: Extra navigation pioneer Zhou Gongjin

In fact, Li Su didn't know much about Japan's geography in his previous life, and he himself didn't know where Shi Jian Yinshan was, but only knew that he was in the Western Kingdom.

After all, he has played Warring States games such as "Taoge Achievement" and "Nobunaga Ambition", and knows that the city with the most silver mountains in the game is the "Yoshida-gun Yama Castle" of the Maori family.

It was because I was curious about the game, and later I occasionally checked the maps of ancient and modern times, and I realized that Yoshida-gun Yama Castle is the modern Hiroshima Prefecture.

But in fact, Li Su's information he remembers through the game is really confusing. There were indeed many silver mountains in Hiroshima Prefecture during the Warring States Period, but it was not Ishimi's silver mountains.

Ishimi Ginshan is located in Shimane Prefecture in the Nishikuni Mountains, while Hiroshima Prefecture is located in the southern foot of the Nishikuni Mountains. Although Hiroshima Prefecture and Shimane Prefecture are also adjacent, the two prefectures are bounded by the main ridge of the Nishikuni Mountains.

If you want to find Ishimi Ginshan, it is more convenient to dock from the Japan Sea on the north side. You should not look for it on the Seto Inland Sea on the south side.

Of course, Li Su didn't force her to find "Shi Jian Yin Mountain", anyway, it's a Yin Mountain for him.

Since Nobunaga Noburi's Mori family had so many Ginshan, maybe it was the ones close to Hiroshima that were dug first. In the Edo period, only Ishimiyama, which was a little more remote to the north, was left.

Anyway, Li Su's people can only try it a little on the coast first, and refuse to search too much in the mountains.

Seeing that time is approaching winter, the map of the route improvement is done well. The Yinshan Mountain has not been settled for a long time, and Li Su is also a little anxious.

He had only two years to inspect and appease the newly conquered areas, and he still had to go back after the inspection of the emperor. If the discovery was indeed not worth developing after the expiration, the ruling policy of the court would definitely regress from direct jurisdiction to detention.

If Zhuge Liang's road cannot be effective quickly, he will have to rely on Li Su himself.

Now that the first year is almost over, Li Su has to make preparations and find the mountains of gold and silver next year.

Seeing that Yin was not sure, Ishi would find out Sado Kinshan too.

Because Sadojin's goal is definitely clearer, you will know that you want to go to Sado Island to find it, and you will definitely not make any mistakes.

It was a small island on the Japanese sea on the north side of Yuezhou. The most common ones in "Nobunaga's Ambition" are Echinho's daimyo Uesugi Kenshin. Yuezhou is equivalent to the Niigata Prefecture in later generations.

In contrast, the three prefectures in later generations, Hiroshima, Shimae and Yamaguchi were roughly more than 200 kilometers long and seventy or eighty kilometers wide. The plains needed to be removed, and the mountainous areas that need to be searched still had more than 10,000 square kilometers, which was too much to find a needle in a haystack.

The entire Sado Island is only more than 260 square kilometers, and some coastal beaches and swamps are removed. The search area is only 2% of the Ishimi Yinshan search area. If you search carefully, you should be able to search through it in a year.

But the problem now is that Gan Ning has not yet been found out in the map of Yuezhou/Nigata area, and there is no civilized country established by the Fusang people. It is still in the Yokonomiya activity area. Li Su has no reason to convince the public and let his subordinates explore the pure and worthless wildlife area.

After thinking about it, Li Su decided to go in two steps.

He was going to use the excuse of monsoon as an excuse, let Gan Ning or Zhou Yu put down other tasks, and send someone to take advantage of this winter to completely surround the Japanese archipelago to open a map.

...

One day in early October, Zhou Yu took the order to lead the fleet to the near Osaka Bay to transport winter supplies and iron tools to the new colonial site.

Li Su gathered Zhou Yu and Gan Ning together and assigned tasks to them in person, hoping to choose someone who volunteered to open a map further away.

Li Su's temporary residence is the only courtyard near Osaka Bay that is built on a rammed earth platform. There are several entry points. The outside edge of the earth platform is also covered with stone walls, and a water-belt trench similar to a moat was dug.

The purple-built Ematai-Witch Queen Terrace and the so-called queens in Yamato Kingdom cannot have such a noble, dry and spacious palace. For such a building, Li Su just made Fusang slaves build it in three months.

Of course, compared with his Duke's Mansion in Kuaiji or the Prime Minister's Mansion in Luoyang, this place is really shabby and can only be said to be just a matter of making do with it.

After Zhou Yu and Gan Ning met, Li Su made a direct order:

"I need a navy general, leading a fleet of more than a thousand people, and about a dozen boats are enough. Continue to explore the northeast along the coast, and try to sail as far as possible. Until the length of Fusang is explored and it is confirmed whether it is an island."

