The strong desire for knowledge and curiosity tortured Liu Duan all night without sleeping well. When the first rays of sunlight came in through the window, Liu Duan got up from the bed. With this kind of furniture with four legs, Liu Duan slept very comfortably. When you go back to the palace, you must be a master and make one for your mother, and it is really uncomfortable to sleep on such a low couch.

Under the guidance of Wei Qing, Liu Duan folded the quilt by himself for the first time in his life. Although the fold was crooked, his heart was still full of pride, and he didn't see Liu Shengxia's kid almost fold himself into the quilt.

As soon as the four small copper basins slipped away, the Yulin guards called the well water to fill the copper basins one by one. A few little fellows picked up their toothsticks, wiped them with fine salt, and poked them in their mouths. I wiped the soap in my hand and washed it on my face, which was smooth and greasy, and it was very comfortable. Liu Duan liked the smell almost immediately, but Liu Sheng was now squeaking because he accidentally wiped the soaphorn into his eyes.

The Yun family's Hou Mansion is not big, and the four children are not so much running as walking. The smell of evaporating dew in the fields was very fresh, and the blue-headed dragonflies kept flying overhead. The farmer who went to work drove the oxen, and the shepherd boys who herded the sheep herd. Walking along the bluestone road to the outside of Zhuangzi, several elderly women waited for the crowd to leave, and swept the road with brooms.

Steamed buns filled with leeks and eggs, a bowl of steaming millet porridge. The hungry children ate sweetly, and Yun Xiao fished out a few eggs from a pot of black water and put them in front of the three children. The skin of the egg is cracked, and it looks like it has been broken. Liu Duan looked at the eggs and hesitated to eat them.

Turning his head to look at Wei Qing, he was used to not knowing what to do to see Wei Qing's reaction first.

I saw Wei Qing happily pick up the egg, and peeled off the egg skin in three strokes. The small mouth kept clicking and eating, and Liu Sheng swallowed and salivaed. Liu Xiaozhu did the same, and his immature little hands quickly peeled off the egg skin, and then couldn't wait to take a big bite. As soon as his eyes lit up in his mouth, he filled an egg into his mouth in three or two bites, and his cheeks bulged like a little squirrel.

Seeing that his younger brother had eaten, Liu Duan also tried to take a bite. I ate a lot of boiled eggs, Liu Duan didn't like to eat this, it didn't taste at all. The palace is full of sauces, and Liu Duan also hates those black sauces.

The taste is very good, and it is still delicious. This made Liu Duan very excited, and when he reached for the plate again, he found that there was no longer anything inside.

"You shouldn't eat too many eggs, just one every morning."

Yun Xiao smiled like Liu Duan explained.

"Master Yun, what is this thing called?"

"It's called tea eggs, and the eggs are boiled from tea leaves, so they taste particularly good."

Wei Qing swallowed the last bite of the egg and said prominently. Maybe it was because I wanted to speak, so I swallowed too quickly and made a very loud snort, so I had to drink a big mouthful of porridge and go down.

No one in the Yun family's meals has ever disappointed, and the four children are very full.

Wei Qing poured the egg skin into a bamboo basket, and then unscrewed a valve on the wall. A stream of water flowed out of an iron pipe, and Wei Qing began to scrub his dishes in surprise.

Liu Xiaozhu also took his leftover food, poured the garbage into the bamboo basket, and then began to wash the dishes with his white and tender little hands on Wei Qing's side.

Although he disdains to do such a subordinate work, water will automatically flow out of the iron pipe, which makes Liu Duan very curious. I looked at the pipe for a long time, but I couldn't figure out why the water would flow out when I twisted the valve. I was embarrassed to ask Yun Xiao, so I had to pull Wei Qing's sleeve and ask.

Wei Qing pointed to the bear who was pressurizing the water, and walked away without saying anything.

Liu Duan looked at the bear under the pressure of the water in confusion, and he didn't understand that this hairless bear had an egg relationship with the water valve.

It turns out that Liu Qi's genes are very good, with Arabic numerals from one to nine. Even the stupidest Liu Sheng learned quickly, but he had trouble reciting the ninety-nine multiplication table. Liu Duan couldn't carry it after a while.

"Why do you want to carry this?"

If the novelty of Arabic numerals could still arouse his interest, then the boring ninety-nine multiplication table did not arouse the interest of the Jiaoxi king in the slightest.

Yun Xiao smiled slightly, took out a few chestnuts and placed them on the table. Two chestnuts are arranged in two rows, two in each row.

"Two, two, four."

Then it was arranged in three rows.

"Three threes get nine."

"Forty-Forty-Six"

"Liu Duan, if you don't master these basic arithmetic knowledge, how can you know how many soldiers and generals you have. How much grain and money do you have in your storehouse? How many chestnuts do you say you will use to fill this table? You don't know, but I know after calculations. This is arithmetic, which includes addition, subtraction, multiplication, and division. A lot of things in this world are calculated, aren't you curious about why there is water in the pipe in the morning? In fact, there is also the credit of arithmetic. ”

Good boy doesn't need to talk nonsense, Liu Duan immediately picked up the ninety-nine multiplication table in his hand and began to recite it.

