The specifications and structure of the Kyoto University Hall have become more and more perfect.

Under the leadership of Sun Chengzong, the ordnance department of the Ministry of Industry of the Ming Dynasty has been relocated to the Jingshi University Hall.

The entire school is currently coordinating the design and production of artillery in the Ming Dynasty.

Zhou Xian walked quickly to the hall of the school, and after the ministers followed Zhou Xian in, they consciously sat on both sides.

On the table in front of Zhou Xian were documents on ships, hydrology, and firearms manufacturing.

Xu Rongbing said: "Chitose Lord, at present, there are 6,984 craftsmen in the Ship Bureau, and during the period when there was no ban on Haiphong in our dynasty, the annual output of the Ship Bureau can reach 700 ships, 70 large sea vessels, 460 medium types of offshore ships, and the rest are small river boats and river boats. ”

Zhou Xian nodded.

What Xu Rongbing said was before.

Now if Daming has this volume, it will be directly called the world's first.

The ship bureau of the Ming Dynasty was indeed the Ming Dynasty when Ming Chengzu Zhu Di began to appear, and then reached its peak in the Yongle period.

Zheng He went to the West six times that year, and developed the naval strength of the Ming Dynasty to its peak.

So much so that during the period of the sea ban, when the entire Ming Dynasty dominated the open sea, the total number of ships reached an astonishing 30,000.

It's just that at that time, there were also a huge number, but when they really followed Zheng He out to sea, there were only about a hundred or so giant ships that cut through the waves.

Therefore, the Ming Dynasty still has a long way to go if it wants to reach the peak of the Yongle period at this stage.

But it was necessary to catch up with the size of 300 ships.

Otherwise, it will not be possible to form a clamp on Jiannu at all.

If this matter is not done well, Zhou Xian will be annoyed by the two big colanders of Tianjin Wei and Bohaiwei.

Zhou Xian said: "There is no need to make boats cruising on the Yangtze River and the Yellow River for the time being, and I will only discuss with you today the manufacture of large sea vessels. ”

After all, the documents accumulated by the Ming Dynasty are still there.

Therefore, the manufacturing technology is still available, and it only needs to be familiar with the university scholars before it can be put into production.

Now that Lu Kefu is in Bohaiwei, he not only wants to form an alliance with North Korea, but also needs to show his naval strength.

Therefore, Zhou Xian had to first allocate sea ships for him to form a large fleet near the sea.

Diplomacy is like internal affairs, if North Korea wants to form an alliance with the Ming Dynasty, they must first see the strength of the Ming Navy. Xu Rongbing had already understood what Zhou Xian meant, and immediately said: "At this stage, if the University Hall is fully processed, it can make thirty large sea ships. ”

"How big is it?" Zhou Xian asked.

"Nineteen zhang long and three zhang wide."

Listening to Xu Rongbing's words, Zhou Xian was secretly surprised.

A sea vessel with a length of sixty meters and a width of nine meters.

This is already a template for a modernized destroyer.

I have to say that the ocean-going technology of the Ming Dynasty is indeed very powerful.

Xu Rongbing continued: "Xiaguan has communicated with the ship technicians in the University Hall, and has now set the specifications for my ship, which is divided into five levels. ”

"The first gear is a giant ship, 60 meters long, with a draft of 7 meters, and the advantage is that it relies on tonnage to collide."

"The whole ship is made of pig iron keel, cleaving the waves at sea, and there is no fear of warships with other countries."

"The second gear specification is a large ship, 40 meters long, with a draft of 4.5 meters, with the artillery developed by our dynasty, equipped with 60 sailors." "The third gear is a warning boat, with a length of 20 meters and a draft of 2 meters, which is used for warning and rapid detours."

"The fourth gear is a grain ship, with a length of seven to fifteen meters, and the cabin is made of wood, and the hull is light and can be used for transportation."

"Because the grain ship is relatively small, more sails will be erected when designing, so that the sailors on each ship can be reduced, and it can be used to carry more food and other military supplies."

"The last gear is the deck boat, which is a large bamboo raft."

"Used to line up troops, deck ships can be used with all types of ships, and can be used to engage in close combat with local ships in the near sea."

"There are fifty sailors on the deck ship, and everyone is equipped with firearms, open knives, and armor-piercing crossbows."

Listening to Xu Rongbing's explanation, Zhou Xian's face was hot.

Xu Rongbing introduced it in great depth.

Zhou Xian asked: "Then what grade of warship am I facing Jiaozhou Bay now?" ”

"Back to Chitose Lord, Jiaozhou Bay is now using a dilapidated fourth-tier ship."

Zhou Xian shook his head depressedly, and said lightly: "The fourth gear, that is, the smallest warship among the main battle ships, is really difficult for Lu Ke to sickle, and match Jiaozhou Bay with a first-grade giant warship." ”

"Chitose Lord, this ......"

Xu Rongbing suddenly made a difficulty.

All the grades he just introduced are just on the drawings, and it is not as simple as doing it by hand to build.

You must know that since the Ming Dynasty banned the sea, all first, second and third grade warships were forbidden to be built.

This is the Jun order issued by the Yongle Emperor.

During the reign of Emperor Chongzhen, the fourth-grade river boats were built for Cao Yun.

Now that giant warships are to be built, does that mean that the sea ban will be lifted?

Sun Chengzong got up and asked, "Chitose, if you build a giant warship, then the imperial court will have to issue a decree." ”

"I know."

Zhou Xian looked at Sun Chengzong and said: "Any decree is issued according to the actual situation, now we need giant warships, first of all, Jiaozhou Bay can directly deter Dalian of Jiannu, and naturally it can pass through Dongjiang Town like Mao Wenlong back then." ”

"The main thing is that I have to vigorously develop the navy."

As soon as Zhou Xian's words came out, the ministers in the university hall were suddenly surprised.

Now everyone knows the foreign strategy of the imperial superintendent of the country.

To put it bluntly, it is to join forces with the Mongolian tribes who are already in the west to fight against Huang Taiji and prevent Jiannu from advancing westward.

Then the next step is to control Liaoyang and steadily recover Liaodong.

Subsequently, they trained troops in Jiaozhou Bay to reconstruct the glory of Dongjiang Town in the past.

Such tactics can be described as unsophisticated.

Once successful, it can indeed encircle Jiannu at sea, so that Jiannu can only shrink and defend at the expense of one or the other.

And not westward.

However, when did the imperial court start to go through the process in Dongjiang Town?

How did we not know?

Now the Manchu civil and military forces did not know that Zhou Xian had sent an envoy to Korea.

Zhou Xian continued: "Our Ming Dynasty's external enemy is not only Jiannu, but the real trouble in my heart is the Japanese Kou, and the recent incident of capital enemies in Bohaiwei and Tianjin Wei fully shows the weakness of our coastal defense. ”

"Now that the Japanese are harassing the DPRK and have occupied a lot of North Korea's territory, if they use the DPRK as a springboard to attack our coastal defense, the scourge of the Japanese will be repeated again."

"So I planned in advance to revitalize Dongjiang Town in Jiaozhou Bay."

"Lu Kefu has been sent to Jiaozhou Bay by me, and Jiaozhou Bay will be the garrison of my Ming Dynasty's offshore fleet in the future."

"With the Jiaozhou Bay Fleet, then our dynasty can take back Dalian that belongs to us through naval warfare."