After writing to inform the eldest brother, saying goodbye to his father-in-law and mother-in-law, receiving a reply from the eldest brother, packing up the soft and soft, and bidding farewell to Zhuge Jun, who was determined to stay in Longzhong to farm, after completing all the necessary things, the Zhuge family took a boat down the river and went to Wu County, Jiangdong, and defected to Zhuge Jin, who was then Sun Quan Changshi (an official position of the nature of a staff member).

"Lyle, what are you thinking?" Zhuge Liang, who wanted his son to return to the cabin to avoid the cold, noticed that his son was looking up at the night sky with a focused expression, and his heart moved, and he couldn't help asking.

"Daddy?" Lyle looked back at his father, who was out of the house, dressed more fluttering than usual, and continued to look up at the sky, "I wonder if the compass can only determine the course of a ship, but not the position of a ship, and whether it can be determined in other ways." ”

During the Warring States Period, someone invented Sinan, and Yang Gong in the Han Dynasty invented the compass...... Although it was originally intended to be a feng shui, it has been applied to many aspects such as navigation and marching.

"Where is the ship?" Zhuge Liang has mixed feelings in his heart, the joy is that his son has thought of the inevitable problems in the process of sailing, and has the qualifications of a practitioner, not an idealist who will be crushed by reality sooner or later, and worried that his son is going farther and farther on the road of One Piece, and there is no sign of turning back at all.

Sure enough, if he gets mixed up in Dongwu in the future, he must die to kill Gan Ning, a good Qilin'er wants to go to sea to be the king of the pirates every day, it must be his pot.

Lyle stretched out his hand to the stars hanging high in the night sky and said, "Whether it is 'the sky is round and the earth is round', the sun, the moon and the stars are still rising in the east and setting in the west, if I point to the sea level with one branch and the other to the same easily identifiable star, there should be a difference between the observation in the south and the north." ”

“…… Indeed it is. Zhuge Liang thought about it quietly and was shocked by this reasonable inference.

In this era, there was no 'astrology', and if there was no compass in the voyage, the direction could be indicated by the position of the North Star, but that could not confirm the position of the ship.

"However, even if this measurement is possible, and even a set of tools can be made specifically, I don't have the exact data." Lyle said helplessly.

If we could know the laws of celestial motion, this data could actually be calculated, but now Lyle can't even figure out whether the earth is round or square, and the calculation will definitely not be possible, so he can only use the pragmatic technique that the Oriental people are best at - summing up experience.

Even if you don't know how you came up with the conclusions, it's enough to know the conclusions, and sometimes you create jargon to cover up your ignorance.

Zhuge Liang, who was crushed by his son's IQ once, was a little heavy, but what he should do would not change: "...... Fathers can help find people to conduct the experiment. ”

"Really!?" Lyle smiled, it was naturally good to have someone to help, but he quickly hung his head again, "...... Unfortunately, this measurement method seems to only confirm the position in the north-south direction, so how to determine the position in the east-west direction? ”

Zhuge Liang thought for a long time this time, but didn't get an answer, so he could only shake his head: "Jiangshang is wet and cold, let's go back and rest first." ”

"Yes......" Lyle stood up and walked back dejectedly, just before he could get into the cabin, his self-talk leaked out, "Even if you know the north and south positions of the ship, and you don't know the east and west positions, you can't draw a short version of the world map." ”

“！” Zhuge Liang was once again frightened by his son's ambition.

——————————————————————————

The journey was safe, and the Zhuge family arrived in Wu County.

Although Zhuge Jin is only a long history and is not a high-ranking official, he is broad-minded, gentle and honest, and is deeply trusted by others. In addition, he knows how to protect himself at work, never works against Sun Quan, and if he has an idea in his heart, he will slowly change his method to persuade Sun Quan, and if he can't be convinced, he will be promoted and make a fortune sooner or later.

With the recommendation of his very popular eldest brother, Zhuge Liang showed off another wave of overall views, which made Sun Quan shocked and quickly entered the power structure of Eastern Wu. Of course, at this time, Dongwu, which was full of talents, could not give Zhuge Liang a chance to play unrestrained, but gold would shine wherever it went, Zhou Yu quickly discovered Zhuge Liang's talent, recommended a wave to Sun Quan, and the position was raised again.

If Sun Quan is passing the practical examination of Zhuge Liang's talents, then Zhuge Liang is also confirming Sun Quan's personality through personal interaction, although he doesn't mind Sun Quan destroying the Han Dynasty and becoming emperor, but it will definitely not work to hand over gunpowder to Dong Zhuo such a tyrannical person.

Fortunately, the current Sun Quan is not a faint monarch with a changeable temperament and slaughtering direct courtiers, but a promising monarch who is generous, benevolent and decisive, advocating chivalry, cherishing his subordinates, advocating thrift, cherishing people's power, and humorous and funny, and it is not far from the day when Zhuge Liang sacrifices black powder.

During this period, Huang Yueying tried every means to purify saltpeter and sulfur, but there was little progress until she consulted the alchemy priests in the Jiangdong region, and learned the method of "decoction>evaporation, concentration> recrystallization" to purify saltpeter, and "oil frying" to purify sulfur, which improved the power of black powder, but it was obvious that there was still room for improvement.

And Lyle grew up from eight to nine years old, and was given a round of etiquette courses by Huang Yueying, and he can maintain the model of a child of an official family in front of serious occasions, but he is still a bear child who begs to be beaten in his bones, and if he wants to be stable on the outside, it will take at least another four or five years.

As for the knowledge course, Lyle likes and dislikes clearly: let him learn the Four Books and the Five Classics, he relied on his natural ability to remember rote memorization, and he also humbly accepted the great principles that led people to goodness, but if he was asked to chew words and write splendid articles, his enthusiasm for learning immediately became less than one percent; let him learn the art of war, and he didn't have much interest, and his enthusiasm for learning was about three or four percent; Let him learn the craftsman skills of all walks of life, and immediately learn full of enthusiasm, sometimes learning addiction, and will take the initiative to give up the time to go out to play.

However, there are also some courses where Lyle is full of enthusiasm for learning, but he can't learn anything well-

"Lyle, let's stop here for today." Huang Yueying looked at the arrow that couldn't even touch the edge of the target, and fell to the ground in the middle, and said with a wry smile.

"One more time!" As if he didn't feel that he had a lot of food, Lyle rushed over to pick up the arrow, pulled out the small bow specially made for children, tied the string, and let go.

The bowstring resets, and the arrow falls freely at the foot.

"............" Huang Yueying decided.

After studying for a year, archery will never be missed, the sword will fly out when practicing swords, and there is always a feeling that I am about to be thrown off the horse when riding a horse.

Well, it's better to give up the six arts of the gentleman or something, don't want to go hunting in this life, anyway, this talent is enough to be a technician.