Yang Kang had fantasized about the scene when he met Huang Rong countless times. Huang Rong was his imaginary lifelong enemy. He had made various plans for this imaginary enemy in order to nip the danger in the bud.

This kind of planning was often carried out in the first year or two after he time traveled. At that time, he was a baby and only had to eat and sleep. If he didn't think about it, he really didn't know how to pass the long boring time.

It can be said that he spent his infant years in this world relying on fantasy about Huang Rong.

Various versions of Huang Rong had appeared in his mind, so the little girl in front of him had died countless times in his imagination, and in all kinds of strange ways. Now he finally saw her alive, Yang Kang said

I feel very fresh.

Just like a magical girl from the two-dimensional world suddenly appeared in the real world, this feeling made him feel dazed for a moment, especially the little girl's urging just now, which seemed like a scene in elementary school when he was helping his deskmate to do homework.

"Why are you in a daze? Come and help." The little girl said dissatisfied.

Yang Kang walked into the pavilion and looked at the papers on the stone table. There were arithmetic problems on them. The little girl was holding a few bamboo sticks in her hands and looking like she was thinking seriously.

He knew that those bamboo sticks were called abacus, which was an ancient counting tool. It was divided into vertical and horizontal formats and could be used for decimal calculations. However, abacus had already become popular in this era, and merchants all used abacus in their accounting offices.

It is very convenient to calculate.

This kind of counting chips is only used by Taoist priests and some people who specialize in arithmetic. Taoist priests use counting chips for divination, while those mathematical experts who study arithmetic prefer this ancient counting method.

Yang Kang suddenly thought that he and Huang Yaoshi had something in common. Huang Yaoshi was not only excellent in martial arts, but also quite proficient in strange arts. As a graduate of a third-rate university, he at least had certain advantages in geometry and calculus.

Forget about this modern Western thing, but pi can continue to be derived.

Due to the complexity and limitations of ancient Chinese mathematical algorithms, Zu Chongzhi only calculated pi to six decimal places, which was already a remarkable achievement. However, Yang Kang could derive it further, just by using a completely new algorithm.

Maybe I can create a new era of mathematics.

Yang Kang finally found some sense of superiority as a time traveler, but he will consider this later. He currently has to help Huang Rong with her homework. Huang Rong faced several sets of four arithmetic operations, which was indeed a bit difficult for a four or five-year-old girl.

It’s difficult. Children of this age will still be in the kindergarten class in future generations.

It is not difficult for him to calculate the result, but it is very difficult to use a calculation chip to calculate. He does not know how to use it at all. He is the young prince of the Kingdom of Jin, not an accountant.

The concept of calculation was told to him by Yelu Chucai, with the purpose of increasing his knowledge. In this era where scholars are valued over craftsmen and literature is valued over industry, scientific workers and craftsmen are at the same level, even people like Zu Chongzhi and Shen Kuo

In ancient times, great scientists could only serve as small officials.

"How is it? Can you count?" The little girl handed him the bamboo stick in her hand and asked with a hint of arrogance.

Yang Kang didn't dare to take over the arithmetic chips for fear of revealing his secrets. There were rules for how to place the arithmetic chips and how to perform calculations. They couldn't be fooled casually.

He silently calculated the multiplication table in his mind, and then reported the answer directly. The little girl looked at him with suspicion. She didn't believe that someone could calculate these questions so quickly, so she started to check.

As the results came out, the little girl opened her mouth in surprise with a look of disbelief, but she suddenly became happy.

"I'll leave these questions to you from now on. Don't tell my father." The little girl said quietly while quickly writing down the answers on the paper.

"Where is your father?" Yang Kang asked.

The ugly daughter-in-law always has to meet her parents-in-law, and she has to face Yaoshi Huang on Peach Blossom Island. This is a hurdle that he cannot overcome.

What's more, Huang Yaoshi left him here with peace of mind. I'm afraid he already knew his identity. Qu Lingfeng's coffin was placed together with a tombstone. The handwriting engraved on the tombstone clearly showed the relationship between Yang Kang and Qu Lingfeng.

Relationship.

"I'm sorting out the things you brought in the back," the little girl said casually.

Yang Kang brought two things, one was Qu Lingfeng's body, and the other was the treasure that Qu Lingfeng had stolen from the palace. The next moment, he had a bad premonition. Those calligraphy and paintings...

"Don't you know that you need to use painting tubes to store these calligraphy and paintings?" Huang Yaoshi saw Yang Kang coming and reprimanded him bitterly, "These authentic works of famous artists have been ruined like this, and every one of them is a unique copy."

That's right, Huang Yaoshi was sorting out the calligraphy and painting. He put the water-soaked calligraphy and painting on the stone slab. He was heartbroken every time he looked at each one, and he was even more angry when he saw Yang Kang.

These calligraphy and paintings were originally packed in an iron box by Qu Lingfeng. Qu Lingfeng would sometimes take them out to appreciate them. Since they were not afraid of wind and sun in the secret room, they did not put them in bamboo tubes. Yang Kang moved the iron box away directly.

I didn't even pay attention to the preservation state of the items inside.

He did not expect to encounter strong winds and waves at sea, and the rainwater soaked into the iron box and wetted the calligraphy and painting. Although it still looked intact, this was an unforgivable sin for Huang Yaoshi, who pursued perfection.

details make a difference.

Yang Kang deeply realized this. Nothing he could do at this time would help, let alone defend himself. He could only bow his head and admit his mistake.

"My grandson knows I was wrong." Yang Kang knelt on the ground and said sincerely.

"Are you Lingfeng's child?" Upon hearing this, Huang Yaoshi looked away from the calligraphy and painting and glanced at Yang Kang.

"Yes." Yang Kang admitted.

"Tell me how Lingfeng died." Huang Yaoshi said coldly.

Looking at Huang Yaoshi's attitude, Yang Kang knew that the long-prepared drama of suffering could not be staged. Huang Yaoshi was an aloof person. This character deeply affected his disciples, whether it was Mei Chaofeng or Qu Lingfeng.

They all have this stigma, that is, they don't take anyone else seriously except Huang Yaoshi.

If Yang Kang wants to be recognized, he must bring out the arrogance of Peach Blossom Island, not shed tears, not give in, and persevere to the end.

He began to narrate the story about Qu Lingfeng in a calm tone. Those details were all in his mind. He had reviewed it many times when he was in the tavern. Now, the suppressed tone of the observer made it even more true.

After listening, Huang Yaoshi closed his eyes, and everything Yang Kang said flashed through his mind. He suddenly felt that it was all too real, and the truth was a little false, as if it was deliberately arranged.

, every detail is so precise.

Is he really Lingfeng's child? Why did this child with Quanzhen martial arts come to Peach Blossom Island? Is it because of the lunatic in the back mountain?

"I understand." Huang Yaoshi opened his eyes, a glimmer of light flashed in his eyes, "Since Lingfeng's last wish is to stay on Peach Blossom Island, you will bury him here and give you seven days to mourn. After seven days, you can
Chapter completed!