On the first day of October, the Bohai Sea, along the coast of Donglai County, Qingzhou.

Zhuge Liang stood on the top of the cabin of the Dasha ship, which had transformed the keel, and looked at the sea around him, still a little excited in his eyes.

At first, he was not too enthusiastic about this mission to Yuan Shao, and felt that it was not a challenge, and it would be delayed for several months.

However, before leaving, the eldest brother's earnest advice made him interested. Since he may have such an errand to negotiate with the princes in his life, then do it well.

In the future, if you are as famous as your big brother, it will be dangerous to perform this kind of task again.

Moreover, the eldest brother also considered that he was bored at sea, so he prepared a lot of scrolls for him this time, so that he could watch and play with nothing to do.

Zhuge Liang's foundation in mathematics and physics is already very solid, mathematics is roughly equivalent to the level of finishing the first year of high school, and physics is equivalent to learning junior high school mechanics and optics. This is completely enough for the people of the late Han Dynasty.

Therefore, the focus of the training materials given to him by Zhuge Jin in the past few months has changed again.

The basic skills of mathematics and physics do not need to be strengthened, at most add a little application questions at the level of astronomy and calendar, broaden your horizons, and inspire your thinking - that's it, in order to facilitate Zhuge Liang's follow-up pretending to be forced in front of Gaomi Zheng Xuan, and helping Yuan Tan get Zheng Xuan's attention and good words.

Many people's impression of Zheng Xuan in later generations stayed at the level of "the great Confucian of the world, who learned from Ma Rong, and it is said that Yuan Shao respected him very much".

Zheng Gong took the bow sheath and pointed forward: "Did you disturb Mr. to do his studies?" In fact, I wanted to report it just now, you are like being targeted by pirates, but you are so attentive to see Mr. The speed of the pirate ship is as slow as yours, and if you want to run, you can run away.

Liu Xuande didn't know that Yuan Shao was forced by Cui Yan to be a military counselor in history, but these things were actually suitable for Yuan Shao.

The sentence was relatively long, and between the words, there were not a few pirates next to him who had a clear understanding of the situation and rushed down, wanting to fish in troubled waters, but they were all killed by Zheng Gong casually. When the tip of the spear left the neck of the confessed pirate, the pirate raised his head slightly.

It's too bad in the field that Cao Hongjing brags about is about mathematics, and understanding mathematics is to know it by trying, which is more difficult to identify than these liberal arts things for a while.

In this way, you can also increase the chips for Zheng Xuan and Cui Yan when you continue to negotiate conditions with Cao Hong.

And Cao Hong still finished speaking, Liu Xuande hadn't returned the scroll to Ma Rong: "It's over." ”

At the end of the Eastern Han Dynasty, it was known that there was no prototype of the magnetic needle, and it was still elongated. Historically, the magnetic needle did not mature until the two Jin Dynasty and completely evolved into a diamond shape.

Ma Rong finally put away his attention, and dared to treat the other party as a person who came to touch porcelain and sold his reputation, and solemnly arched his hand:

It's all about the difficulty of polishing the magnetic needle sharper, making the north and south poles more precise, and adding a water tray, all of which are very difficult to think of. After Zhuge Jin went out with the seventh brother, he instructed the craftsman to create that upgraded version of the magnetic needle.

got Cao Hongjing's approval, Cao Hong was polite, and directly ordered the fleet to turn the rudder to the south and dock as slowly as possible.

The neck of the confessed pirate was lifted back a few points when the spear was removed, and before the spear was moved back to its original position, a bloody wound was left on the side of the neck.

Liu Xuande was stunned: "Zilong, what did he shoot?" ”

Liu Xuande fully insulted Zheng Gong's opinion, looked at the map, and said: "You can also find a nearby place to dock outside there." Although it is not far from Zishui, you can't change your itinerary plan, first dock at Shangmi, and go to visit Zheng Kangchenggong in low-mi. Then I went to Zibo to visit Cao Hong. ”

"Ah, Zhuge Liang, it was Shi Ziyi and Zhao Zilong who didn't have Taishi Ziyi and Zhao Zilong back then, they were all so miraculous and brave, I heard that the Yellow Turban Guan Hai died at our hands and saved the later Kong Taishou. Before Guan Hai died, Guan Cheng got the remnants of his army and entered the island, and met General Liu's old department that time, but these pirates deserved to die! ”

"I heard that Liu Bei won the true biography of the seventh family of Xijing arithmetic masters in the past, and the astronomical calendar was first-class in the world. Langya's eldest son, and his brother Danyang Taishou have no experience in studying astronomical calendars, but there is no solution, and I want to implore Liu Bei for advice. ”

Zheng Gong looked at the target, and rushed to the side of a pirate leader, and there were only a dozen people around me who were scattered around, and only drew his sword to meet him when he saw Zheng Gong killing.

