A rough estimate is that there must be at least 100 parts of saltpeter after purification.

Gunpowder is a great weapon for civilization, and the more sufficient the material, the better.

"Boss, I'll leave the rest to you, I really can't move..." Zheng Xun smiled bitterly, took a few steps back, and gave Tang Zheng his position.

Tang Zheng flipped his wrist, and a brand new iron pick appeared in his hand.

"I'm going! Boss, you even have a pickaxe..." Zheng Xun knew the goods, and after seeing the quality of the pickaxe in Tang Zheng's hand, he couldn't close his mouth in amazement.

Tang Zheng thought of something and asked again, "Did you know me before? Or, have you seen me before?"

Zheng Xun shook his head.

No wonder.

When Tang Zheng came, he was quite puzzled. He had shown his face in the ruins before, and his popularity in the forum was not low.

But Zheng Xun seems to be oblivious to things outside the window. Apart from being the boss who pays him wages, he has no other identity.

"What's the matter, boss?"

"No." Tang Zheng shook his head without explaining much.

That's fine too.

Just get along like that.

Soon, Tang Zheng picked up the iron pick in his hand and aimed at a saltpeter mine and smashed it down.

"Qing!!"

Tang Zheng's ears tingled with the sharp collision sound.

A powerful counter-impact slammed into his arms, and the tiger's mouth throbbed faintly.

Fortunately, I have the retreat enhancement, otherwise this blow may not be able to shock myself half a step back.

"The difficulty of mining this exquisite mineral is too outrageous..." Tang Zheng gritted his teeth and said in his heart.

But saltpeter ore was an irreplaceable material for gunpowder, and he had no intention of giving it up.

Without a second thought, he raised his pickaxe again.

"Hey!"

"Qing!!"

"drink!"

Chime!

Chime!

Chime!

In the huge cave, the sound of knocking echoed again and again.

Zheng Xun first saw that Tang Zheng was also very difficult to mine saltpeter, and thought he was going to give up.

After all, today's young people, no less rough than his 40 years old man, are willing to endure hardships and stand hard work, especially those who look like small businessmen with money in their pockets, and they are not willing to waste their efforts in vain.

But gradually, along with Tang Zheng's unstoppable movements, Zheng Xun's eyes showed a bit of surprise and moving.

one more time.

The iron pick slammed hard against the solid minerals, making bursts of harsh sounds.

The pick has started to wear out.

He didn't give up.

Every time I fell, the effect was minimal.

It's good luck to be able to splash a spark of sparks.

He didn't give up.

On both palms, the tiger's mouth has been rubbed red, and the wrist is shaking slightly.

He still didn't give up.

The speed is not fast, and the speed of each drop is not fast.

But the strength of the falling, but you can feel that every time you are trying your best.

"The boss I'm with doesn't seem to just have the brains to do business..." Zheng Xun thought to himself.

Of course, Tang Zheng couldn't hear these thoughts.

There was only one goal in his mind right now.

At least mine another saltpeter mine.

Without the saltpeter mine, the subsequent development will be greatly hindered, although he has been leading the world for the past two weeks.

But only in the Stone and Bronze Age lead.

Those side quests, others can also complete, it's just a matter of time.

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