Yun Xiao had a headache, because he still had no problem teaching some math knowledge. Dahan's level of mathematics is very low, and it is estimated that even after graduating from elementary school, he can be called a master of arithmetic here. But if you want to talk about those ancient texts, this will cost Yun Xiao's old life. Although the Four Books and Five Classics were not promoted in this era, various versions of the books of various schools of thought were widely circulated, and those difficult things Yun Xiao had a headache when he looked at them, not to mention that many seal characters he didn't know.

In just ten days, Yunxiao sadly found that if there was only one teacher. Then you can say goodbye to a happy life completely, there is no laziness to sleep in, and there is no wife to compensate. Lao Tzu just got married, and he doesn't want to live such a life yet.

If you need to find a helper, the old man's pole is a good choice. Although the Liu family now believes in the study of Huang Lao, the Liu family still recognizes the saint of Han Gaozu.

Taking advantage of the two days of vacation for the three princes, Yun Xiao personally went to the old man's house, and his family did not have so many twists and turns. Straight to the point, he explained his intention, and Yan Qing heard that he was going to teach the three princes. Yan Qingzi, who dreamed of carrying forward Confucianism, agreed with his mouth, and even took a few of his brothers-in-law.

Yun Xiao was so happy that snot bubbles were about to pop up, and it seemed that his happy life had been saved.

In the Weiyang Palace.

Today's Weiyang Palace is particularly lively, and the ministers of the Three Princes and the Nine Emperors are basically here. Because the day before yesterday, Lang Guo presented a strange beast, and the legs of this beast were like giant pillars. The ears are like a fan, the nose is several feet long, and the face is bared with fangs. Many people are seeing elephants for the first time, and they are horrified and don't know what to do.

The envoy of the Yoro Kingdom is a lewd guy with a mustache. This guy looks obscene, but he is very arrogant. Sticking his neck, he said that no one could tell how much this elephant weighed. If it can be called, the country of Yelang has been paying tribute since that year.

"Yelang is arrogant, and no one cares about deceiving me. How can the big man allow you to be arrogant. ”

Liu Biao was so angry that he blew his beard and glared, but he couldn't weigh the elephant.

Liu Qi on the Dan is even more of a black line, and a huge court only listens to the roaring sound and does not hear the way of calculation. While the Yelang Messenger was rampant, three children walked out from behind Dan Xi.

"Father, our brother can weigh this elephant."

Liu Qi fixed his eyes and saw that it was the three sons who came back last night. Jiaodong Wang Liu Xiaozhu, Jiaoxi Wang Liu Duan, Zhongshan Wang Liu Sheng.

"Can you really weigh this beast?"

Liu Qi was a little unconvinced, but after going to the Yun family to study for ten days, there was such a big change? It seems that the two big ones seem to know a lot more politeness.

"Father, we can."

The three brothers replied in unison.

"Okay, I'll order your three brothers to weigh the elephant."

Liu Qi was overjoyed and immediately ordered the three brothers to start weighing. The courtiers also stretched their necks one by one, wanting to see how the two princes, who had always been known for their stubbornness, could solve this eternal problem.

"Starling, can you do what you said?"

Liu Xiaozhu asked with some confusion.

"It will definitely work, you forgot what Mr. Yun said about buoyancy, this method will definitely work."

Liu Duan's mind came to mind with Yun Xiao holding an iron block and an iron boat. It was obviously the same weight, but the iron sank into the water, but the iron boat floated on the water. Yun Xiao proudly explained that this is the buoyancy of water. The buoyancy force can be used to measure the weight of irregular objects lightly, which is very simple.

"Ask my father to drive this elephant to the Qujiang Pond and borrow my father's painting boat for use."

"By you, by you. Come on, hurry up and prepare. Liu Qi hurriedly instructed the attendants around.

The animal trainer brought by Yelang Kingdom drove the elephant to the bank of Qujiang Pond, and Liu Qi's huge dragon boat was moored on the pier. Not to mention pretending to be an elephant, it is no problem to pretend to be a whale. However, the elephant seemed to be very afraid of stepping on the dragon boat, hovering in front of the dragon boat and hesitating, no matter how driven by the trainer, he did not take a step forward. The animal trainer was sweating profusely, and the Yelang messenger was urging loudly on the side, but it had no effect.

Liu Xiaozhu suddenly broke free from the hand of the waiter, grabbed a melon on the table and threw it in front of the elephant. The elephant seemed to recognize a melon, and with a roll of its long trunk it stuffed into its mouth, and the juice of the food was dripping. Liu Xiaozhu was overjoyed, and ordered the waiter to bring over a basket of melons and put them on the ground one by one. All the way into the dragon boat, the elephant followed all the way to eat melons, and unconsciously boarded the dragon boat.

Liu Qi was overjoyed, and the courtiers suddenly boiled. The rolling sycophants came to his face, and he said that Liu Xiaozhu was comparable to a pure-blooded Ultraman, and Liu Qi smiled and laughed at it with his beard.

As soon as the heavy elephant stepped on the dragon boat, Noda's dragon boat flickered. The waterline sank sharply, but fortunately, there were only Liu Duan and Liu Sheng on the boat with two guards.

The brothers drew a waterline mark on the bow and stern of the boat. Then he told the trainer to drive the elephant down.

Liu Qi was puzzled and asked Liu Duan: "Wu'er can measure it." ”

"Father, just wait a moment. Ask the emperor to bring some stones. ”