Besides, Dayu accepted Di Yao's edict in the court, succeeded his father's title of Earl Chong, and became the minister of water control in the imperial court, presiding over the major events of controlling the world's floods. Pen "Fun" Pavilion www.biquge.info

Just before ascending to the court this morning, Dayu was still a cloth commoner. But by the time he retired from the court, Dayu had become a count and a prince and a minister in the court. It's really "yesterday for Yamanolang, today for Tianzitang".

After the appointment ceremony of Di Yao, Dayu and his party of nine people retreated from the court. With the official lord, there was immediately the corresponding treatment, and the court allocated Dayu a four-horse chariot.

Dayu rode a four-horse-drawn car, the four members of the road will open the road in front, and the four members of the sky will be escorted in mid-air. After parading through the streets of the imperial capital, he returned to his residence. It's not a good time along the way.

The people of the imperial capital stood on both sides of the street, vying to see the new minister of water control. The crowd is surging, shoulder to shoulder. The people saw Dayu sitting in the car, with a lofty spirit, British capital, and solemn manners, all of them gave a thumbs up and secretly applauded: "What a young Dayu." ”

I also heard that Dayu still has the courage to call on ghosts and gods, and even the heavenly generals came to help Dayu, and listening to Dayu's dispatch was an eye-opener.

Dayu sat in the car, and was not fluttering because of the praise of the people. Knowing that there is a long way to go, I felt for the first time that the burden on my shoulders was heavy and the responsibility I was carrying was heavy. The heart is surging and the demeanor is solemn.

Dayu's car drove back to his residence, and as soon as he sat down, someone came to visit.

Dayu thought it was an official from the court who was visiting, and hurriedly stood up to greet him. Unexpectedly, it was a young boy of seven or eight years old.

After the boy entered the house, he first clasped his fists with both hands and saluted Dayu, and said in a childish voice: "Hello Brother Dayu." My name is Boyi and I am seven years old. He is the son of the judge Gao Tao (yao). ”

Dayu looked at Boyi. I saw Bo Yi's eyebrows and eyes, white face and red lips, full of vitality, showing a smart and beautiful atmosphere. It's like a fairy boy in a legend.

Bo Yi saw that Dayu was looking himself up and down, and hurriedly said: "I call you Brother Dayu, you won't be unhappy, right?"

Dayu loves Boyi very much, and said with a smile: "It's very good to call it like this, it's very kind." Boyi continued: "Brother Dayu, I want to go with you to control the water, can you take me there?"

Dayu was stunned when he heard this, and asked: "What? You want to go with me to control the water?—— I'm afraid you won't be able to! I think you're too young, and you still need someone else to take care of you." Let's wait a few more years and grow up a little more. ”

The four heavenly generals and the four mortal generals all laughed. Xuan Gong smiled and said, "Do you need to bring a nanny with you to treat the water?" and everyone laughed again.

Boyi said unconvinced: "I'm not young anymore, and I don't need a nanny for a long time." I've been studying for five years and practicing martial arts for four years. Besides, I can draw, and I won't be a burden to you. When controlling the water, I can be a staff officer and clerk for Brother Dayu. The places we have been to control the water, the mountains and rivers we have passed, and the strange things we have encountered, all of which are recorded, and then illustrated and compiled into a book for people all over the world to see. ”

Dayu thought in his heart: "This Boyi's temperament is very similar to when he was young, he was small and ambitious, not only had he read books, but also practiced martial arts, and he was very devoted to his temper." ”

Bo Yi saw that Dayu was silent, thinking that Dayu was not satisfied with himself, so he said eagerly: "Brother Dayu, don't look at my young age, but I don't read a lot of books, although my martial arts are not too high, but enough to protect yourself, if you don't believe it, just test me." ”

Dayu heard Boyi say this, and he was also interested. So he smiled and said, "Then I'll test the books you have read."

