In this era, gold is not gold in the true sense of the word, but copper. The currency of Great Qin and the currencies of the Central Plains are all copper.

Therefore, bronze swords require a large number of copper veins, and the cost is too high, but once iron tools are popularized, the price will be much lower.

Not only the development of iron will be better, after all, the bronze technology of Daqin in this era has reached its peak, which is equivalent to a black technology.

However, future development will inevitably consume a large number of iron ore veins, and bronze is expensive, and copper is a demand for money.

No matter from which point of view, the popularization of iron tools is good for Daqin, and there is no harm.

What's more, Yinggao has seen that era of flowers, and naturally knows that iron ore veins are definitely more convenient than bronze in the future development.

There is no doubt about it!

After all, this has been verified by time and tested in later generations, and everything is clear in Yinggao's memory.

Either way, the Great Qin Empire needed to let the Iron Age fall.

Therefore, Yinggao has always been subconsciously, and even deliberately promoted the development of Daqin's iron-smelting technology.

He wants to promote the transition of Great Qin from the Bronze Age to the Iron Age, which will be a great boost to Great Qin's national strength.

What's more, there are some things, iron is more suitable for casting.

There are even some cross-era things, which make Daqin take off completely.

What's more, the horseshoe, stirrups, and saddles require a lot of iron. Therefore, whether it is for the Great Qin court or the people of Great Qin, bidding farewell to the Bronze Age and entering the Iron Age is a major choice.

Moreover, he now established the Great Qin Central University, the School of Moxue, the School of Arithmetic, and the School of Taoism, plus the Great Qin Shang Workshop, Shaofu, and the laboratories in his mansion.

Maybe the first industrial revolution could be started!

Once this era is reached, Daqin will have the ability to crisscross the entire earth, which is the opportunity for Daqin's Black Dragon Banner and Xuanniao Banner to be planted all over the world.

Therefore, Yinggao has always had great enthusiasm for this matter, and he believes that Daqin has such potential in this era.

Historically, the reason why Great Qin didn't have that kind of opportunity was only because there was a lack of a leader in that era.

A forerunner is missing!

And in this era, he is high, and the prince of Great Qin is that prophet.

The person who led the entire Central Plains to achieve leapfrog development.

Looking at the land of the Central Plains, this position, this person, who else can he be.

"How much cheaper will iron be than bronze?"

Great Qin has an army of nearly one million, and although Ying Zheng is not directly in charge of the Su Nei Historical Office, he still knows how much Great Qin Ruishi will consume in a year.

Hearing Yinggao say this, he couldn't help but look towards Yinggao and said.

Hearing this, Ying Gao thought for a long time in his heart, and said to Ying Zheng: "Father, the reserves of copper veins are too small, but there are many iron veins, and the reserves are huge. ”

"As long as our iron-smelting technology is mature, the swords and weapons we produce are far above bronze, at least ten times more."

After taking a sip of tea, Ying Zheng suppressed his shock, and pondered in his heart for a long time before he walked towards Ying Gao and said.

"In that case, this matter must be followed up, and your lab will give a report on this matter."

"The same promotion of iron-smelting technology, speed up."

"No."

Nodding in agreement, Yinggao groaned for a moment, and then turned to Yingzheng and said, "Father, the development of iron-smelting technology requires an extremely high temperature. ”

"Charcoal alone is not enough at all."

"The most suitable fuel for iron smelting is coal, but in the area controlled by my Great Qin, there are coal veins, but they are all small veins."

At this moment, Ying Gao paused, took a sip of the tea on the long case, and said to Ying Zheng.

"The Jingye Division under Erchen has received news that there is a huge coal vein near Pingcheng, where Yanmen is located."

"And it belongs to the open air, easy to mine, Erchen thinks, should lead the army to conquer Yanmen first, occupy Pingcheng."

"In this way, my Great Qin will have enough fuel, and when the problem of iron ore veins is solved, I can start the transition from the Bronze Age to the Iron Age."

"Pingcheng in Yanmen, this is the land of Zhao State, and now Li Mu is still there, even if you have defeated Li Mu, if you want to get the land of Yanmen, I am afraid that it will be even more difficult."

As the monarch of Great Qin, Ying Zheng knows the geographical location of various countries well, not to mention the proximity to Great Qin.

After Ying Gao spoke, he immediately sensed the position, and said towards Ying Gao: "Unless this time, there is a big battle with Zhao State, it is impossible to get Yanmen." ”

"Hmm."

Nodding, Ying Gao looked at the map in the study, pondered for a moment, and said, "It is true that a battle is needed, but there is no need to provoke Zhao Guo at the moment." ”

"This time, Erchen will go south, and it will take a month just for the army to recruit and move, so Erchen plans to let the rest of the generals who go south recruit 100,000 soldiers, and go to the land of Bashu to station first and find out the local situation."

"At the same time, Erchen personally entered Xihai County, led the Python Army, the Wansheng Army, and mobilized 100,000 Great Qin Rui soldiers, a total of 340,000 troops, and wiped out the remnants of Rong Di in one fell swoop."

"Then fight a war to destroy the country and annex the entire Otsuki Clan!"

Ying Zheng's gaze swept over Ying Gao's fingers, and he looked at Ying Gao with some puzzlement, and said: "These places are relatively desolate, far less fertile than the Central Plains, why do you have to annex this place first?" ”

His finger fell on the position of Gansu in the later generations, Yinggao said in a quiet tone: "Father, according to the news obtained by the sons, the area occupied by the Dayue clan and the remnants of Rong Di can not only raise tens of millions of people, but also have iron ore veins, coal ore veins, and huge reserves. ”

"What Erchen means is that Daqin understands the army of three or four hundred thousand, pacifies this place in one fell swoop, and makes this place the rear of Daqin."

"At that time, whether it is an iron ore vein, a coal ore vein, or a salt ore vein, it will all fall into the hands of my Great Qin."

"By that time, my Great Qin's national strength will increase greatly, and the war potential will increase, if Erchen can finally open up the extreme south."

"Within five years, Great Qin will undergo earth-shaking changes, and when the time comes, with the three treasures of the cavalry, my Great Qin will be able to sweep away the Xiongnu Donghu and other northern alien races."

"Then pacify the land of Baiyue, fight all the way to the south and the north, and establish a Great Qin on which the sun never sets!"

For the empire on which the sun never sets, as long as it is a traverser, as long as it is an opportunity, as long as it is a man, it will be yearned.

After all, that sentence was too shocking.

Yinggao also wants to proudly declare to the world one day that on the territory of my Great Qin Empire, the sun will always shine and never set.