The sky is blue and the water is clear.

After the excitement of the first day or two, Cheng Chumo began to feel bored.

However, Tuesday Fu was excited.

"Lord, I just went to the ship of the Japanese people for a long time, and found that the navigation skills of these Japanese people are actually not very good. From Dengju to the Wa Kingdom, they could go directly to the east, but they had to go north, first to Goguryeo, and then all the way south along the coast, so that the voyage was actually at least one-third longer. ”

"From Dengju to Goguryeo, the fast is three days, and the slow is four or five days, and this route is relatively mature. And along the coastline from Goguryeo to the Wa Kingdom, it is also a mature route, and once something happens, it can be quickly docked, which is probably the reason why the Wa people were able to reach the Tang Dynasty smoothly with simple ships. ”

In this era, not to mention the production of advanced ships such as flying clippers, even if it is a large merchant ship common in the Tang Dynasty, they can't make it.

Before, everyone was just because they had never been to the Wa Kingdom, and after all, the paper talk and the actual operation were different, even if there was a system blessing, it was the same.

However, Li Kuan believes that when he returns from this voyage, there will be a rapid change in the navigation level of Zhou Fu.

"Sailing on the sea, relying on the stars to set the direction at night, and looking at the sun during the day, the Japanese people don't even have a decent compass. Lord Wang, I think your compass is too easy to use, much better than the Sinan I used before. ”

Tuesday Fu couldn't put down a compass, and these days, he even has to hold it when he sleeps.

There is a "ladle of Sinan, cast on the ground, and its guide to the ground", which shows that the Chinese ancestors began to use magnets to make Sinan, that is, the compass, a long time ago, but the accuracy is far less convenient than the one that Li Kuan exchanged from the system.

"This route, since we have opened it, we will use it in the future. Goguryeo's ginseng and the gold and silver of the Wa Kingdom are actually promising. ”

In the past two days, Li Kuan has also been considering the significance and methods of developing maritime trade.

For Dengju, Goguryeo, Baekje, Silla, and Wa are the four most recent countries, and if you want to engage in maritime trade, you must first start from these places.

Especially in Goguryeo and the Wa Kingdom, Li Kuan felt that it was necessary to pay attention to it.

"Lord Wang, don't worry, I record the logbook every day, combined with the chart you gave me, and finally determine a fixed route."

……

"Today is the third day of the seventh month of the seventh year of Zhenguan, southeast wind, level three, sunny.

The fleet has been out to sea for the third day today, and I took the new type of clipper with the prince, which is faster than the other in the same boat, and in order to keep the boat at the same speed, we only raised two sails today......

Yang Qiwa sat on the deck with a serious face, recording today's logbook.

The day before going to sea. Li Kuan and Zhou Fu teamed up to explain some precautions to the main crew members, and for the crew members who had learned the basic common words in the night school, Li Kuan divided enough paper and pen to encourage everyone to record the problems found during the voyage.

Among them, the logbook is what Li Kuan wants everyone to record.

To open the Age of Discovery of the Tang Dynasty, it is impossible to accumulate a little.

Guangzhou, Quanzhou, Mingzhou, and Hangzhou, as the main foreign trade cities of the Tang Dynasty, have a little understanding of the situation in the South China Sea, but the vast East China Sea and the Bohai Sea are very few recorded.

Since the system of gnawing dad forced him to go to the Wa country, he had to give full play to the value of this trip to the sea.

"Lord Wang, Inoushang just said that there is still half a day to go to Seoul, replenish fresh water and vegetables there, and then go south along the coast, and then go northeast, and you will be able to reach the country in about ten days."

Zhou Fu was worried that Li Kuan would not be used to staying on the boat for a long time, after all, the boat could try not to make a fire if it was possible, and it was basically impossible to take a bath or something.

"Seoul?"

Hearing this somewhat familiar and somewhat unfamiliar name, Li Kuan frowned and thought of many things.

The Tang Dynasty was established by stepping on the bones of the Sui Dynasty, and why did the Sui Dynasty perish?

The most direct reason is that Yang Guangsan's expedition to Goguryeo hurt the vitality of the country and accumulated too much public resentment; In addition, he vigorously attacked the family and suffered a backlash, which led to the smoke and the death of the second.

It can be said that Goguryeo and the Central Plains Dynasty have deep enmity and blood marks.

Of course, in a sense, if it weren't for Goguryeo, Li Tang might not have had a chance to reach the top; However, Li Kuan naturally didn't care about this, he only knew that the country of Goguryeo would have to be cleaned up sooner or later.

"Xuanwu, don't break this route in the future, the East China Sea fishery can open a shop in Seoul and inquire about the news of Goguryeo, in case of emergency."

There are only three or four days of waterway from Dengju to Seoul, which is closer than going to many places in Datang.

Under the couch, how can you allow others to snore?

Even if there is no Li Kuan, there will be a battle between the Tang Dynasty and Goguryeo.

It is necessary to prepare in advance and know yourself and your opponent.

"Lord Wang, when I return to Dengzhou, I will arrange it immediately. If I spend the night in Seoul today, I can go to the city in the evening to inquire about the news? ”

Wang Xuanwu has always done whatever Li Kuan tells him to do, and he will not ask so many whys.

"No, this time we don't want to make any extraneous complications, first familiarize ourselves with the route, and after following the Japanese people to the shore, we will continue to set off with some additional things."

……

"What do you say? Li Kuan ran away with the Japanese people? ”

In the imperial study, Li Shimin looked at Li Zhong with cannibalistic eyes.

"Your Majesty, many people in Dengzhou have personally witnessed His Royal Highness the King of Chu go to sea with the envoys of the Tang Dynasty. It is said that it was because the ships of the Japanese were accidentally burned that the king of Chu personally sent them back to China. ”

"Stupid! Very foolish! The Wa Kingdom is just a vassal country, where is it worth his adventure? If you have to help, just give the Japanese people a boat, why do you have to put yourself on board? ”

Hearing Li Shimin say this, Li Zhong's next voice became quieter, "Fang Xiang's Erlang, General Wei Chi's Sanlang, and General Cheng's Dalang also went to sea together." ”

"Bang!" Li Shimin couldn't hold back any longer, "Can't he save some snacks, I'm so angry." Something is going to happen, so how can I explain to Xuan Ling and them? ”

"Your Majesty, it's not necessarily His Royal Highness the King of Chu who asked a few Lang Jun to go with him."

Li Zhong hurriedly defended Li Kuan.

"What's the point of saying that? Why don't you hurry up and invite Xuan Ling and a few of them over? If something so big happens, don't you have to tell them in advance? What if you really can't come back? ”

Li Shimin really couldn't understand why Li Kuan, who was usually such a smart person, suddenly became confused.

If you are confused, you are confused, why do you still pull the children of several important ministers into the water together?