I say the last sentence, and you take the next sentence. Boyi said: "That's great, you can take the test." ”

Dayu said: "Chaos is beginning to open, and the universe is beginning to appear"

Bo Yi continued: "The Yellow Emperor painted the wilderness, and laid the mountains and rivers at the beginning. ”

Dayu said: "Dragon Master Fire Emperor, Bird Official Emperor"

Bo Yi replied: "The first rule of writing, is clothing"

Dayu said: "Chop (zhuo) wood for 耜 (shi), knead (rou) wood for 耒 (lei)"

Bo Yi continued: "刳 (ku) wood is the boat, and 剡 (yan) wood is the 楫." ”

Dayu said: "The law is like heaven and earth"

Bo Yi continued: "It's a big time to be flexible."

Dayu said: "Fang gathers by like"

Bo Yi continued: "Things are divided into groups"

Dayu said: "In the sky into an elephant"

Boyi continued: "Forming on the ground"

Dayu said: "The two of them are of the same heart, and their profits are golden"

Bo Yi continued: "The words of the same heart are as smelly as lan"

Dayu saw Boyi's answers, and couldn't help but be interested. Since I studied with Mr. Huaxiazi, I have never met such a chess opponent. couldn't hold back his interest for a while, so he said again: "Let's rhyme again, can you?"

Boyi said: "That's better. ”

Dayu said: "I said that the wind is high and the autumn moon is white"

Boyi right: "I am red to the rain and sunset"

Dayu said: "The red sun is near"

Bo Yi right: "Looking far away and white clouds are lonely"

Dayu said: "Lishui and gold are waiting to be metallurged"

Bo Yi said: "Kungang beautiful jade must always be cut"

Dayu said: "The cow girl is about two stars"

Bo Yi right: "Participate in business and fight the West and the East".

Dayu said: "Luo Jinxiu in my heart"

Bo Yi right: "Spit beads in the mouth"

Dayu said: "The three-foot sword on the waist of the strong man"

Bo Yi right: "Five cars of books in the man's abdomen"

Dayu said: "The sage follows the rules"

Bo Yi right: "The general swings the calibration rope"

Dayu said: "The bamboo shoots become bamboos because of the fall of the bamboo (tuo)"

Bo Yi right: "Fish is the beginning of the dragon"

Dayu said: "The emperor's title stone, the remains of the sea are Jingwei"

Bo Yi said: "The king of Shu is called the moon, and the soul of the cuckoo in the upper reaches of the branch"

Dayu said: "The Qinling Mountains are horizontal, and they are eight thousand miles away."

Bo Yi right: "Wushan rain wash, Saga twelve dangerous peaks"

Dayu said: "The vicissitudes of life are changeable"

Bo Yi right: "Heqing Haiyan, the rise of the trillion world"

Dayu said: "The turtle is out of Luo, and the Xihuang draws a hexagram because of the picture - this is an absolute, and no one has been able to match the sentence so far." Can you come up to you?"

What a Boyi, quick thinking. Seeing the scene, looking at Dayu in front of him, after a little thought, he came up with the following couplet: "Dragon and horse swim in the river, King Yu takes the law to make a clear chip."

Yes, Dayu stroked his palms and laughed, one was to laugh at himself and have an addiction to rhyme. The second is that I am happy that I have met a bosom friend, and the third is that I am proud to have discovered a young talent.

Boyi saw that Dayu was interested, so he struck while the iron was hot, and continued: "I'll practice my fists and kicks again to show Dayu's brother."

After that, he opened the frame in the middle of the house and practiced.

The four heavenly generals and the four mortal generals all gathered around to watch.

I saw Boyi flying up and down, spreading and moving. Sometimes it's agile and light, sometimes it's fierce. Looking at that posture, even three or five strong men are difficult to get close. With such a strong martial arts in the body, it is enough to defend oneself.