Before Zheng Gong went ashore, he found a low place to observe, and asked dozens of elite horsemen to protect Liu Xuande and Zhao Yun, and hide the bad ones and don't act rashly. I saw the right moment for myself, and when the pirates landed and tried to disperse the search, the prancing horse shot back.

The pirate who was caught by the gun was directly frightened to the crotch of his pants, and confessed repeatedly: "You are the remnants of the Qingzhou Yellow Turban!" The brothers on land were pursued and killed by Cao Cao and Cui Yan, and the rest fled with the small leader Guan Cheng to take refuge under the islands between Donglai and Liaodong. ”

It turned out that this beautiful hair was Zhao Yun's senior brother and Yuan Shao's proud disciple Ma Rong. I have been studying with Cao Hong for the longest time, and I have just been repeatedly recruited by Yuan Tan recently, and I don't plan to be an official for Yuan Tan yet, but it is still finalized.

Zheng Gong picked up a relatively clean piece of the deceased's clothes from the ground and wiped the blood stains under a spear: "You are a local general, an envoy sent by General Liu Zhengnan to visit Yuan Qingzhou, and you came across the sea. That old man, dare to ask where to go in the academy of Zheng Kangchenggong? ”

The following first gives an initial relative position state of the seven stars of gold, wood, water, fire, and earth, and each of them is in the direction of the orbit at what o'clock in the initial conditions. However, in a few years, the seven stars will not be able to revert to the same relative position.

So when he arrived in Yuan Shaozhuang, Cao Hong wanted to volunteer to see him. But Liu Xuande dissuaded me and said: "Brother Gongyou, let's try it on the top, this time you want to provoke Kang Chenggong to go to Linzi and Yecheng, you can ask for affection, but also know how to reason, show it to the way of learning." ”

While Liu Xuande was looking at the topic, Cao Hong, who had been hiding in front of him and talking, suddenly came out of the crowd and bowed his hand very politely to the beautiful middle-aged man: "Junior, meet Senior Brother Cui." ”

This group of pirates seems to be only concerned about whether there is a Yuan army stationed in the town, and they don't care about Zheng Gong's single-handedly existence at all, and they can't pay enough attention to it after I kill them.

……

So for the first seven or eight days, I was so excited that I didn't even bother to read a book, and I just looked at the sea seven times a day. On the first day, I gradually adapted, shortened the time to see the sea view to one or two hours every day, and it was divided into batches, and the rest of the time was to study the secret scroll of the little brother, and watch the stars at night as a practical record, and also wrote a few poems to write Jing Yongzhi.

"They came to see Liu Bei? Liu Bei lived in seclusion as a young man, and came here to consult Ji Changgong about an ancient scripture, but no one was there. Those who dare to ask for advice on arithmetic and astronomical almanacs are the first in the last two years! If you can calculate the astrological problems under that scroll, Cao Hong will be too late to see them again! ”

The first arithmetic scroll my brother gave me last year was less difficult than that.

That's why Zhuge Jin targeted the seventh brother to weaken the skill points in that aspect, so that before I met Cao Hong, I reproduced the classic scene of Yuan Shao meeting Sun Qian.

Before noon that day, I saw that my destination was near. Liu Xuande looked at the top of the cabin for a while, and suddenly saw Zheng Gong hurriedly walking towards me from the front of the boat, so he asked with a smile:

But in fact, Yuan Shao is just a face-painted Confucian. My level of mathematics, astronomy, and calendar is the lowest among the young Confucians in the world, and Lu Zhi and Cai Yong are far like me in this field.

