Qin Shi Huang was surprised when he saw this. The importance of oil to people is self-evident. How many people risked their lives hunting in order to replenish oil and water?

Now, you only need to press the beans to get oil...

After the bean cakes were filled, a worker pushed the cart and went to the pig farm with the workers who were transporting the sweet potato residue.

When the common people watched the piglets grunting as they ate their feed, distress and longing appeared on their thin faces.

Such good food can be given to people to eat, it’s such a waste!

All the officials stared at the pigs being butchered, feeling a chill in their crotch. However, Fusu keenly caught the pig butcher's mumbling, and with a thoughtful look on his face, he immediately made a suggestion.

"Father, it seems that castrating the pig will remove the fishy smell. Why don't you have a few jailers try it out?"

"Alright, then I'll leave this matter to you."

Qin Shi Huang naturally would not object to anything that benefited the people. He nodded and replied calmly.

After the sky screen displayed the factories in the north area, it presented scenes of the factories in the south area.

"Hey, what is this black stone?"

Fusu, who was well-read, was stunned for a moment. He had never seen such a mineral. The other ministers all shook their heads to indicate that they did not understand it.

After a while, Tianmu gave the answer.

The shirtless workers threw the black stones into the furnace one shovel at a time, and the pig iron blocks were gradually melted. Seeing this, everyone present understood that this was iron smelting.

"Your Majesty, this iron smelting method is even better than the one used in the workshop. The iron smelted here is even harder and more resilient."

The Shaofu, who was in charge of the workshop, pondered for a long time and saw some clues. He immediately reported to the emperor excitedly.

Qin Shi Huang had some doubts in the beginning, and now he was overjoyed. He patted the Shaofu on the shoulder, his voice gentle but majestic.

"Then I'll trouble you to test this iron smelting method."

"Yes, Your Majesty! However, the charcoal may not be hot enough. We need the black stone."

The Shaofu did not dare to be arrogant and reported truthfully.

Qin Shi Huang showed no sign of worry, his deep eyes were full of confidence in victory. He laughed out loud, and in his laughter was the arrogance and heroism that only belonged to an emperor.

"Zhao Gao, pass the order down!"

"If anyone in the world finds the Black Stone, I will reward him with a hundred gold coins and grant him an official title and nobility!"

At the same time, a commoner from Taiyuan County who went into the mountains to hunt took his eyes off the sky, his face filled with ecstasy.

Staring at the black stone in his hand in a trance...