Of course, Yang Yi would not do such a thing as lifting a stone to shoot himself in the foot, he knew better than anyone what the master of the future war would be, it was gunpowder.

Today's gunpowder research and development is still at the most rudimentary stage, and the power has not been shown at all, so whether it is Murong Sinan, Zheng He and other Shu army generals, or Li Cen and Yu Xiang, the princes have not paid enough attention to the importance of those black powder particles.

Most people think that the most powerful bed crossbow that can project a catapult farther is the key, but Yang Yi clearly understands that no matter how strong the trebuchet and crossbow are, it is always limited to the era of cold weapons.

Compared with gunpowder, these war kings in the cold weapon period can be described as pediatrics, even the most primitive earthen guns and earthen cannons can be completely crushed.

Therefore, Yang Yi is very generous in the sale of cold weapons, and anyone who is generous looks like a fool doing it.

In the eyes of others, Yang Yi is like an upstart landlord who sells all his housekeeping skills to others for money, which is undoubtedly self-defeating, but only a few people know that Yang Yi's real housekeeping skills are hidden very deep and deep, and no one can touch them.

In terms of military industry, it can be said that 80% of the energy of the Wuzhishan Military Factory is now devoted to the research and development and manufacture of gunpowder and firearms, and the results of research are very optimistic. Before Yang Yi left Shuzhong for the Northland, Zhou Gongyi reported that they had not only found the perfect ratio of black powder, but also discovered the basic principles of rifling technology.

This is very good news, rifling is the core of the gun, as long as the rifling is perfected, then the advent of the big gun and the cannon will be infinitely close.

Selling low-level cold weapons to develop higher-level hot weapons, Yang Yi felt that this was the real way to raise the war by war, which would not only allow Shu to obtain huge financial benefits, but also that the level of science and technology in Shu would always be higher than that of others, and gain the first opportunity in the war and take the advantage.

"It's like two people racing around a circular field, and at first glance it looks like we're on par with everyone else, but we've actually run one lap more than everyone else, you know?" Yang Yi said with a smile.

Everyone still looked at Yang Yi with wide eyes and doubts.

Yang Yi waved his hand helplessly and said, "Okay, you will know in the future, I have to go down and sleep for a while, after tossing for so long, I can finally sleep peacefully." ”

These things are very complicated, it is difficult to explain clearly for a while, Yang Yi simply won't say it, and when the firearm comes out, Murong Sinan and they will naturally understand Yang Yi's intentions.

Yang Yi handed over the ship to Murong Sinan and Zheng He, and he got under the cabin and began to fall asleep, and told Monkey Jian'er that he would sleep until he woke up naturally, and he should not call him if he had nothing to do.

The return journey was very smooth, there were no pirates and robbers, and there was no storm, and half a month later, the huge "Red Sun" slowly sailed into the bay of Da Viet Kingdom.

When the "Red Sun" entered the Shu Military Port, everyone was surprised to find that there was a huge ship moored in the military port, which was similar in size and shape to the "Red Sun", but the color of the hull was slightly different.

The "Red Sun" is red and black, while the giant ship is mainly sky blue.

The chief officer who came to greet him at the military port told Yang Yi that this huge ship was called "Zhenguang" and that it was the sister ship of the "Red Sun" battleship, and that after the "Red Sun" successfully tested the waters, the "Zhenguang" had already begun to take shape, and it took only five months to take shape.

Yang Yi pointed to the two giant ships that were driving side by side and said: "Experience is a very important thing, especially in research and development, as long as there is a lesson from the past, the future will be much smoother." It took you nearly two years to build the Red Sun and five months to build the Zhenguang, and I hope that your construction period will be increased to two to three months. ”

The chief officer of the military port is called Chai Zi, an old worker in Wuzhishan, who was sent by Zhou Gongyi to Dayue to be responsible for the management of the military port and the supervision of shipbuilding.

Hearing what Yang Yi said, Chai said: "Your Highness, rest assured, Lord Zhou has been to Dayue last month, and after surveying the shipyard, he has instructed us to convert the shipyard into assembly line production, once the whole system is perfected, don't say that we can build a warship in three months, even within a month, we are confident to complete the construction of a giant ship." ”

Yang Yi nodded with satisfaction and said, "Efficiency is a good thing, but don't rush for quick success." Lao Chai, you are an old man in Wuzhi Mountain, you should know how much damage the accident in Wuzhi Mountain caused us, and I don't want this to happen in the shipyard. ”

"The subordinates dare not slack off, and they will definitely ensure that the shipyard is thorough!" Chai Zi bowed down and bowed.

Yang Yi helped Chai Son-in-law up and said, "You have to remember that in our Shu, nothing is as valuable as human life, things can be rebuilt if they are gone, and human lives are really gone." ”

Chai nodded gratefully and said: "Your Highness, it happens that tomorrow is the water entry ceremony of the Zhenguang, basically the newspapers of Shuzhong and Dayue will come, if His Royal Highness can cut the ribbon for the Zhenguang and give a speech, it will also greatly invigorate the national prestige." ”

Ribbon-cutting is a very post-modern thing, originally Daguang did not have this rule, since Yang Yixing set up a newspaper, this kind of very rendering ceremony was reproduced by Yang Yi, generally there are large-scale activities or large-scale factories will be implemented when the opening of the factory, and the newspaper will be invited to come to the film for publicity.

Yang Yi smiled: "Of course you can." After a pause, he added, "It just so happens that I also have a decision to announce tomorrow." ”

Chai Son-in-law was overjoyed: "Then the next official will go down and arrange it immediately!" ”

Yang Yi of the Dayue Shipyard has set up a new military industry, which has only been settled for more than a year, and can only be regarded as a fledgling in the many military factories under Yang Yi's command, if Yang Yi can personally help the shipyard cut the ribbon and congratulate him, the status of the entire Dayue Shipyard will be greatly improved.

Leaving with Chai Son-in-law are Zheng He and Murong Sinan, since Yang Yi is going to appear in public, then security will be at the forefront of the issue, here is not Shuzhong but Da Yue, although Yang Yi has been slightly Da Yue for almost three years, but there are still these reactionary forces in Da Yue Guo, Murong Sinan is going to the Shu army camp to find the main general Yue Jing to discuss defense matters.

And Zheng He went to the Dayue military camp stationed not far from the Shu army camp.

Although the Great Yue Kingdom is completely under the control of Shuzhong, after all, the Great Yue Kingdom is still nominally independent, and an independent country should naturally have its own army. Of course, the number of troops in the Great Viet was not large, and the weapons and equipment were strictly controlled.

As for what Zheng He went to the Dayue military camp for, no one knows.