The lamp burned until the next day, when the rooster crowed.

Later, it had been a long time since my grandfather told me about it, but he still couldn't help but be overjoyed, dancing like a child who had just entered school, as if a new world suddenly unfolded in front of his eyes, which surprised him and made his head a little hot and uncontrollable. I was puzzled and intrigued to ask, "What is it on those toilet papers that deserves your pleasure?" ”

Grandpa talked about other things: "Your grandfather is really a clever person!" I knew that he was so powerful, and I would have learned magic from him very carefully. He actually knew about the female pervert before he died. ”

I was surprised, "What? Did Daddy know when he was still around? ”

Grandpa may have been too happy to hear my question, but said to himself, "Father is really hidden!" If you don't walk in, you don't know how big he is, and if you really go in, you will get lost. ”

In fact, my grandfather gave me the same feeling as my grandfather felt to my grandfather. At first glance, my grandfather looked like a complete old farmer, but he slowly showed me all kinds of amazing abilities. I thought that I could surpass my grandfather by getting a copy of "Hundred Techniques", but now it seems really unrealistic. Maybe my grandfather was also disdainful when he saw his grandfather, and he didn't care to learn magic from his grandfather at all. So many years after my grandfather's death, I stumbled upon my father's manuscript, and my grandfather was surprised by how powerful my grandfather was.

My grandfather suddenly asked me: "There was a celebrity in the Wei and Jin dynasties, named Ruan Ji, do you know?" ”

I said yes. High school Chinese textbooks often mention this bohemian historical celebrity.

He said: "Ruan Ji was a big celebrity at that time, in addition to drinking and writing poetry, he also liked to whistle, and his voice could travel a mile or two. One day, there came a monk named Sun Deng in Sumen Mountain. Ruan Ji went to see him. ”

Sun Deng was also a famous man at that time, he didn't marry a wife, he didn't live in a house with a blue tile mud wall, he lived in a hole dug by himself all year round, his hair was scattered in winter, and he made grass for clothes in summer, especially like to read "Zhou Yi", and he carried a one-stringed piano with him, and he could play a good tune. Oddly enough, he never gets angry. ”

Ruan Ji climbed up the mountain sweating profusely, and saw Sun Zhenren sitting on the mountain rock with his knees crossed; As soon as the two of them met, they sat with their legs outstretched. Ruan Ji talked about the past and the present, and talked about the mystical and nihilistic propositions of the Yellow Emperor and Shennong eras, and then studied the profound virtues of the Xia, Shang, and Zhou dynasties, and asked Sun Deng about these. As for Sun Deng, he tilted his head and did not answer. Ruan Ji also talked about the Confucian doctrine of morality and Taoism, and the Taoist method of concentrating and guiding qi to see his reaction, but Sun Zhenren still looked expressionless and noncommittal, which made Ruan Ji quite depressed, so he whistled at him mischievously. ”

After a long while, Sun Zhencai said lightly: Yes, you can blow it again.

"Ruan Ji blew it again."

"Ruan Ji knew that he had met a master, so he fell silent."

"It was getting late, Ruan Ji got up to say goodbye, just walked halfway up the mountain, suddenly heard the sound of all the voices on the top of the mountain, as if a band was performing, Ruan Ji looked back in surprise, only to see Sun Deng waving to him, whistle came from him, whistle like a waterfall."

After Grandpa finished speaking, he was immersed in his own story and looked intoxicated.

"What is powerful, this is called powerful." Grandpa excitedly gushed to me, "The composition of Fang Shi is very complex, there are both knowledgeable intellectuals and charlatans who do not know how to learn. There were not only scholars engaged in the research of traditional science and technology, but also ordinary farmers and merchants, as well as politicians who entered and left the court, and most of them were hermits and Taoists. Some of them are no less than the three princes and nine kings, and they are regarded as guests by the emperor. Some are similar to beggars, and are ranked in the lower ninth class by the common people. Your father's father did not allow him to follow his official career, so he did not have the life of the three princes and nine kings; Since Zu Yin is still good, it is impossible for him to become a beggar. From beginning to end, I thought he was just an arithmetic bookkeeper who only played magic out of boredom. ”

I've heard my mom say that my dad can put an abacus on top of his head and play with it.

"Isn't he playing?" In my mother's account, in my memory, my father and grandfather used the magic they knew to help their relatives and neighbors within their capabilities, and they never deliberately studied it, nor did they have greater ambitions.

Grandpa said: "Your grandfather is like Sun Zhenren, looking at things that are just for fun before they are revealed to others, I don't know how many mountains and rivers are in my stomach." ”

"Then where did you learn about these landscapes of your grandfather?" I asked.

"From the toilet paper." Grandpa was still overjoyed. Surprise flowed across his ravine's face.

"Toilet paper?"

"That's actually your grandfather's manuscript."

"Daddy's manuscript? Is toilet paper a grandfather's manuscript? What do you remember? At this time, it was actually superfluous to ask grandpa like this, and without even thinking about it, I knew that what must be written on it must be a magic or something, similar to "Hundred Techniques Exorcism", but I still couldn't help blurting it out.

Grandpa told me about the notes on the toilet paper.

So it was. When Grandpa first came into contact with Fangshu, it was indeed due to boredom and curiosity, and he only learned some arithmetic techniques at first. If my grandfather had only used his fingers to calculate, there would be no manuscript now. When my father was using the abacus to calculate the entry and exit of rice at home, he accidentally made a clever move: Can the algorithm be used in the abacus? If you only use your fingers to calculate, you can only calculate the things in a short period of time in front of you, and if you use the abacus on the abacus, the time range that can be calculated is very large.

So, after dinner, my father tried to use the abacus that was plucked to shine instead of pinching with his fingers. With this calculation, the time range that can be calculated suddenly increased by many times, many times. This effect was not expected in advance. Daddy was surprised and scared, surprised that he stumbled upon such a secret, and scared that the more he knew, the more he worried, and these foretold things were uncomfortable in his heart, but he lost his life when he said it.

Daddy's fingers hung over the abacus, and he didn't dare to put it down for a long time. He was bewildered by his shocking discovery, and he was at a loss. A vast new world unfolded under his hands......

...