In early April of the sixth year of the Tianqi revelation, various territories outside Shanhaiguan were busy cleaning up refugees.

Hundreds of thousands and nearly one million refugees made the lords' army busy. In order to complete the task as soon as possible, the lord's army has completely abandoned sympathy and turned into a machine that only knows how to kill.

Whenever these troops saw refugees, the first thing they did was not to expel them, but to raise their weapons and rush forward. After a scream, the refugees turned into corpses.

The army did not even look at the bloody ground. Under the leadership of the knight, they reorganized the team and headed to the next place again.

Xia Country is busy developing itself. Military reorganization training, political system reform and adaptation, naval fleet heading north to explore the waterways, and soliciting people who are willing to go north to the Linhai Basin to build a new home...

All of this is full of fulfillment in the busyness. As long as you go through a period of adaptation, the development speed of Xia Kingdom will definitely reach a new level.

Li Bao's exploration fleet sailed north at a speed of five knots. On the first day of leaving, he sailed in a familiar sea area, and at other times he was completely in an unfamiliar sea area.

Therefore, the fleet can only sail during the day and rest at night. In addition, the officers and soldiers of the ship are extremely nervous when exploring, so they can only sail for five to six hours a day.

The ocean is not land, and it is sailing near the sea. The concerns about hitting the reefs, the awe of the ocean, and the confusion ahead have made the entire fleet tense up.

During the exploration process, it would be great if the ocean currents could be found.

Ocean currents refer to the relatively stable flow of seawater on the surface of the ocean all year round in a certain direction.

Ocean currents can be divided into warm currents and cold currents. If the water temperature of the ocean current is higher than that of the water temperature reaching the sea area, it is called a warm current; if the water temperature of the ocean current is lower than that of the water temperature reaching the sea area, it is called a cold current. However, when warm and cold currents meet, they often form sea fog, which is not conducive to sea navigation.

Ships sailing along the ocean currents can save time and speed up. In other words, ocean currents are natural "highways" on the ocean, or the type with their own acceleration transmission belts.

According to previous world experience, ocean currents flowing from low latitude to high latitude are generally warm currents, and ocean currents flowing from high latitude to low latitude are cold currents. Except for the north and south poles and the equator, cold currents are generally near the sea, and warm currents are generally in the distant sea (not the distant ocean).

Therefore, during the exploration process, the fleet where Li Bao is located must also find the warm current to the north and the cold current to the south so that the Xia Kingdom's sea ships will save time when sailing on the sea in the future.

Fortunately, with the experience and information of exploring the East Sea, Li Bao quickly found a cold current flowing south from the north, and then passed through a large fog area and found a warm current flowing north.

As long as you sail along the warm current, the fleet's speed will accelerate. This time, Yang Song's mission to Li Bao is to explore the waterway, not to find out the entire sea area.

Therefore, Li Bao directly followed the northward current and sailed northward.

But he also had to investigate the sea conditions on the waterway and could not sail continuously. Therefore, when Li Bao arrived at the sea outside the Linhai Basin, eight or nine days had passed.

In fact, in addition to the impact of ocean currents on navigation, another one that has a great influence on navigation is the monsoon.

The monsoon has a great impact on sailing warships and sea ships. Even the Xia Kingdom ships with spinnakers will always come faster than the wind when they are heading for the wind.

The monsoon in the sea area east of Xia Kingdom is divided into summer monsoon and winter monsoon after years of summary.

The summer monsoon is a southeastern wind, which is conducive to sea ships heading north; the winter monsoon is a northwest wind, which is conducive to sea ships heading south.

It is the time of March and April, and the summer monsoon has not arrived yet, so the monsoon has no effect on the voyage of the exploration fleet.

Li Bao made sufficient preparations to explore the waterway this time. Every time he returned to Tianqi City, he would go to the Dao Library to search for information.

Now he has rich knowledge of navigation theory. After arguments along the way, the channel can be fixed as long as he comes and returns a few times.

On the tenth day, the fleet left the ocean current and sailed westward, along the coastline, and found the entrance to a river.

According to the information, this river is the Guihai River in the Linhai Basin, which is the river where the city of the Big Territory, the small territory northeast of the Bill Territory was located.

This Big Lord was the first to surrender in the war to take back the caravan.

Since the Xia Kingdom occupied the entire basin south of the Linhai Mountains, it has given all the places a new name, and this river has been named "Guihai River".

As soon as Big City faced a river, Di Qing and Lu Su thought that it would be easier to deal with a fleet when siege.

Although Bigg City has been abandoned now, it has become the planned Dongbao Town. In the hands of Xia Kingdom, this place will definitely become more prosperous in the future.

When Li Baohang entered the Guihai River and went upstream, he arrived at this place in less than half a day.

Looking at the ruins, without any people, Li Bao sighed and ordered: "Stop the boat, go down and rest for a night, replenish the freshwater, and continue sailing north early tomorrow morning."

After ten consecutive days of sailing at sea, the whole ship needs to go ashore to rest and relax his tense nerves in preparation for the next sailing at sea.

On the eleventh day, a fleet of three frigates and two transport ships went to explore the north again.

On the thirteenth night, the fleet arrived at the sea off the Mike Territory and at noon on the thirteenth day, it arrived at a small town near the sea.

Similarly, this small town near the sea had been abandoned and destroyed. Li Bao stopped the boat again, made a mark, rested for another day, and issued an order to return on the morning of the sixteenth day.

When returning, Li Bao chose the southward current near the sea. After careful sailing, it took twelve days to lead the fleet back to Naval Town.

When Li Bao arrived at Haijun Town, it was already mid-April of the sixth year of the Apocalypse.

It took a total of twenty-eight days and nearly a month of sailing. This was the first time Li Bao led the fleet to sea for such a long time.

If it weren't for two transport ships providing supplies to the fleet, three frigates alone wouldn't have been at sea for so long.

"Your Majesty, I just need to come and return twice and figure out the sea conditions on the route, and this channel can be used." After Li Bao returned to Tianqi City, he rushed back to Tianqi City as soon as possible and reported to Yang Song about the departure situation.

Yang Song smiled and praised: "It's done very well, Li Bao. As long as you determine the channel, you will never forget your achievements, and you will not be rewarded."

"My Lord Xie, this is what the minister should do, and I dare not take credit." Li Bao bowed and clasped his fists and replied.

Yang Song laughed and said, "If you have merits, you will be rewarded, and if you have mistakes, you will be punished. I still know that I am not aware of it."

"By the way, Li Bao, how long is the entire route of this channel?" Yang Song asked.

Li Bao replied respectfully: "Your Majesty! According to the calculations of the minister, starting from Haijun Town and reaching Dongbao Town, there are about 650 kilometers in total, and to the small town facing the sea further north, there are about 780 kilometers."

"Thank you for your hard work, go back and have a good rest for a few days, and you will be busy next." Yang Song said encouraged.

Li Bao bowed and bowed again and said, "Yes, thank you, I will leave!"

The task Yang Song gave Li Bao was to discover the small town in the sea.

As for crossing the sea further north of the Linhai Mountains, Yang Song and Li Jing thought it was not appropriate to alert the snake, so they did not let Li Bao go to investigate.

Nowadays, the powerful army of Xia State has made the forces outside the pass uneasy. If these forces were allowed to learn that Xia State had such a powerful fleet, it would probably have a counterproductive effect on delaying the enemy's plan.

If the navy really needs to be dispatched in the future, the unexpected fleet will be the best blow to the enemy!
Chapter completed!