When it comes to wooden boats, what is the first thing that comes to mind?

Probably the easiest to think of is the more famous galleon in the West in the Middle Ages, this kind of sailing ship generally has four masts, the front two masts are hung with railing sails, which are relatively wide, mainly used to provide power, and the back two masts are hung with spinnakers, which provide power and also shoulder the role of direction control. The standard length of this ship is about 50 meters, there are multiple decks, the whole ship is low in front and high in the rear, it is more suitable for hydrodynamics, the cargo capacity and endurance are not bad, and it was the most powerful ship in the world at that time for a long time.

Spain, Portugal, and England, one by one, were also stained with the light of advanced sail warships, and successively dominated the seas and plundered countless treasures. They even relied on these warships to pry open the door to China, leaving a deep imprint in the hearts of the Chinese people.

In detail, China should be the first country to invent boats, and the earliest boat, the canoe (hollowed out in the middle of a log), appeared in the Stone Age. Sailing boats appeared around 2900 BC and were first used by the Egyptians, while sails were invented and used in China during the Shang Dynasty. Since then, and until the 18th century, sailing ships have dominated maritime transport.

Later, with the influence of geographical forms and cultural differences between the East and the West, the design and construction of ships in the East and the West were also very different. All countries in the Chinese dynasty regarded themselves as the great powers of the Central Plains, and their ultimate goal was to compete in the Central Plains, and they never thought of expanding their overseas territories. As a result, the characteristics of ancient Chinese ships are large, mostly flat-bottomed boats, shallow drafts, heavy loads, many troops and grain, but not seaworthiness, and most of them are inland river ships. We are a big country in the Central Plains, we are not bad! So it has to be big!

The poet immortal Li Baishi said: "The white emperor of the dynasty is among the clouds, and the thousands of miles of Jiangling are returned in one day." The apes on both sides of the strait could not stop crying, and the light boat had already crossed the ten thousand mountains. ”

Although the poet likes to exaggerate, it reflects the speed of the boat on the river. It is good to go with the wind and the water, but it is not easy to go upstream, because of the water flow, the wind direction above the river is mostly the same as the flow direction, and the reverse current means that there is also a headwind, so when the reverse current is down, the sail is lowered, and it is all pulled by human oars or slender men.

Zhang Rou, who came from later generations, must have been quite clear about these problems, and before the appearance of the steam engine, this was a dead knot. However, in order to test the strength of the Mo family elites, Zhang Rou decided to embarrass them.

After the Mo family elite settled down in the Ship Research Institute, Zhang Rou, as their boss, naturally had to take care of it. The whole institute is roughly divided into four parts: living area, research area, experimental area and production area, the development area is mainly used for model production, and the experimental area is a variety of similar small scenes set up with reference to the ocean and river conditions, which is convenient for the experiment of the model, and the production area has not been put into use for the time being, and is mainly used to train apprentices at this stage.

"Uncle He, how is it? Are you still used to living here? Zhang Rou came to the research institute with Xiao Taohong, and asked when she met He Wuji, who was organizing everyone to work.

"Oh, it's my niece here! Don't say it, we are all wild, and at first we were really not used to this kind of day of stretching out our hands and opening our mouths, but now everyone can calm down and tinker with the work at hand. He Wujian stopped what he was doing and hurriedly came over to greet him.

"That's good, you are all rare talents in this country, you should devote all your energy to benefiting the people, and let them do those trivial things. The little girl has something to tell you today, do you think you can gather them all? ”

"That's right, it's time for them to meet you, the big boss, many people only hear his voice and don't see him! Hey! ”

After He Wuji finished speaking, he waved his hand at everyone, and the rest of the people came to Zhang Rou's side one after another.

"Let me introduce to you, this is the famous 'Jinling Strange Girl' in front of you, and she is also your current big boss, we all have to work for her in the future! Let's all come and see us! Let the big boss also know you, come one by one! ”

Dozens of people present came to salute one by one according to their age, and Zhang Rou also returned the salute one by one. These elites who can become the Mo family basically spend a lot of time to achieve something, so they are not young, which also makes Zhang Rou more determined to let them beckon apprentices.

"Meet the little lady, Xiao Ke is so polite!" A young man who walked at the end said modestly and politely.

Zhang Rou thought it was all old men, but she didn't expect a young man to appear in the end, so she couldn't help but light up, so she asked curiously: "Mr. can be favored by Uncle He at a young age, I guess there must be something extraordinary!" I don't know the honorific name? ”

"You're ridiculous! Xiao Ke's surname is Jia, a single name is a constitutional character, please advise! The young man replied modestly.