Dayu thought: "Don't look at it as a little child, his knowledge is no less than himself." Talents are rare, and the age is a little younger, but they are not too big. With such a person as an assistant, it will be much easier to work in the future. ”

So he clapped his head and said, "I'm going to decide on your staff officer and clerk." In addition, I will also give you a task, which is to record the mountains, rivers, resources and products, anecdotes and anecdotes that we have walked all the way to control the water, and write a "Classic of Mountains and Seas". ”

When Bo Yi heard that Dayu accepted him, he was so happy that he did a backflip. said: "Thank you Brother Dayu." ”

Dayu said: "Go back and pack your luggage now, and we will leave tomorrow to control the water." Boyi said: "I don't have to go back to pack my things, I have already brought my luggage." From now on, I will always follow Chongbo's left and right, waiting for Brother Dayu's orders. ”

Everyone liked Boyi very much, and pulled Boyi to say this and that, laughing and laughing.

At this time, someone came to visit again. This time it wasn't one person who came, but two people who came together. Both are around 10 years old.

After the two people entered the door, they saluted Dayu first. said together: "Hello Brother Dayu." ”

One of them said: "I am the son of Dasi Nong Houji, my name is Pythagorean, and I am eleven years old this year. ”

The other said, "I am the son of Da Situ Qi (xie), my name is Jiuzhang, and I am twelve years old. ”

Everyone looked towards the Pythagorean together, only to see the Pythagorean sword eyebrows, starry eyes, high nose beams, water chestnut mouth, and extroverted by nature.

Look at the nine chapters again: thin eyebrows, phoenix eyes, nose bridges, thin lips, introverted temperament, shrewd and calm.

Pythagorean said: "Brother Dayu, I heard my father say that Di Yao has issued an edict appointing you to succeed you to the title of Earl Chong, as the minister of water control, and preside over the management of the world's floods."

Jiuzhang and I each have a skill, and we have always been interested in the cause of water control, and the two of us will also go with you to control water and be your assistant. If you want to make a contribution to the country, please take us with you. ”

Dayu has a good impression of these two teenagers. Pythagorean replied, "My specialty is to do surveying, measuring the height of mountains and rivers, the straightness of rivers, the depth and stability of the water, and so on." He was going to be an assistant to the water officer. ”

Dayu asked, "Then how do you measure it?" Pythagorean said, "I have three tools." As he spoke, he took out three objects from his rucksack and took them in his hands.

Hold up one piece and say: "This is the rule" Hold up the other and say: "This is the rule" and hold up the third and say: "This is the standard".

Pythagorean held the three tools in his hand and continued: "Give me the length of the south wall and the length of the east wall of a house, so that I don't have to measure to know how long the southwest corner of the house is from the northeast corner." ”

Dayu said: "Then you can count our house." ”

Pythagorean took out the line of line, handed one end to Chapter Jiu, and asked Chapter Nine to help pull the rope.

They first measured the south wall from the southeast corner, and then measured it to the north, and then measured it from the southeast corner to the north, and found that the east wall was four zhang long. Pythagorean said: "Now I don't need to measure, I know that the length from the southwest corner to the northeast corner is five zhang, don't believe us to check it." ”

Bo Yi took the criterion, and measured it with Jiuzhang from the southwest corner to the northeast corner, and the result was indeed five zhang. Nothing more, nothing less.

Everyone couldn't help but open their mouths wide, and they all admired the measurement method of the Pythagorean.

Pythagorean said: "I named this proof the Pythagorean theorem. The hook is a right-angled side, the strand is another right-angled side, and the third hypotenuse is the chord. This is the theorem that hooks three strands and four, and strings must be five. ”

The Pythagorean put away the rules and yardsticks, and then said, "In addition to this, I have calculated that the pi of a circle is three and one seventh. I can also show you this: I use the line to form a closed circle, first measure the length of its diameter, compare this length, fold a bamboo strip, and then use this bamboo strip to measure the length of the yardstick that encloses this circle. As a result, the length of this line is exactly three times and one-seventh the length of the bamboo strips. ”

The Pythagorean will go on and on.

