After suffering a boredom loss, Gu Guo certainly wouldn't follow in the same place again.

It's time to put the production of copper coins on the agenda.

Since Tang's tribe has the ability to imitate Tao Qian, then the birch bark boat can also be imitated, and Gu Guo believes that Tang's tribe has that strength.

Since the James Incident, anything more advanced than his tribe has been on his radar.

For example, if the system hadn't warned him about the fake pottery coins this time, he would have even wondered if there was a traverser in Tang's tribe.

After thinking about it, Gu Guo felt that the top priority now was to refine the bronze first, and the production of copper coins would be postponed. With the anti-counterfeiting ability of glazed pottery money, the tribe of Tang will not be able to figure it out for a while, and it should be able to last for a while.

With the source of tin ore, it is entirely feasible to train more than two dozen smelters to refine bronze during a period of surplus food.

Because some time ago, the people who helped Sang build a kang have a lot of leftovers of clay bricks, which can be used to build two smelting furnaces at this time.

The melting point of tin is even lower than that of copper, only more than 200 degrees, so the smelting furnace for smelting tin ore is more than enough to be built in the style of copper furnaces.

There is a reason why the ancients first developed bronze and then iron, and the temperature of smelting is the biggest root.

Now the only fuel that Gu Guo can use is charcoal, and the temperature after burning in the smelting furnace is about 1,000 degrees, which is completely enough for smelting bronze, but it is not enough for iron ore.

As for the coal coke with a higher calorific value, he could only think about it in his dreams.

The wild wheat fields were firmly enclosed by a fence wall, and a straw man tied with hay was inserted next to it to prevent the birds from pecking.

Wheat fields don't have to be guarded all the time, just weeded every few days. The land chosen by Gu Guo is still quite wet, and there is no need to water the field every evening, thinking of this, the priority of the water conservancy project in the wheat field in the future should be on the premise.

Due to the topography of the river bank in the west and low in the east, the water of the Tao River in the low terrain cannot be directly irrigated through the canal, so it is necessary to build several water wheels to transport the water to the high air canal, and the river water flowing into the air canal and then through the return flow of the canal on the river bank can realize the irrigation of the land.

And for the production of the waterwheel, bronze must be used.

Whether it's bearings in critical parts or tools for cutting wood, all require bronze that is more wear-resistant than copper.

"What the hell am I, what do other people's systems want, but I have to work four jobs by myself, farmers, workers, teachers, leaders, is it easy for me?"

Finding a place where no one was around, Gu Guo complained in a low voice while pinching the clay mold of the hoe.

If he hadn't climbed the tech tree with all his strength, he might have been killed by James in the cave a long time ago.

After crossing, although he was a little aggrieved, the surrounding clansmen were getting better day by day, and the smile on his face was like a rising sun, Gu Guo felt that the sweat of the past six months had not been in vain.

"Well, maybe I've been a toiler for the rest of my life. I hope that I can contribute a little more in this life, and have a good baby in the next life and enjoy it. ”

"No, no, according to the meaning of the system, it seems that there is more than one system in the world, just on this planet, I met one, in case I was taken as a fool by the protagonist of the world's own system when I was eating, drinking and having fun in the next life, I would lose a lot of money!"

"But how can I meet so many protagonists? Keep it low...... It's all right, right? ”

Gu is at war with the people in the country, and he just wants to find an excuse for being lazy in his next life.

But the existence of those systems that are different from his own system makes him like a man, just like the days on duty in the unit in his previous life, which obviously sounds like an easy errand, but he must always pay attention to the movement of the walkie-talkie, and think about whether he can cope with it alone if there is a certain failure.

Nameless irritability.

He chewed on the rhizomes of the weeds, and the bitter astringency jumped on the tip of his tongue, pulling his mind back at once.

Staring at the hoe mold in his hand that had been deformed due to cranky thoughts, Gu Guo reached into the clay pot with his right hand and dipped it in some water, resetting the deformed place.

Since you can't go back to the original world, let's do it freely!

The construction of the two smelting furnaces is extremely smooth, and Rika as the general person in charge is directing the clan to cap the furnace, at this time she has completely understood the copper smelting method, and is leading Hongmei and others to burn charcoal.

In the primitive era, there was firewood everywhere, there was a primeval forest of more than 100 hectares near the Tao River, just in the upper reaches of the Gu tribe, after the tribesmen cut it down with a stone axe, they were tied with a bark rope and put it on the Tao River all the way down, often more than a dozen bundles of firewood as long as one person followed, be careful not to let the firewood run aground, and there were people in the downstream to respond.

In this way, the efficiency of transporting firewood is very fast, and thousands of catties of firewood can be obtained in a day, and it only needs to be dried in the sun for a few days before it can be used.

A group of people gathered around the charcoal kiln, using the residual heat released by the kiln to bake some tubers, Hongmei did not continue to burn pottery money under Gu Guo's instructions, and if it continued to burn, the pottery money would depreciate.

She didn't understand the meaning of depreciation, but she knew that the more pottery money, the fewer clay pots could be exchanged.

Hongmei hates the tribe that counterfeits pottery money very much, and wants to exchange pottery money directly for food and animal skins, why should it be fake?

Gu Guo said that the cost of making fake pottery money is far lower than the cost of hunting in person, and his sentence is based on the mature pottery making process, for those tribes who are still kneading pottery with clay strips, it is better to hunt with bows and arrows when there is time to make fake pottery money.

Hongmei naturally couldn't delve into the economic knowledge in it, just trying to understand the impact of the appearance of fake money on real money had already consumed a lot of her brain cells.

I took a bite of the roasted tuber, and the slight sweetness of the starch spread in my mouth.

"What kind of change will this thing called bronze bronze?"

Thinking back to firing copper years ago, only a few hammers, a gong and a pair of tongs were made, Hongmei, a preschool graduate, really can't think of a broader future for copper metal.

It has been more than a month since Tang left, and until now, the people of the Tang tribe have never come to trade by the Tao River.

Gu Guo didn't take it to heart, the other tribe didn't have a traverser, even if the productivity of the Tang tribe was more advanced than his own at this time, as long as he refined the bronze, it would be a matter of minutes to overtake in the corner.

The house where the pots were stacked has been emptied, and now whenever new pottery is made, it is distributed to the houses of the tribesmen in order.

At this time, there were two piles of ores of different colors piled up in the house, one was red and the other was black.

After a month of all-out transportation, Gu Guo collected several tons of cuprite and tin ore, which could be fired at least nearly a ton of bronze, which was completely sufficient for making farm tools and waterwheels.

Bronze, at last, is about to be born in this primordial world.