Yang Zhongfu knows that there are three kinds of calendars in the world.

A calendar based on the changing seasons of the sun, a calendar based on the moon surrounding the earth, and a lunisolar calendar that takes into account both. At present, the Great Song Dynasty uses a lunisolar calendar.

Either way, it can't be separated from astrology.

The study of the calendar represents the study of the celestial phenomena and the stars.

Yang Zhongfu bowed: "I am willing to go south to study." ”

"Yes." Han Yanxuan nodded.

The sextant, this thing is the first weapon of navigation, and a huge amount of money has been invested, and the cost of grinding the crystal alone can scare people to death.

According to Han Jiang's plan, within a year, a small success, three years, can let the sailors sail.

Yang Zhongfu was given a chance, but at the same time he lost his freedom.

He can go home, but even if he goes to the toilet, he will be accompanied by at least two people.

However, Yang Zhongfu didn't care.

Previously, the Han government studied the method of smallpox and the method of increasing the yield of rice fields. Yang Zhongfu inquired, and these two secret techniques had not really been completed, but they had to be announced.

And the price of publication is that it cannot be studied in depth.

Take the method of curing smallpox as an example, Lin'an City knows that it is a poison medicine taken from a sick cow, but what poison is it and how to make medicine.

No more information.

Even if he didn't mention these things, the apprentices of the craftsman sect would keep a hand, and he could understand that Han Fu kept the research of astronomy secret.

Arrange a small official to go south, this matter is not too easy for the current Han Yanxuan.

Two days later, on the day Yang Zhongfu went south, the Han Mansion hosted a banquet for the Jin envoys by the West Lake, and at the same time displayed the Han Mansion's flying artifact.

First.

Hang glider.

There is a loyal and brave family of the Han family in charge of the display.

This one has a real finished product, although it is still far from it, but what comes out is a semi-scrap.

The Han family's family was pulled up and flew up, and after a few turns on the West Lake, he fell headlong into the West Lake.

Wan Yanxiang said to Han Yanxuan: "This is very interesting, give me ten bounty ingots." ”

"Everything is according to Xiangguo's orders."

After Yan Xiang finished speaking to Han Yanxuan, he turned to Jin Guoguan beside him and said, "It's called flying here, that is, tying people to a big kite and ordering people to go down and let people not talk nonsense." ”

"Yes, Sangkook."

The second is still a defective product. This time it's a giant hot air balloon.

Stronger than the previous one.

Pulled by the long rope, it floated on the West Lake for half an hour, and then the hot air balloon burned into a large fireball, and the family in asbestos clothes fell into the water, and then was rescued by the boat that had been waiting in the lake for a long time.

Even if it is a defective product, Wan Yanxiang is also interested.

"If this thing can fly for a day, I'm afraid it will be more useful than the watchtower, if one day the research of the young monarch of your mansion has progressed, my Jin Kingdom is willing to pay a lot of money to buy it."

"When the time comes, I will definitely give Xiangguo a few."

Compared with Jin Guo's reaction, the officials of the Great Song Dynasty thought that this was an oversized Kong Ming lantern, which was worth studying, just something for children's fun.

Han Yanxuan won't tell these stupid people how strong this thing is.

In the absolutely confidential information of the Han family, Han Yanxuan saw that after this thing was completed, it was up to 100 zhang long, and could carry thousands of stones and 2,000 miles a day. After reading this information, Han Yanxuan decided that he would create it at any cost.

With such a thing, even if there is a case, the Han family can evacuate Lin'an overnight.

Or, in Lin'an, you have the capital to fight for a fish and break the net.

Wan Yanxiang was also thinking that he should arrange for someone to study this thing as well.

This is a sharp weapon for aerial reconnaissance of enemy troops.

It is definitely an ordnance that will be of great help to the Jin Army.

Wan Yanxiang's attention to the hot air balloon this time caused Han Yanxuan to feel uneasy.

As a Song minister, the two most important things for an official, the first thing is to study the preferences of the Great Song Emperor, and the second is to study the sworn enemy of the Great Song Dynasty, Jin Guo.

Those in the court couldn't see through it.

Han Yanxuan was very clear.

Don't underestimate Jin Ren, Jin may not be good at ritual music, poetry and books, singing and dancing, and he is not good at fun things.

The food is also poor, and they don't know how to grow food.

But the Jin country is strong.

The Jin army had three battles and was strong. When the children of aristocratic families were ten years old, they were not proud of their ability to bow horses.

The Jin State is strong in armament.

According to the people who fled to the Song State after the fall of the Liao State, the Jin people stole countless techniques from the Liao State, and they were no longer obsessed with ordnance building, but crazy.

They equip the army at any cost, and they don't care if countless people starve to death.

The technology obtained from the previous Liao State, plus the technology obtained from various places in the later Jin State, they had a good skill in tongs and pot steel, and learned how to make Persian steel.

It can be said that in terms of steel, the Jin Kingdom crushed the Great Song Dynasty.

However, it is only stronger than Da Song.

Compared with the steel technology that Han Jiang has now, Yidongcheng Iron and Steel Workshop can already directly produce ordinary steel, but now it is regrettable that it is limited by the small place in Yidongcheng, and the raw materials are insufficient.

Han Yanxuan understood that it would be at least two years before Jiaozhi City was able to make a large amount of steel.

Wancheng is impossible, and the geographical environment determines that Wancheng cannot have a large-scale steel mill.

Lintao can be built, but it is only on a small scale.

While chatting with Xiao and Wan Yanxiang, Han Yanxuan was thinking about how to find a little trouble for Jin Guo, and starting a war with Jin Guo was already a great goal in Han Yanxu's life.

Han Yanxuan was just thinking about it at the moment, but Han Jiang had already turned this idea into action.

Cochin.

A dignitary with a lot of flowers came to Cochin City.

The reason for kidnapping him was to spy on the military secrets of the Great Song Dynasty.

Jeruliugo.

For his younger brother's sake, Mingzhou Sailor did not embarrass him.

It should be said that there is no excessive embarrassment for him.

Tied up and sent to Cochin.

When Yeluliuge met Han Jiang, Han Jiang was working on the new table.

According to Han Jiang's request, a newly created round table.

There are a total of nine chairs.

The material used is agarwood.

There was no paint on the table at all, just a layer of wax.

After knowing that it was Brother Yelu who was kidnapped, Han Jiang greeted him: "Guest, do you want some refreshment or some meat." ”

"Ask for wine."

"Ready. Please. ”

After the loosening of the tie, Yeluliuge moved one shoulder, but he didn't complain about anything.

Today, unlike in the past, the Tayelu family is already a small person in the country.

He struggled to survive in the cracks.

In the future, he relied on Temujin's support for a short period of glory, but now he has nothing.

If there is.

He also had some Liao people to follow, but he was stared at by the Jin people like a thief.

Small hall, with wine and meat.

"The meat is good and it tastes superb."

Han Jiang replied: "Because we used grass fruit, bay leaves, and nutmeg. ”

Yeluliuge spoke very directly: "I heard my brother talk about you, and I want to follow you." ”

Han Jiang shook his head: "I can trust you, and I also believe in your third brother, but I can't trust your second brother Yelu Gobu, I believe that once he has the opportunity, he will be desperate to restore the glory of your Great Khitan." ”