"Jia Xian? Could it be...... It seems that he is also from the Song Dynasty, is it really him, how can this person in front of him not look like it! Whatever, try one or two first, if it's true, my aunt and grandmother will make a lot of money, oh ho! Zhang Rou rolled her big eyes and looked at the young man in front of her, muttering to herself.

"Little lady?" Jia Xian looked at Zhang Rou staring at him in a daze, wiped his cheeks, and shouted embarrassedly with a red face.

"Ugh! This one...... That one...... The little woman was rude just now, and I hope Mr. Jia will forgive me, but I don't know which aspect Mr. is proficient in? Zhang Rou came back to her senses and pretended to tidy up her clothes that were not messy to resolve the embarrassment in front of her.

"I'm ashamed to say this! Xiaosheng once studied under Mr. Chu Yan to learn the "Nine Chapters", "Ancient Seizure", "Fixation", and "Island" scriptures, and gained a little. After the teacher went to Beijing, the students only studied with He Lao, and they still know very little about the organs! ”

"Xiao Jia, don't be presumptuous! Don't listen to his nonsense, niece, he's just very modest. To tell the truth, before I found you, the old man planned to pass on my position to him, although he didn't know much about my Mo family's organs, but his own understanding was very good, and the old man also took a lot of effort to ask him from his master. He Wujian blushed when he saw Jia Xian talking to a girl, and he couldn't stand it anymore, so he had to interject.

Although it is only a brief and fragmentary introduction, Zhang Rou can basically determine that the person in front of him should be the founder of the famous "Yang Hui Triangle". Speaking of the "Yang Hui Triangle", for most people may only have heard of it, but Zhang Rou is from a financial background, and her mathematical skills will definitely not be bad, so she is naturally familiar with this sage in mathematics in Chinese history.

At this time, he had not yet created nine volumes of "The Yellow Emperor's Nine Chapters of the Calculation of the Scriptures", two volumes of "The Ancient Collection of Algorithms" and "Release of the Lock", etc., and it should be said that it was still in the gestation stage. And in some places, there is still more accumulation to learn, and the Mo family is the best group of researchers, which is also one of the reasons why he stayed in the Mo family.

The arrival of Zhao Zhen brought the mathematical knowledge of later generations to the Song Dynasty, coupled with a series of changes, Jia Xian's teacher Chu Yan was originally in Si Tianjian, and he joined the Royal Research Institute, and it was inevitable that he would come into contact with these advanced knowledge. The relationship between teachers and students in this era is still very iron, Chu Yan discovered these novel knowledge, and the first thing he thought of was his apprentice, so he sent a letter to his student and invited him to come to Beijing. The reason why he didn't send books directly was because Zhao Zhen considered that these too much advanced knowledge should be mastered by his own people first, and could not be casually exiled, so he still made certain restrictions on the spread of books.

After receiving the teacher's letter, Jia Xian was also very yearning, although the letter did not go into detail, but between the lines revealed the breadth and profundity of the new learning, which attracted him very much. But the ink master is also a representative of righteousness, He Wuji took him well, so he never made up his mind, so he was coerced to Jinling.

"It turns out that Mr. Jia is still an arithmetic student! Amazing, amazing! Zhang Rou praised this strong guy who was more than ten years older than herself, and everyone was embarrassed.

"No, no, Xiaosheng just knows a little bit about the skin!" Jia Xian hurriedly waved his hand to deny it.

His longing eyes quietly looked at the north, his expression was excited and lost, and he only heard him say: "If you want to say that everyone in arithmetic should be the saint today, even the teacher's letters are also very appreciative of the saint's new learning, but unfortunately the profound and unique knowledge about arithmetic in the holy new school is preserved in the Jingshi, and what has been passed down is just some popular knowledge." ”

"Do you mean that Mr. Listen wants to learn the arithmetic of the saints?" Zhang Rou asked softly.

Jia Xian blushed and nodded embarrassedly.

"Huh! You don't have to be embarrassed, it should be the little woman who disrupted Mr.'s itinerary, but if you want to learn those advanced arithmetic, you don't have to go to Jingshi! Zhang Rou said with a smile.

