After realizing that the means of finding isolated islands on the ocean mentioned by Zhou Yu were very important, Li Su immediately asked Zhou Yu very politely if he had any such birds.

Zhou Yu said that he would come to the Prime Minister's Office to teach next time and would give him the ones he brought to Beijing to the Prime Minister for appreciation.

So, a few days later, one day in early July, Zhou Yu was ready to visit the Prime Minister's Mansion again, and brought something Li Suyou wanted.

Zhuge Liang also asked about the days in advance, and came to watch the fun early in the morning and studied humbly.

After receiving the bird given by Zhou Yu, Li Su had watched a lot of "Animal World" in her previous life. After careful observation for a long time, she realized that this was the warship bird that was often raised by modern naval powers.

The Frigate Bird is the fastest bird in endurance flight, with an endurance speed of more than 150 kilometers per hour (sprints are not fast, falcons and swifts are sprinting much faster, but those are mainly diving and cannot fly endurance, and the Frigate Birds are gliding).

The flight is high and the eyesight is good, so the island 500 miles away does not reach the shore in an hour and a half, and the sea boat may drive for two days.

This kind of bird is indeed raised among the South Pacific islanders. Before Li Su traveled through time, he had watched Disney's 2016 anime movie "The Legend of the Sea". That movie is quite research-based. Isn't there Polynesians raising warship birds?

With the range of warship birds, it is normal to fly around and spread across the entire South Pacific islands and spread to the archipelagos in Southeast Asia.

After understanding the principle clearly, the other generals were amazed. Only Zhuge Liang, who likes to use his brain, thought of another possibility and wanted to further optimize it.

He proposed: According to this principle, using "Black Li" with significantly stronger endurance to navigate will not make it more convenient to find land? Maybe you can find land thousands of miles away or even farther away.

(Note: There is a character with the shape of "left black and right Li" in the Han Li library. It no longer exists in the modern Chinese character library, which refers to the ancient name of albatross by the Han Dynasty. Because albatross can fly across the ocean, it has been suitable for temperatures all over the world since ancient times. In the pre-Qin period, there was albatross on the shore of the Yellow Sea.)

Zhou Yu was questioned by Zhuge Liang's assumption and didn't know how to argue.

Fortunately, this question involves some common sense. Li Su read "Animal World" a lot in his previous life. He keenly pointed out the loopholes in Zhuge Liang's idea:

"This is not possible. The endurance of the 'Hei Li' (Albatross) is too good. Its flight range is far beyond the endurance of the human fleet, so it is meaningless.

For example, if a human ship follows this type of bird, it happens that the bird does not intend to find an island to rest in the middle and wants to fly directly across the ocean. Wouldn’t the people who follow it all starve to death and die of thirst on the way?"

Zhuge Liang was stunned, and then suddenly realized that Master Li was still a master of knowledge.

This does not mean that the further the cruise radius, the better, the key is that it is still suitable for humans.

Li Su knew that albatross could fly across the Pacific Ocean without looking for land, and then the endurance was almost the same as that of the Boeing 747. How could you follow?

Therefore, it is best to find a bird with a lasting endurance that is exactly the same as the range of a human fleet for a few days and observe the instincts and is keen enough. After all, the warship birds are just used together. The survival instinct summarized by the Polynesians for thousands of years makes sense.

Li Su finally made a decision: "Have more of this kind of birds. Ask the barbarians in Yizhou to buy them and tell them to exchange for one of them for 10,000 kilograms of iron. The court wants to raise birds themselves and reserve them for the navy in the future."

Zhou Yu said he would take the order to do it.

Finally, Li Su took the chart marked by Zhou Yu and confirmed the practical effect of the island-finding technique they learned from the Polynesians.

He pointed to several islands in the Liuqiu Islands and asked Zhou Yu how he looked at the cloud positioning in the first place and whether he had encountered any difficulties during the actual operation. He also asked him if he had found any land that had not been recorded in other Han books.

Zhou Yu really pointed out a few points, such as he pointed to some small islands six or seven hundred miles south of Yizhou, pointing out that those places were unrecorded, and they were completely found by him after learning the barbarian island searching technique.

Li Su looked at the map and thought to himself whether Zhou Yu found the Philippines, but now there are still savages there, and Zhou Yu has not fully explored it, so he doesn't know how big the Philippines is. There are only a few small islands on the map, and there is no time to outline the entire area.

Of course, when Zhou Yu first discovered that there were islands south of Yizhou two years ago, he had no shortage of land for the time being, so he did not explore those barbarian islands. He just built a simple pier when he arrived on a cruise to stop and trade with local barbarians.

