A moment later, Wei Wei returned, holding a copy of sun tzu's art of war and with her mind buzzing with tactical maneuvers.
Of course, since it was a trade, it wouldn't be just for one book.
Su Yi also gave her the two hundred exoskeleton armors that Bai Lu had sent as samples.
The things Wei Wei needed to provide, besides the extra one thousand tons of magical crops they had agreed upon earlier, also included a martial arts cultivation method from the Chiyang Empire's imperial family that was never taught to outsiders.
The magical crops were exchanged for the exoskeleton armors.
But how could a book like sun tzu's art of war be measured by mere items? He definitely had to make her exchange it for technology of equal value!
This technology, of course, was the knowledge and inheritance for cultivating magic or magic martial arts.
Actually, Yue Ling and Xing Hen also possessed these things.
However, they cultivated the Elf race's magic and martial arts, which humans could also cultivate, but it was very difficult and slow for them.
As a hybrid, Xing Hen did have some magic and martial arts inheritances suitable for human cultivation.
But the levels were relatively low, and Su Yi wasn't particularly impressed.
So, even though he sometimes thought about trying to cultivate when he had free time, he had always struggled without a suitable cultivation method.
Wei Wei was the type of woman who wouldn't act without profit; if there wasn't a corresponding item for exchange, trying to get her true hidden treasures was out of the question.
This time, he inexplicably discovered that the war situation in their world was still so ancient, and simply finding a copy of sun tzu's art of war on a bookshelf could be exchanged for the Chiyang Empire's hidden cultivation methods, passed down for tens of thousands of years in the Magic World—it was an absolute bargain.
Of course, he might have profited, but Wei Wei certainly didn't lose out.
sun tzu's art of war would undoubtedly be a dimensionality reduction strike on the battlefields of their world.
Su Yi could even imagine her counterattacking from a city that had been besieged for three years after she thoroughly understood the book.
The backwardness of warfare in the Magic World was not without reason.
These people relied too much on individual combat power, believing that powerful martial artists or mages could completely determine the outcome of a war, and they completely disregarded armies composed of ordinary people and low-level martial artists.
It was normal for strategy and tactics to not develop.
But in reality, can these high-end combat powers truly completely determine the outcome of a war?
Not necessarily.
If the high-end combat powers in the Magic World were truly strong enough to ignore all low-end combat powers, to the point where no matter how many people came, they would be useless as long as they started killing, then the organization of an army would have no reason to exist at all.
They also wouldn't have developed armies.
Su Yi specifically asked Wei Wei many questions about the war situation in their world.
The conclusion he reached was similar to his guess.
Both mages and martial artists in the Magic World are usually divided into nine ranks.
Among them, every three stages are a watershed.
Mages from one to three ranks are generally only called magic apprentices, and martial artists are also called martial artists, with prefixes indicating their level.
From four to six ranks, the titles change; mages at this stage can be considered proper mages, while martial artists are called knights.
From seven to nine ranks, they are already high-end combat powers in the Magic World, and each stage has a different title.
A seventh-rank mage is called a Great Mage, an eighth-rank is called a Magister, and a ninth-rank is a Grand Magister.
The corresponding martial artists are Starlight Knight, Eclipse Moon Knight, and Blazing Sun Knight.
Wei Wei is a dual cultivator of magic and martial arts, both at the seventh rank.
Yue Ling is dual eighth-rank.
When Su Yi asked Wei Wei how Yue Ling's strength compared to hers, that woman actually said she was only a little stronger than her, which shows her shamelessness.
She didn't even blush saying such nonsense.
With her meager abilities, she wouldn't even be able to withstand one hand from Yue Ling.
Beyond that, above the ninth rank, both mages and martial artists are collectively referred to as Legendary powerhouses.
Like Xing Hen.
They are also called Demigods.
Above Demigods are God of Magic and God of Martial Arts, the true gods of their world.
According to Wei Wei, apart from the gods, there is no one in their world who can truly go on a rampage and mow down enemies.
If there is no army support, even the so-called Demigods, if surrounded by a million-strong army and the enemy's army is equipped with magic weapons, will face certain death.
Some magic weapons in this world are far more powerful than the guns on Blue Star.
For example, the siege crossbow and magic armor-piercing arrows that wounded Wei Wei are standard equipment in their world's elite legions.
Even a dual seventh-rank powerhouse like Wei Wei, if hit head-on by an arrow, while not fatal, it would still be a serious injury.
It was only because of life water that she could act as if nothing had happened.
As for weapons on Blue Star, to wound Wei Wei this badly while she's wearing magic armor...
Su Yi estimated that even a direct hit from a 155mm howitzer wouldn't work; it would require a missile.
And even a missile, while powerful, couldn't possibly hit Wei Wei in a real battle, so the effect would definitely not be as good as these magic armor-piercing arrows.
Clearly, the Magic World's development over so many years was not in vain.
Their armies are skilled at using weapons enhanced by these magical means to deal with those powerhouses.
Therefore, the existence of armies in their world's warfare has meaning.
The notion that high-end combat power can completely determine the outcome of a battlefield, and that tactics are useless, is simply nonsense.
In Wei Wei's current situation, as long as she can thoroughly grasp sun tzu's art of war, she will definitely shine brightly on the battlefields of their world in the future.
And if one sun tzu's art of war isn't enough, he still has a bunch of other military treatises here.
The so-called tactics he discussed with Wei Wei earlier are things even three-year-olds in Kyushu know; there are far more powerful ones.
...
Returning to Blue Star with a full harvest, the first thing Su Yi did was call Old Lin.
"Isn't this Su Dong? What do you need from an old man like me?"
Judging from his tone, Old Lin was probably in a very good mood at the moment.
Su Yi didn't waste words and directly stated his purpose:
"I need thirty billion."
"???"
On the other end, Old Lin, who was chatting and drinking tea with an old friend, directly spat a mouthful of tea all over the other old man.
He didn't even bother to apologize and immediately shrieked:
"No, are you treating me like a money printer? Thirty billion just like that?"
"I have a battery technology that is absolutely epoch-making and revolutionary.
I'll exchange 10% of the shares in this technology for thirty billion.
I need the transfer immediately; it's urgent." Su Yi ignored him and directly stated his purpose.
"...What kind of battery?" Old Lin asked cautiously after a moment of silence.
"Metal hydrogen... Forget it, you wouldn't understand even if I told you.
In short, the volumetric energy density of this thing is nine hundred times that of gasoline; you figure it out."
"How much?!"