At this time, Jiuzhang couldn't help it. hurriedly said: "Brother Dayu, I also have a specialty." ”

Dayu asked, "What are your specialties?"

Jiuzhang blushed and said, "My specialty is arithmetic. I also invented an arithmetic tool. As he spoke, Jiuzhang took out a two-foot-long, one-foot-high wooden frame from his back, and twenty strings of round walnuts were inlaid in the wooden frame, and the walnuts were drilled in the middle, and they were put on with a bamboo stick, and each string was ten walnuts, and they could be moved up and down.

Chapter 9 says: "I named this instrument of arithmetic an abacus, with which you can not only count, but also calculate addition, subtraction, multiplication, and division. Now I'm going to show you how. Then ask Brother Dayu to name a number. ”

Dayu thought in his heart, if he wants to come out, it will be difficult for him to come out with a larger number. casually said: "Sixteen thousand eight hundred seventy-five".

At this time, he looked at the ninth chapter and counted it with his hand, and said: "Sixteen thousand eight hundred and seventy-five, a total of five digits, is ten thousand." As he spoke, he dialed one walnut on the fifth place on the right side of the abacus, six walnuts on the fourth place, eight walnuts on the third place, seven walnuts on the second string on the right, and five walnuts on the rightmost string.

Then, pointing to the one on the fifth place, he said, "This is ten thousand," pointing to the six on the fourth, saying, "This is six thousand," pointing to the eight walnuts on the third place, saying, "This is eight hundred," pointing to the seven walnuts on the second place, saying, "This is seventy," and pointing to the five walnuts on the right, "This is five." It was sixteen thousand eight hundred and seventy-five. ”

Dayu looked at it, and the nine chapters only gently flicked five abacus beads, and the abacus showed a large number of sixteen thousand eight hundred and seventy-five. Easy and intuitive at a glance. If we use the arithmetic method that is commonly used today, we must count 16,875 arithmetic chips one by one, and we have to count two hours.

Dayu said again: "What about adding another sixteen thousand three hundred and eighty-seventy-five?"

And he saw that in the ninth chapter he dialed another one in the fifth place, and in the fourth place another six, and in the third place eight in the third, and in the second place seven more up, and on the far right five walnuts, and then the ten walnuts on the far right were all dialed up, and in the ninth chapter they were all dialed down, and then one was added to the previous one, and it became thirty-three thousand seven hundred and fifty.

Everyone looked at the abacus of the nine chapters, it was so magical, and they applauded in unison.

Chapter Nine said: "This is nothing, I also calculated Chapter Nine Arithmetic." I can help Brother Dayu calculate the amount of money and grain, the number of labor, the amount of excavation of earth and stone, the number of days of construction, etc., to ensure that the calculation is fast and accurate. ”

Dayu was overjoyed and said: "Sure enough, it is a hero since ancient times, Pythagorean and Jiuzhang are outstanding young talents, I have stayed, and I will go with me tomorrow to treat the flood." ”

Square and Jiuzhang heard Dayu say that he would stay with him to control the water. Jumped for joy.

Dayu said as he put his hand into his arms and took out a measuring ruler. said: "I have here a measuring ruler given to me by the ancestor of Fuxi. Also given to the Pythagorean use. In the future, you will use this measuring ruler to add your rules, rules and yardsticks to measure the mountains and rivers in the land of China together, find out the best plan for water control that saves labor and time, and subdue the flood as soon as possible. Remember, the mantra for using this ruler is: 'Measure the sky, measure the sky, and the descendants of the dragon measure the rivers and mountains', have you remembered?"

Pythagorean solemnly took the measuring scale. replied: "Brother Dayu, don't worry, I remember everything you said."

The Pythagorean holds the measuring scale and can't put it down. Together with Jiu Zhang, he and Boyi spoke affectionately, chatting about the world and the world.