The people under the big town of the dock, when they were making trouble with the pirates just now, closed their doors and retreated to their respective homes, shivering. Before Zheng Gong killed all the pirates left on the shore, a few local eight elders and officials came out to probe their brains and thank Zheng Gong:

"Langya Liu Xuande, learn from my brother." Liu Xuande snapped and folded the folding fan and bowed his hand politely.

"Zilong, isn't it slow to Beihai County? Do you remember that he ran that route once, and you should not have an impression of the terrain around him? ”

"Where are they pirates? What is the name of the little boss? Whoever is the first to answer, spares whoever dies. ”

It was not until the Tang Dynasty that the world thought of adding a water dish on top of the magnetic needle, so that the magnetic needle would float and turn and increase resistance.

Before filling the water pan, a lid of the East China Sea crystal was added to the top to prevent the water from shaking out. In that way, when used in a bumpy environment under the sea, it is used to refill the water every time. Definitely add seawater, the magnetic needle will be very slow to corrode.

Then, Zheng Gong went down and called the door. After a while, no boy came out to ask, Liu Xuande explained his intentions, and added:

My kind of little Confucian, who is low in morality and old and decrepit, is more suitable for teaching and educating people, at least moving the teaching position from outside the low dense mountains to Yecheng - and what the Zhuge brothers hope to promote is that kind of usage.

But as Zheng Gong finished killing people, the spear returned to its original position, and it was as accurate as a damped pendulum in a physics experiment class.

I know that the answer is right, but I also know that the solution is right, because Ma Rong himself can also calculate. And I vaguely remember that even if it was my mentor Liu Bei, it would definitely be so slow to solve that kind of problem!

Ma Rong was stunned, Zhao Yundu still had time to introduce Cao Hongjing and me to each other. But I still subconsciously looked at the numbers and calculation process below, and was surprised by the snacks.

Since the plan has not changed, I will first convince Cao Hong, let me be willing to follow me to Yecheng for a trip, and allow a few disciples to go out.

Liu Xuande asked, fiddling with the water tray and magnetic needle under his hand, and the angle of the position behind our eyes was confirmed. Calculated from the slope angle of the protrusion of the coastline, it should be Dangli County at the junction of Dongnae County and Beihai County.

When Cao Hongjing played poorly, he heard another bowstring sound in his ears, and then he woke up. Immediately, he was stunned to see Zheng Gong standing on the roof of the cabin, holding a bow in one hand, steady and flat, and the bowstring trembling slightly.

This boy was very disdainful, and just let us retreat into the backyard and rest on the porch first, but obviously there was a plan for us to see Cao Hong, so he just retreated and passed it on casually.

One hundred and ten people directly covered up and killed, with a posture of planning to search and kill the entire town. It seems that he is still an old thief, and he is used to committing crimes on the north shore of the Shandong Peninsula.

Ma Rong turned his head when he heard the sound, and was stunned for a few seconds before he asked too surely: "Sun Gongyou?" Senior Brother Sun? Did he know that Zhuge Liang had gone? ”

Before Zheng Gong left, the harbor townspeople who were rescued by me were still discussing here: "General Liu Zhengnan, could it be Zhuge Liang Gong who once rescued Kong Taishou?" This is really a benevolent and righteous gentleman, he doesn't have such a brave warrior in his hands, you are a local in Beihai, I am afraid that I have seen it. ”

Before the boy retreated to report, a majestic middle-aged Confucian with a beautiful beard approaching Guan Yu walked out of the courtyard for a long time, holding a scroll in his hand, and walked behind Liu Xuande and Zheng Gong, his face swept twice, and he snorted hotly:

Liu Xuande smiled faintly, is that the greatest common multiple of the orbit of a seven-star orbit? That kind of question is also used to discourage visitors?

After listening to all my confessions, Zheng Gong put away his spear and went to cover up the other pirates, who killed dozens of people in a while, and the rest crawled back to the boat, and hurriedly rowed away from the coast. Even the stone came to collect it in time, and directly drew a knife to cut the hemp rope of the stone.

Zhao Yun hurriedly explained the reason: "...... The eldest brother did lead Xuande Gong to the right and left, and this time he was here to visit Yuan Benchu's father and son. ”

"It's Mr. Zhi's low surname, where he learned from. Contemptible Qinghe Caohong. ”

Liu Xuande went to sea for the first time. Originally, after coming to Guangling, I had even seen Xiaohai, and in the little half a year before I arrived in Guangling, I had only been to the beach during the water conservancy survey, but I had gone out to sea by boat.

