior Sister Zhang’s previous reminder made Zheng Fa feel a little vigilant:

If you don’t understand the yin and yang talismans, the foundation of the Yuan talisman will be lacking.

According to Senior Sister Zhang, even if she condenses Nascent Soul, she will still pay some price for this matter.

Therefore, Zheng Fa also had an urgent need to perfect the "Fudao Foundation Building Method" before building his own foundation.

This matter is very important to him and Senior Sister Zhang.

"Zheng Fa, come here for a moment."

As soon as he entered the Five Dragons Heavenly Palace, he heard Uncle Pang's voice ringing in his ears. Zheng Fa looked stunned and walked towards the main hall where Uncle Pang was.

"Did you go to see Master Zhang again today?" Master Pang asked as soon as he saw Zheng Fa.

"yes."

Uncle Pang looked at Zheng Fa with a hint of hesitation on his face.

"Uncle Pang?"

"Zheng Fa, please sit down first." Master Pang was silent for a while, with some admonishment in his tone: "Master Zhang is in this situation and is fine for a while. You should focus on yourself."

"Uncle Pang?"

"You and nephew Zhang don't have the name of Taoist couple now, but they are still better than Taoist couple." Uncle Pang suddenly said: "Although we monks say that wealthy couples are the most important thing, you have to understand that you are the most important thing."

"yes."

Zheng Fa didn't understand why Uncle Pang suddenly said this, but he still responded in a low voice.

"...the two most outstanding juniors of our Jiu Shan Sect, one is Senior Nephew Zhang, and the other is you." Uncle Pang seemed to see his incomprehension and said directly: "Now that something has happened to Senior Nephew Zhang, I don't want you to do it again. be affected."

Zheng Fa was stunned.

These words... are suspected of abandoning Senior Sister Zhang.

"Of course I will save Master Zhang's nephew," Master Pang said softly, "But if it affects your path, I won't agree."

"..."

Zheng Fa didn't know what to say.

"Do you know who were the most famous Taoist couples of our Jiu Shan Sect in the previous generation?"

"I don't know."

"Your Uncle Huang and her husband."

"husband?"

Zheng Fa couldn't help but be stunned. Uncle Huang is now sitting on the seventh peak of the Nine Mountains. He almost never goes down the mountain and has never heard of having a husband.

"Her husband is, I think, the most genius true successor of the previous generation of the Jiushan Sect." Uncle Pang sighed: "He is also my best friend."

"Your Uncle Huang's temper was ten times hotter than that of Uncle Zhang, and he acted impulsively. Then he encountered an accident. As her husband, of course my friend would sacrifice his life to save others."

"..."

"Of course you guessed it later, your Master Huang was rescued and he died." Zheng Fa suddenly saw some anger on Master Pang's face: "If not for this, I, the Nine Mountains Sect, would probably be able to transform into multiple gods!"

Only then did Zheng Fa understand why Uncle Pang had a pretty good attitude toward Senior Sister Zhang, but he always addressed Uncle Huang by her surname Huang.

"Later, the man surnamed Huang came back and said he wanted to take revenge. He made some sort of xuanguanjian..." Uncle Pang sighed softly: "Now, Master Zhang is trapped in that xuanguanjian again. Is that a xuanguanjian? Is it a lesson learned from the past... …”

"What's more, you haven't established a foundation yet, so how can you help nephew Zhang?"

Zheng Fa knew in his heart that Uncle Pang's persuasion was not unreasonable.

In fact, everything he can do has been done.

The rest can only be relied on by Senior Sister Zhang herself.

…

In Zheng Fa's house, he was immersed in cultivation.

Although he was giving lectures to Senior Sister Zhang every day, he did not delay his own cultivation.

On the contrary, he is even more diligent than before.

Senior Sister Zhang's Xuan Guan Jian can only be broken from the inside now, but that is because it is in the thunder pool. If the thunder pool changes, the Nascent Souls of the Great Freedom Demon Sect can take action——

At that time, there will definitely be a battle between the Jiu Shan Sect and the Great Freedom Demon Sect.

His current cultivation level is not enough.

The night was getting dark, and a vortex of spiritual energy suddenly appeared in the room where Zheng Fa was.