Hearing this, He Wujian and Jia Xian both looked at her with blank eyes, but Jia Xian couldn't help but ask: "Xiaosheng heard that Xinxue is a gift from heaven by the saint and is unique in the world, what does the little lady mean by this?" ”

"Uh-huh! It is right to say that the Holy God is a gift from heaven, but this uniqueness is still up for debate! ”

"Is my niece saying that there is anyone else who understands besides the saint? So where is this man? ”

"Ho ho ho! It must be far away in front of you! ”

Jia Xian and the others didn't care too much about Zhang Rou's funny appearance, but hurriedly looked around, trying to find this "person in front of them". However, the two were disappointed, in addition to the Mo family who knew their roots, there were only Zhang Rou's master and servant left, and Xiao Taohong was naturally ignored by them, of course, Zhang Rou was also placed in the second place that was ignored.

Suddenly, the two of them looked at Zhang Rou at the same time, looked up and down, their expressions were extremely surprised, and they all said in unison: "This person can't be you, right?" ”

"Ahhh What kind of expressions do you have! Why can't it be me? Zhang Rou clenched her little fists, pouted, and said coquettishly.

"Ahh It's you! Please forgive me for being clumsy, I don't know Mount Tai with my eyes, please bear with me! Jia Xian was taken aback and felt that it was inappropriate, and he lost his gentlemanly demeanor, so he hurriedly apologized.

"Forget it! This girl is just joking with you, and none of you have any humor. However, Xiao Jia, do you really want to learn? ”

"......" Hearing Zhang Rou's strange name, Jia Xian turned his head in embarrassment, pretending not to hear.

"Talk about you! Don't be embarrassed! If you want to learn, this girl can teach you drops, but ......," Zhang Rou stretched out her Qianqianyu and pointed at Jia Xian and said.

As soon as he heard that he could learn advanced arithmetic, Jia Xian's attitude immediately took a 180-degree turn, and he asked respectfully: "If you have any requirements, just mention them, Xiaosheng will definitely do it!" ”

"Well, it's not a big deal, you just need to worship this girl as a teacher." Zhang Rou said playfully.

"This ......," Jia Xian said with a slight hesitation.

"How? Is it a shame to worship this girl as a teacher? Tell you, this girl has more than one apprentice, how many people beg to be my apprentice, but this girl still doesn't agree! It's a big deal to let you be a third apprentice, how about it? Little brother, this condition is good enough, consider it! Zhang Rou, who had nothing to do, found it quite fun to tease these simple handsome guys in the Song Dynasty.

"Three...... Three apprentices, what are your two apprentices doing? Jia Xian said that he was very hurt today, and he was actually bullied by a girl who was younger than himself, how can this world make sense.

"Speaking of my two apprentices! The talent is worse than yours, the eldest apprentice learned to cook with me, and now he is helping me take care of all the restaurant business. Second apprentice, then he manages a little too much, raising tens of thousands of domestic animals! He made all the chicken, duck, and fish you eat these days. How's that, awesome! ”

"Alright! All right! Niece, he's thin-skinned, so don't tease him. Or rather, exactly! You say you're going to a new school, but is it true? He Wujian looked at the two of them funny, and it was quite funny, but when he saw Jia Xian, whose face was flushed, he still had to stand up and relieve him.

"Indeed!" Zhang Rou also said.

"But you're still so young, how can you ......" He Wuji still felt incredible, even if you beat your mother's womb and learn it, it's too late.

"This is a heavenly opportunity, and it must not be divulged!" Zhang Rou shook her head and pretended to be mysterious.

Unexpectedly, Jia Xian suddenly rushed in front of her and made a big salute.

"Yikes! What are you doing! Surprise me! Zhang Rou was suddenly shocked by this scene, patted her chest and shouted loudly.

"Master! Teach me! ”

"Aren't you afraid to be a third apprentice?"

Jia Xian shook his head heavily, for a persistent person, a person with pursuits, let's play with dignity!

"Well, that's good, what a good one! And go back to the house with the teacher to get the arithmetic books, and ask the teacher if you don't understand something! Of course, Zhang Rou has not been in vain over the years, and she will definitely transcribe some knowledge of later generations on paper when she still remembers, at least she can't live up to her hard work.

"Master Xie!" Jia Xian was happy this time, and willingly made a big gift.

"By the way, Uncle He, I almost forgot the purpose of my visit today. Now that the institute is almost ready, your first task is to see if you can build a better boat for going against the current. Zhang Rou walked a few steps, and suddenly turned around and said to He Wuji.

"Okay, the old man will give the order!"

Seeing Zhang Rou leave with Jia Xian, he stood alone for a long time, and sighed long: "How do you say that...... By the way, is this the rhythm of losing the lady and breaking the army? ”