Hoarding food is one of the necessary conditions for Song people to sail on sea voyages. In terms of theory and practical application, Song people also did a very good job.

As early as the early Northern Song Dynasty, some people had conducted in-depth research on the ocean. Yansu, who wrote "On Ocean Tides" and drew "Tide Map", created a compass and applied the compass to land transportation.

Later, Shen Kuo mentioned several methods of using magnetic needles to determine orientation in "Mengxi Bi Tan", such as the "wire suspension method" and the "water floating method".

The "water floatation method" is to put a magnetized steel needle through rushes and float it on the water surface.

It is said that the first compass introduced to Europe was Shen Kuo's "water float method".

The Song Dynasty documents that most directly record the use of compasses for navigation are "Pingzhou Ketan" and "Xuanhe Fengshi Gaoli Illustrated Book".

The second volume of "Pingzhou Ketan" contains: "The boat master knows geography, observes the stars at night, observes the sun during the day, and observes the compass in the dark."

In this era, it guided the people of the Song Dynasty to sail the sea and completely opened the Maritime Silk Road.

On the tenth day of the first lunar month of the eleventh year of Jingkang, the Song army first rested at Vijaya Port in Champa.

Vijaya is a seaport in the south of the Champa State. The king of Champa fled Chenla and his whereabouts are unknown. The Champa State existed in name only.

In this case, Vijaya basically became a delinquent boy who had no control over him. Even a group of local people jumped up and jumped out and became a group of pirates.

He threatened to become bigger and stronger and create glory in the southern part of Champa State.

What they mainly do is to intercept passing ships, rob them if they can, and run away after they rob them.

As a result, the sea line from Champa to ancient Siam suffered serious losses.

Merchants from Qinzhou or Guangzhou were all robbed here.

Since last year, Li Bao has been using troops here, sweeping this area with bronze artillery, and all the pirates have been frightened by the news.

They also used strikes and recruitment methods to almost eliminate the threat of pirates in this area.

At present, the Song army stopped at Vijaya for one day and replenished a large amount of vegetables, fruits, as well as a lot of fruit wine and fresh water.

Li Kun ran to check and said, "Add more Huang Guo."

"Don't worry, the General Staff Army, all the yellow fruits have been replenished, which is enough for the entire army to eat for the first half of the year." Pu Luoxin said.

"Okay, get ready to go."

Pu Luoxin suddenly said: "General Staff Officer, I heard that this yellow fruit has another name. What is it called lemon?"

"There is indeed such a name. I heard from Xianggong Qian that it was given by the Zhao Guan family. It is also the Zhao Guan family's intention to configure this thing on a sea ship. Since the introduction of lemons, the probability of sea ship crew members getting sick has been greatly reduced."

"How did your Majesty know that this thing is good for sailors?" Prosin asked doubtfully.

"How can we guess His Majesty's heart? You have just come to our Song Dynasty to serve as an official. Don't think too much about it."

After replenishing, the Song army set off again.

Lemon is an essential artifact for ancient ocean voyages.

In the Age of Discovery, a large number of Europeans often died of scurvy during long ocean voyages, so that voyages became a nightmare.

Later, it was lemons that saved Europeans at sea.

Because of vitamins.

At this time, Srivijaya did not know that the navy of the Song Dynasty had already arrived.

On the twenty-eighth day of the first lunar month, the wind and sunshine were beautiful, and as usual, many merchant ships gathered in Boni Port.

Among them, you can see the boat of Sriwijaya, with a flag on the boat, and the flag is written in Malay.

Srivijaya is the most powerful country in the South China Sea. Its control range once stretched from ancient Siam to Java, and also to Baloni, covering almost one-third of the territories of the countries in the South China Sea.

Malay is the official language among the countries.

Many people from Guangzhou and Fujian who go south are more or less knowledgeable.

On the coast of Bo Ni Port, there are many carriages and horses loaded with a dazzling array of goods.

There are countless kinds of medicinal materials and many spices.

Li Kun looked at the clock on the table, patted it, and said, "Why did it stop?"

"General Staff, this thing seems to be broken."

"It's broken? Do you have any spare ones?"

"It seems there is." Commander Wang Su ran below the deck to search for a long time and came back with a new clock.

Li Kun sighed: "Having this clock is really convenient. You know the current time and can make arrangements according to the time."

Wang Su pointed to the front and reminded: "General Staff, the Song boat in front has stopped."

"I saw it, come over."

It was a Fu ship. As the name suggests, it was a ship built by Fu and was the best ship of this era.

Some of the warships of the Song Army were built in Hangzhou, and a considerable part were built in Fu. The structure is very similar to the Fu ships.

The design inside is even more exquisite. There are many rooms below the deck, each room has six beds.

It's still bunk beds.

This was not planned by Zhao Ning, it was planned in the official history.

Of course, officers or caravan stewards have their own private rooms.

The two Song warships quickly approached the lucky ship. Seeing the nine-shaped dragon flag flying on the Song warship, this merchant ship was definitely a warship of the Song Dynasty.

Not long after, a young man got on the boat.

"Liu Xiang, a common man, please see Shangguan."

From the accent, he knew he was from Guangzhou, so Li Kun immediately found a soldier from Guangzhou to translate for him, so he could communicate even if he couldn't write.

"Are you here to do business?" Li Kun asked.

"Yes, we transported some silk, cloth, some tea and ceramics on the ship." Liu Xiang answered honestly and carefully.

"How long have you been doing business in Bo Ni Country?"

"I have been doing this for a long, long time. Our ancestors have been trading in the South China Sea for generations, at least for five generations." Liu Xiang had a smile on his face, but he was confused in his heart.

Why did we encounter the warships of the Song Dynasty in the Bo Ni Kingdom?

This has never happened before.

"I am Li Kun, the general staff of the Nanhai Economic and Strategy Department of the Song Dynasty. We are going south under the orders of the imperial court."

After hearing Li Kun's self-reported identity and seeing the strict discipline of the people around him, Liu Xiang's heart suddenly dropped.

Humans come from nature and are one of the animals in nature, but humans are social.

Human beings have established civilization and created laws and ideologies to maintain the operation of human society and ensure the safety of most people.

But these things no longer exist when human beings leave the clustered towns and go to the uninhabited wilderness and the uninhabited sea.

In a sea where there is no order, anyone you meet may be the murderer who wants to kill you.

When the first Europeans embarked on the great voyage, they were no longer people living in a civilized world, but had become the most primitive animals.

In the animal world, the jungle is full of jungles.

Seeing that Liu Xiang was still sweating on his forehead, Li Kun smiled and said: "Don't worry, we have the king's orders and we are not here to rob you."

"Common people dare not dream."
Chapter completed!