Gan Ning and Zhou Yu looked at each other. Gan Ning didn't care much about geography and didn't understand the difficulty for a while. Zhou Yu quickly realized the problem and asked for instructions immediately:

"Prime Minister, what if Fusang is not a Long Island, but another continent that is no less than the area of ​​the Central Plains, but also wild? Continue to sail northeast along the coast, and his subordinates will naturally dare to receive orders. But if they cannot find the end, where will they be allowed to turn around? Please let the Prime Minister make it clear."

Zhou Yu was too sensible, and he was also afraid that Li Su would let him sail endlessly, what if he kept going to the end of the world?

Even if you sail on the shore is not dangerous, you will always go to a colder place in Vietnam and North Korea. In the end, it will be ice and snow, and you can’t even get food supplies. If you don’t look back, you will have to freeze and starve to death.

Therefore, you have to let your boss draw a trail and turn back without seeing the end.

Li Su cannot directly rehearse the unknown world, as it will be in trouble, so he can only choose to spend some time first and give Zhou Yu and Gan Ning some basic knowledge and confidence in science - mainly to literate Zhou Yu first, Gan Ning is considered to be the one who is responsible for it.

Because Li Su knew that with Zhou Yu's IQ, it was possible that Gan Ning would understand it. After others understood and implemented it, he would go further regardless of whether he understood it or not.

Li Su went from the perspective of "Why do you see the coming boat on the sea? You first see the mast and then the hull. Why is the higher the hull observation deck, the further you can see?" These navigators can understand and deeply feel the point of view.

Then he slowly spread the theoretical knowledge of "Why the Earth is Round" he taught Zhuge Liang over the years and combined it with practice. During the process, Li Su also combined some written textbooks compiled by Zhuge Liang.

Who made Li Su lazy and not good at writing science textbooks in classical Chinese? So when he taught Zhuge Liang a few years ago, he himself told Zhuge Liang orally, but did not form textbooks. It was Zhuge Liang, the object of being taught, who sorted out the classroom notes and formed the textbooks.

Now that Li Su wants to transfer to others, it is very convenient, so you can just use it.

It feels quite strange that "Confucius holds the written "Analects of Confucius" teaching class".

After Li Su lays the foundation for the basic knowledge, he finally instills with Zhou Yu:

"...So, there are only eighty thousand miles around the earth, and there is no endless saying in the world that the vastness of the earth is. As long as you keep sailing northeast, of course, after reaching the extreme north, even if you don't turn, it will naturally turn south. The so-called extreme north to south-after voyages 80 thousand miles, you will eventually return to the origin.

Of course, it is impossible for today's sea boats to sail 80,000 miles without replenishing fresh water and diet. Even if they load enough supplies, the ship will not be able to hold on and have to repair it, so it won't really let you sail that far.

As long as you are willing to continue voyages to the northeast for half a winter without hesitation, it is estimated that by the twelfth lunar month, the southwest winds and the ocean currents coming from the southwest will definitely become weaker and weaker.

This is similar to the Central Plains. You should be easy to understand Gongjin. It is nothing more than the southeast wind in the Central Plains spring and summer, and the northwest wind in autumn and winter, and here it becomes the southwest wind and northeast wind.

When the wind direction of the ocean currents is completely controlled by the cold wave and the cold current is completely controlled, even if you want to continue to go northeast, it is afraid it will be difficult to move forward, so you will turn back then.

But it is best to see if you can find the end of the northeastern end of the Fuso Island before this. If you find it, then go around the island for a week and try to return from the Fuso Island toward the Whale Sea, and explore more barbaric situations."

The whale sea in Li Su's mouth is the Sea of ​​Japan. The route he requested this time is equivalent to striving to circle the Japanese archipelago at least for one week.

If Zhou Yu could sail further, such as discovering Sakhalin Island or discovering Kamchatka along the Chiba Islands, then Li Su would also like to see it happen, and it would be a surprise.

Li Su's teaching happened to hit the point where Zhou Yu thought he was proud - Zhou Yu is the group of generals who are best at using monsoons in China today.

In history, he was able to burn Chibi, and in this life he still tried to use Li Su's five-tooth warship to use Li Su's five-tooth warship to fight under the terrain and weather that was favorable to him.

It’s a pity that Li Suyou has made a cross-age technology cheat, and Zhou Yu is very good at using wind directions, but it was futile at the beginning.

Now Li Su told him that by studying monsoon ocean exploration, Zhou Yu naturally had great confidence in safety.

No matter what, you can challenge it, at least you don’t have to worry about danger.

After the risk is controlled, the rest is the issue of returns.

Zhou Yu couldn't help but start to wonder, how much benefit would this kind of exploration benefit?