Zhou Yu did not expect to get any scarce supplies in the trade with the barbarians at first.

After all, the barbarian races on those islands should be the same as Yizhou, with their original productivity being there. Zhou Yu’s main purpose is to collect information first, understand local products, and keep a backup plan.

However, after a little trade, Zhou Yu discovered the unexpected surprise that the islands seemed to have valuable products. For example, although the barbarians did not master the metallurgy method, they could use natural honeycomb copper blocks to polish them.

There is indeed a relatively pure natural elemental copper in nature, either the copper oxide copper sulfate, or more than 90% of copper, accompanied by four or five percentage points of rocky carbonaceous impurities, four or five percentage points of zinc, iron and silver.

Zhou Yu was curious at the time, so he asked the expedition team to collect information in depth and found that the copper should be very rich in that place. After all, there are almost single-quality natural copper, so there must be a lot of copper.

He originally thought that if he could not be pardoned by the court, or if Sun Quan wanted to escape overseas, there would be a place to stay in the future because there would definitely be no these islands on the charts of the Han Dynasty, but there were in Yizhou.

Therefore, if you escape to Yizhou, you may be attacked, but if you escape south, you will never be discovered by the Han people.

However, in the end, Zhou Yu chose to surrender, so he revealed this trump card to show his sincerity to the court.

After hearing these explanations, Li Su knew that Zhou Yu had discovered the Philippines and wanted to be a backup plan to escape, but in the end he was useless.

After all, the plate joints on the first island chain, volcanic islands, gold, silver, copper and mercury are all very rich.

From a geological perspective, this is also easy to understand. Because these heavy elements actually contain not low content inside the earth, they only seem to be cherished by sinking heavy elements and having little content on the surface of the earth's crust.

So according to plate drift, at the joints of the plates, earthquakes squeeze the lower plates up, and there are a lot of gold, silver and copper inside, and volcanic eruptions can directly bring gold, silver and copper in the mantle to the surface. Japan has a lot of gold and silver, while the Philippines has huge copper ore, which are all common sense in later generations.

The Philippines' copper reserves discovered by later generations exceeded 5 billion tons. However, the Philippines' mining industry was not developed until the beginning of the 14th century, that is, in 13XX. It was about decades after the demise of the Southern Song Dynasty, mainly due to exiled Han immigrants who fled overseas after the demise of the Song Dynasty.

After all, it was the first time when the Song Dynasty was destroyed, the Han regime was completely completed in the Central Plains. It was ruled by foreigners, and there were still many Han people exiled overseas. Before, the people were too lazy to go out to exile overseas just to change the emperor and ruler.

But all of this originally had to wait for another thousand years. Therefore, in the late Han Dynasty, the Philippines is really a complete settlement of savages.

The situation in that place is different from other parts on the mainland in Southeast Asia. Today, the Philippines does not have any national civilization, only tribes of the South Island people in the Pacific.

After roughly recalling these historical outlines in his mind, Li Su suddenly remembered a question, that is, the naming of the land in the ancient Han civilization circle.

After all, the Philippines is a place name chosen by Westerners, and the Han civilization initially named it Luzon, but "Luzon" is actually a word that comes from "Live in Song Dynasty".

Historically, after the Mongol Yuan destroyed the Song Dynasty, Song Prime Minister Chen Yizhong fled to Vietnam and wanted to organize an anti-Year Plan. Most other Han people went south to exile, so the Philippines had a high connection with Han civilization. The exiles who were mourning their hometown were named "Lai Song".

Li Su felt that since Zhou Yu discovered that land more than 800 years ago and established trade, it was called "Traveling Han", which meant that the Han people had been exiled and lived overseas due to war in the Central Plains.

...

In the following months, Li Su was in Luoyang, and basically this rhythm of life and study.

Every day, one-third of the energy is spent on cooking simple government affairs and managing them. The remaining main energy is to hold salons and hold symposiums at the Prime Minister's Mansion to discuss navigation and supporting farming techniques.

Anyway, the world is peaceful, and there is nothing to do during the rest and recuperation period. For the time being, everything is aimed at accepting Gongsun Du’s territory in the future. How to do it will help to achieve this better and faster? No cost is spent, then you can go.

Several months passed by, and in a blink of an eye, the Mid-Autumn Festival was over in Luoyang. It was almost September and the weather became cooler.

The court's five-year war bond issuance has finally reached its last year, and the issuance volume this year has dropped to 5 billion, which is a smooth transition.