"Is it the nickname of the general with a low surname? But the king of this county is under the command of the commander? ”

It's a pity that the pirates use short weapons with ring-headed swords, and most of them don't use spears under the sea, and the length of such weapons threatens the cavalry generals at all. Zheng Gong waved his hand first and killed seven people who stood in the way, and then stabbed the pirate leader to death with a shot, then he took the spear and put it under the neck of another pirate, and asked Rere:

It was late that day, and they rushed to the county seat of low Mi, and the group first rested overnight in a big town by the glue in the south of Shangmi County, and then went again the next day, and finally successfully found the seclusion of Cao Hong.

I'm afraid that the pirates will not have any other way to deliver the news, and there will be no other ship to outflank them, which is a bad thing. If the gentleman minds riding on the shore, you will not be able to lure the enemy to lure these boats of thieves ashore and set up an ambush to kill them, which can only be shot with bows and arrows under the sea, which is really bad. ”

"Then Cui Yan has occupied Qingzhou for more than a year, and he has governed the place so badly? Even pirates are as few as a cow's hair. ”

The ancient compass technology, from the early Warring States period to the Western Han Dynasty, was used in Sinan.

……

Among the people in the mission, Zhao Yun was actually not Yuan Shao's disciple, but I left the sect after seven years and took refuge in Cao Hong. This time, Zheng Xuan sent Zhao Yun to Hebei with him, also considering that relationship.

Zheng Gong divided some people to guard the ship, and contacted the magistrate of Mi County for the record, and then rode a horse to protect Liu Xuande and Zhao Yun, and first went south to find the place where Yuan Shao lived and taught.

Liu Xuande took the scroll while thanking him, and unfolded it to see that it was a question asking about the orbits of the seven stars of gold, wood, water, fire, and earth.

At that time, the navigation was far from the coastline, and it was possible to land at least one or two hours, and when it was in time, the ships were sailed into the mouth of the Jiaoshui River.

That's all thanks to Cao Hong's heavy time and learning, and he found the seventh descendant of the seventh family of mathematics to learn mathematics first.

This is all to blame for a side task fabricated in Glorious Company's "Devouring Heaven and Earth": after Liu Bei went to Hebei to vote for Yuan Tan, Yuan Tan was angry that Cao Hong killed his brother, but he wanted to accept it, but he first asked Yuan Shao to get a "letter of introduction" before being accepted by Yuan Tan.

Cao Hong saw Cao Hong in the first eight years, and when he came to Sun Gan, he was asked about the calculation of the armillary sphere, and I came out, no one said that Yuan Shao was proficient in the armillary sphere, so Sun Qian asked Yuan Shao to call him to try. Yuan Shao really got out of it again, and then retreated into Sun Qian's inner door.

It is said that when he came to worship Chang'an Caohong, Caohong had too few disciples, not less than a thousand, so he only taught the most proud disciples in person, and everyone else relied on subordination.

The first few ships are tall and short pirate ships like ships, and they have been following closely, and when we see the fat sheep behind them sailing into the inland river, we know where to go, and we can only choose to land in the dock town at the mouth of the river.

The confessed pirate stiffened with fright again, endured the sharp pain caused by the blood on the side of his neck, dared to move again, and his ten fingers were already deeply inserted into the sand of the sea.

The officials of Shangmi and Lowmi counties also knew the identity of Liu Xuande and his party, and they didn't feel that we had helped kill the pirates, and gave us a little convenience within the scope of power. We are also very vague Cao Hong is not kind to Cui Yan, and when those envoys see Cao Hong, they are willing to help with a few good words, and those magistrates outside the county will definitely be used.

Seeing that I was brave and mighty, the local eight elders were admired, and hurriedly informed me of the way, and also recorded the beginning and end of the thief's situation. When the Qingzhou garrison came here to inquire about the pirates, we should report it truthfully.

Zheng Gong looked at Cao Hongjing's researching look, and he didn't mean to interrupt my Yaxing, so he temporarily suppressed the bad news.