After all, even if there is no risk, it will not be much benefit if it is done, so there is no need to rush to do it. The Prime Minister cannot deceive his superiors and subordinates, because if you do a geographical exploration, you will be given a title to you, right?

Zhou Yu took the next step and expressed his concerns in this regard in a tactful way.

Fortunately, Li Su is also very good at painting big cakes for this issue. The matter of gold and silver cannot be used as an example. Li Su uses the benefits of species discovery to recommend Zhou Yu Gan Ning.

"... Gongjin, Xingba, you should also know that I sent people south to Linyi to find the rice in Linyi. Now, in the Jianghuai land, more than tens of millions of people will benefit future generations.

From this we can see that islands and continents hanging overseas are more or less likely to have crops that are not found in the Middle Earth. If they can communicate with each other and increase their yields and benefit the people, Your Majesty will definitely be a marquis.

This Fusang is an archipelago. Who knows if there is another island north of the main island? The islanders on it are unable to communicate with the Central Plains because the barbarians are not good at building ships. As long as they find any new species, the lonely will naturally ask His Majesty for a ban. If they cannot find it, they will also record your hard work. There is no need to make any money in this kind of exploration."

Li Su did both aspects of reducing risks and exaggerating returns and providing conditions for both, and Zhou Yu finally said that he could take on this long voyage exploration this winter.

Gan Ning was still a little hesitant, mainly because he had a poor geography and did not know how to explore the monsoon conditions in unfamiliar environments.

Fortunately, Li Su is also very good at encouraging people and is good at employing people. He quickly told Gan Ning that the future is long. Anyway, he and Zhou Yu must leave one to guard the current territory and cannot leave. Otherwise, it would be very troublesome if the Fusang people took advantage of the empty military force of the Han people to rebel.

There are more opportunities in the future. If there is a further voyage next year or further in the future, you can set off north in summer. It is not too late to go to Ganning again.

The advantage of Zhou Yu's sailing in early winter is that the risks are controllable, because as long as the twelfth lunar month is coming, the wind direction will definitely change, and you will not be able to return after more than two months of sailing north.

But the risks are controllable and cannot be explored too far. This is a contradiction and unity. If you want the previous advantage, you have to bear the subsequent disadvantages, so you can only summarize your experience simply by trying it out.

If you really want to sail out for half a year at a time, and then return for half a year, you can only leave it to a reckless person like Gan Ning.

Zhou Yu is responsible for the tentative summary, while Gan Ning is responsible for the large-scale in-depth implementation and full play to the fullest.

...

After unifying his thoughts and completing all preparations, Zhou Yu took twenty sea boats and 1,500 sailors from Osaka Bay on the tenth day of October, left the Seto Inland Sea, bypassed the Ise Peninsula, and continued north along the Pacific Ocean.

Although the Japanese archipelago is more than 1,200 kilometers northeast of the Ise Peninsula, you can reach the northernmost end of Honshu Island. Even if you reach the northernmost end of Hokkaido, it is only 1,500 kilometers.

But Zhou Yu didn't know this in his mind. In his eyes, the map was dark, so it took quite courage to sail like this.

What's more, he has to be responsible for summarizing experience and drawing for future generations, so he has to sail near the coast. Many bays have to go around and see clearly and roughly mark them on the map, so that the actual mileage will be much longer.

When he arrived at Ise Bay, which is equivalent to Oharaku, who was Oda Nobunaga during the Warring States Period, and later Nagoya, he went around in a circle. He had to go to Sagami Bay, Tokyo Bay, and Sintai again, and finally he had to explore the Tsugu Strait between him and Hokkaido.

After all, these near-shore detours have at least one-third of their mileage.

After more than a month of sailing north, Zhou Yu traveled more than 100 miles a day. It was only in mid-November that he had thoroughly explored the Tsukaku Strait and confirmed that "Hokkaido and Fusang Honshu Island are indeed two separate islands." It also confirmed that the opposite of the Tsukaku Strait should be connected to the Whale Sea north of the Tsukaku Strait.

At this time, the consumption of supplies was already quite large. More than a thousand people ate at sea for more than a month. Even in the colder environment, vegetables and fruits had been completely eaten, leaving only dry food, salted fish and jerky.

Jelly and salted fish also started to grow slightly worms, so they could only eat it with a hard temper after soaking and boiling. Considering that it would take at least twenty days to return.

If you want to explore in detail, you can return along the side of Honshu Island near the Whale Sea, and you will continue to go around the bay and take a look. That would be even more troublesome. You may not be able to catch it for 40 days.

In the fleet, more than a hundred sailors were killed or injured due to various accidental diseases, and dozens of sailors were also accumulated. Due to the strong winds in winter, they were blown by strong winds during mast operation, accidentally fell into the sea or fell directly to the deck.

Only two or three out of ten people who fell into the sea could recover, and most of them were buried directly in the fish's belly.
Chapter completed!