After all, I sold 10 billion yuan the year before. If it dropped sharply to zero this year, I am afraid that the fiscal fluctuations will be too severe and that expenses and tax cuts everywhere will not be able to hold on.

The issuance work is also progressing smoothly, which shows that the court's credit is still at its peak, and the civilian tycoons are still actively subscribing.

After selling out 5 billion, Liu Ba, the Minister of Finance, announced that he would stop selling next year, and wait until the stock in the market is copied and digested, and then it will be used by merchants every year.

The industrial and commercial tax and bond matters have been successfully understood, and everything has been promoted smoothly in the agricultural tax and corvee. In 203, the Kanto region is still exempt from agricultural tax, but Kansai and Yangzhou have already been levied.

Those areas have been under Liu Bei's rule for many years and have recovered well, so they just celebrated the reunification of the world and exempted tax for one year. It is already very favorable, so of course they have to pay again this year.

There was no dissatisfaction or friction in various places. The switch was smooth and it was basically collected locally in winter.

In peaceful times, the most important administrative work in the year was tax, money and food. After this was stabilized, the office pressure of the court was greatly reduced, and there was no need for Li Su to deal with it himself.

Li Su asked Liu Bei for a few months off as planned, and Liu Bei also made an appointment, starting from October and until the end of the year.

Then, without any surprise, he gave him an edict. From the first month of next year, he would appease the affairs of the four prefectures of Qing, Xu, Yan and Yang in Guandong, further eliminate the remnants of secretly supporting Cao and Yuan, and prepare to farm and cross the sea to deal with Sanhan.

Of course, the Governor's term of office for several state affairs is one year, but it can be an additional one year after expiration.

The world was decided at the beginning and people needed to take charge of the newly occupied areas. This was also the story of Zhou Gong's division of Shaanxi. However, now it is not divided into Shaanxi. The geographical dividing line divided by this governance area has pushed at least seven or eight hundred miles eastward, not including north of the Yellow River.

In addition, if the Prime Minister is outside, he will keep some family members in the rear as usual, but it will not be called hostages, which is too unpleasant.

Liu Bei was actually not worried about Li Su, but he was also for the sake of institutional construction. If he made an exception to Li Su, he would seek to make an exception in future generations.

So the final result was that Li Su happened to leave Cai Yan in Bianliang, Chenliu County, and then left the second son of Cai, who was born to him and Cai Yan, in Bianliang.

After all, it’s 203, and the New Year is 204. His father-in-law Cai Yong has lived a full twelve years longer than the original history.

Although Cai Yong was killed in prison in history and did not count as a natural death, he was a sixty-year-old. Living twelve years later means that Cai Yong was seventy-two years old after the New Year, and the limit of his natural life expectancy was approaching. Even if Li Su had not lived well in life and was good at health in recent years, Cai Yong would not have lived that old.

A few months after Liu Bei destroyed Cao Cao, when Cai Yong was 70 years old, he entered a state of complete retirement after attending the court celebration for the last time. He returned to his fiefdom Chenliu County. He stayed in the Duke's Mansion in Bianliang County and never left the door. From then on, he retired. Calculated his life. Cai Yong had been living like this for almost two years, and his health was declining.

Cai Yong even gave his daughter the final work of writing books. Fortunately, he had already finished writing all the foreseeable parts of "Records of the Grand Historian" before he completely retired.

Whether to fabricate and revise and improve it in the future depends on whether Liu Bei's martial arts development has exceeded Cai Yong's presupposition imagination. This job has no end, and you have to cooperate with military strikes and write while fighting, so Cai Yan can also do it.

For example, Cai Yong has compiled all the ethnic groups on Sanhan and even Tsubasa Island on Tanluo Island, and has also polished a lot of details and historical materials to write them with a slight and eye-catching way. But this writing method is based on the situation where Liu Bei only fought Sanhan until the future.

If you accidentally chase after Gongsun Du when you are pursuing Gongsun Du, you have to edit it further. This is not something that Cai Yong can see, so you can only let your daughter continue writing.

As the prime minister, Li Su could not be bound by his family if he wanted to be a foreigner. Fortunately, he had been married to Cai Yan for fifteen years, and the old couple had nothing to do with him. Cai Yan decided to stay in Bianliang and give his father a care for his old age and see him off. I will talk about other things later.

Cai Yan has a clear understanding of his father's health, and knows that it is not an incurable disease, but the time is right. Moreover, it is said among the people that Confucius died in 73 years and Mencius died in 84 years. These are two hurdles, especially for the sages.

Cai Yong probably couldn't survive Confucius' lifespan.
Chapter completed!