This whirlpool of spiritual energy was larger than before, and even affected many disciples who were practicing in the Five Dragons Heavenly Palace.

Uncle Pang and several of his disciples in the main hall all felt it.

They all looked in the direction of Zheng Fa's room.

"That's Junior Brother Zheng?" A disciple whispered in surprise: "Has he reached the stage of advanced qi training? How long has it been?"

Another older disciple on the side was also surprised: "I have never seen anyone like Junior Brother Zheng, who gets faster and faster with practice... His talent is really amazing."

"The talent is amazing..." Uncle Pang's eyes were a little distant, as if he was thinking of someone: "Only in this way, it looks more like him."

"Master?"

…

"Have you completed your advanced qi training?" When she came to Senior Sister Zhang, she could see Zheng Fa's state at a glance, and her eyes were a little happy: "This speed is half a month faster than me."

Zheng Fa shook his head.

If we include modern time, Senior Sister Zhang is still faster.

"You must think carefully about foundation building." Senior Sister Zhang warned again: "If you feel that the "Fun Dao Foundation Building Method" is not perfect, you can buy a Huayuan Pill to remove the Rune Dao Foundation in your body. Although your cultivation level will be lowered a bit, the spiritual power in your body is enough - it will be quick if you follow the orthodox path of foundation building."

It was obvious that Senior Sister Zhang had thought about it for him.

According to Senior Sister Zhang, this Talisman Dao Foundation Building Method is a cultivation accelerator and should be thrown away after use.

Zheng Fa nodded slightly, this was a solution.

Although "Topology" has been taught to Senior Sister Zhang, Zheng Fa has gained nothing from coming to see Senior Sister Zhang. On the contrary, Senior Sister Zhang can give him a lot of inspiration in both Talisman and Mathematics.

"I have been thinking carefully these past two days, and I just feel that the knowledge you taught me is really very rigorous. It is derived from a few so-called axioms. Except for a few axioms that cannot be proved, the rest of the theories are actually there. Where to come.”

Zheng Fa also agreed upon hearing this. This is also a characteristic of modern mathematics.

"This idea actually comes from a great sage. He was the first person to put forward several axioms."

Zheng Fa began to tell his senior sister the five axioms in the Elements of Euclidean geometry, and how doubts about the axiom of parallel lines eventually led to the creation of non-Euclidean geometry.

"Can justice be doubted?" Senior Sister Zhang's eyes flashed with admiration: "This is really some great wisdom."

"Of course you have to doubt, and even doubt is the biggest reason why this knowledge can progress." Zheng Fa said with his own little understanding of science: "Doubt..."

He paused.

Suspect……

He had always accepted Senior Sister Zhang's point of view without any doubt: what was condensed in the Yuanfu Daoji was the Rune Diagram.

Is this the parallel line axiom that can be doubted?

In the Talisman Tao Foundation Building Method, the Yin and Yang Talisman diagrams will create each other.

But in the void of the Xuanwei Realm, those runes did not show this property.

This is almost equivalent to the experimental results not being consistent with the theory.

So are these two talismans really the same?

"Not a talisman? But what we condensed is a talisman."

"Yes, but if we put aside this premise and look at it." Zheng Fa's eyes sparkled with excitement: "What can we deduce from the premise that yin and yang coexist because of mirror images?"

Senior Sister Zhang frowned, still not sure why.

"Only the five-element sub-talisman can satisfy the properties of a mirror image." Zheng Fa said loudly: "Although the other two sub-talismans affect the properties of the rune diagram, they have nothing to do with the essence of the rune diagram!"

Senior Sister Zhang's eyes lit up.

She understood what Zheng Fa meant.

"You mean, the Five Elements Talisman is the essence of the spiritual talisman?"

"No, what I mean is that the five elements are the inherent properties of spiritual energy." Zheng Fa expressed his conjecture: "When we practice, no matter what cultivation method we use, we will ultimately absorb spiritual energy - and there is a difference between spiritual energy and spiritual talismans. ”

"Reiki also has five elements, but it doesn't have those two types of sub-talents!"

"The Dao foundation condensed in our bodies may be more aura than spiritual talisman!"

"See through the false, discard the false and retain the true, and then you can achieve the great truth..." After a long silence, Senior Sister Zhang sighed: "You did it today."