Start with a planet hitting the earth

Seeing Chen Yuan smile.

The girl looked puzzled: "What's wrong?"

Chen Yuan smiled: "Nothing, I just think it's fun, nothing else."

The girl heard it, and she said: "Fun?"

Chen Yuan hummed: "You sell weapons, and I'm just a customer, but you ask me how to sell this thing. Isn't this very interesting?"

He looked at the girl and smiled.

The girl frowned when she heard it: "You are laughing at me."

"This... I didn't." Chen Yuan smiled and said: "I just think it's interesting, not laughing at you."

The girl looked at Chen Yuan, her eyebrows slightly stretched: "It doesn't matter if you laugh at me, your weapon is indeed very strange."

"Nano robots, the name is also very strange, I haven't heard of it before."

The girl said: "This thing can turn into a magic gun, can it turn into other things?" She looked at Chen Yuan curiously.

Chen Yuan said: "Well..., it can turn into many things, for example, it can turn into an arm."

As Chen Yuan's voice fell.

The mini robots began to change, and they slowly spread.

It was originally a fist-sized metal ball, but now it is slowly growing larger and has become a metal arm the size of an adult's arm.

Seeing this, the girl's eyes are filled with a hint of novelty: "It becomes an arm..."

She looked at Chen Yuan: "But, what is the use of this kind of arm?"

Chen Yuan crossed his arms, looked at the girl, and said with a smile: "Of course, it has the function of a normal arm. Simply put, if this thing is installed on the arm of a person who has lost his arm, then the person with the broken arm can operate this arm, which is equivalent to restoring the arm."

Nanorobots can adjust their functions. In addition to repairing other people's injuries.

They can also adjust themselves to be the same as human cells.

Whether it is bone cells or nerve cells, they can imitate them.

So, becoming an arm is actually the same as a normal arm, there is no difference.

When installed on the body, the arm formed by the nanorobot will connect with the wound at the broken arm, and the nerves, bones, muscles and other cells will be connected.

People can get a new arm.

Because of the special nature of nanorobots, the new arms obtained are stronger than their own arms in terms of strength and operability.

Of course, even if Chen Yuan explained these technological knowledge to the girl in front of him, she would not understand.

After all, the civilization she was in was a magical civilization. Although there were some technologies, the explanations were completely different from Chen Yuan's.

Hearing that this arm could be like a normal arm and could also regenerate a broken arm.

The girl's eyes lit up, she walked out excitedly, stretched out her hand, and held Chen Yuan's hand.

Chen Yuan was startled, he looked at the girl.

He found that the girl was a little excited, and he said: "What's wrong?"

The girl said: "No matter what, sell this thing to me, okay?"

She looked at Chen Yuan and said: "My father needs that thing."

She looked at Chen Yuan, with a trace of tears in her eyes.

Chen Yuan looked at her and said, "Do you need it?"

"Yes." The girl said, "My father is a blacksmith. He went out to look for better stones. He lost his arm in an accident... For a blacksmith, losing his arm is a matter of life and death."

She lowered her head slightly and said helplessly, "After losing that arm, my father chose to degenerate. He stopped working as a blacksmith and just stayed in the pub, drunk and dreaming. He looked like he didn't want to live anymore."

"I want to help my father." The girl raised her face and looked at Chen Yuan and said, "Please."

Looking at the girl's big eyes with tears and pleading look.

Chen Yuan looked at her and smiled and said, "This thing of mine is very expensive."

The girl bit her thin lip, "I know, but no matter how expensive it is, it's not as important as my father."

Oh...but what does this have to do with me?

Chen Yuan thought about it and looked at her.

Chen Yuan didn't know her father, and he wasn't interested in knowing her father. For Chen Yuan, no matter what happened to someone he didn't see, it was none of his business.

But looking at the girl's lonely and painful appearance.

Thinking of the girl's cheerful look just now.

Chen Yuan thought for a while and said, "Okay."

The arm turned into a metal ball.

Chen Yuan stretched out his hand and handed the metal ball to the girl.

The girl was slightly startled, she raised her face and looked at Chen Yuan: "What... is this?"

Although she didn't know what Chen Yuan wanted to do, she subconsciously stretched out her hand and took it.

Chen Yuan smiled and said, "I'll give it to you. Just put this thing on your father's broken arm, and it will turn into an arm and become your father's arm."

"Give it?" The girl was stunned. She looked at Chen Yuan: "This thing is so precious, how can it be given?"

The girl said, "This won't work..."

She was a little uneasy.

She looked at the nanorobot and then at Chen Yuan.

She wanted it very much, but morality restricted her, so she didn't dare to accept it so easily.

Chen Yuan looked at the girl and said, "This thing is precious to you, but it's trash to me."

After saying this, Chen Yuan looked at Ya and said, "Let's go."

When Ya heard this, she hummed and followed Chen Yuan.

The girl stared at the backs of Chen Yuan and Ya in a daze, her eyes shining.

Chen Yuan was not lying.

For Chen Yuan, this nanorobot can be built with just one thought.

Its rarity is about the same as the sand on the ground. For the girl who needs it, it is a very precious thing, but for Chen Yuan, it is just like trash.

Chen Yuan doesn't know who the girl's father is, and he has no interest in knowing. He doesn't think that the man's broken arm has anything to do with him.

However, the girl's hearty and enthusiastic smile is what Chen Yuan just saw.

Since a grain of sand can make her smile again, it is worth it.

"Benefactor!"

Suddenly, the girl's voice came from behind.

Chen Yuan paused slightly and looked back at the girl.

The girl said: "My name is Sally, benefactor, what is your name?"

Chen Yuan was slightly startled, and he smiled: "It's just a passerby, I don't need to know the name."

He raised his hand, waved, and walked away.

Sally looked at Chen Yuan's back as he walked away, her eyes shining with a hint of light, and looked at the metal ball in her hand.

Chen Yuan and Ya walked away together for a distance.

Chen Yuan looked at Ya, who was looking at him with interest, with a smile on her face.

Chen Yuan smiled: "What? Have I become more handsome? You keep staring at me?"

Ya smiled and said: "I just think it's interesting. I've never seen you take the initiative to help others before. After regaining your feelings, you are still a little different from before."

Chen Yuan was happy when he heard it. He smiled and said: "My difference, haven't you realized it a long time ago? You were begging for mercy this morning, and now you look much more energetic."

Hearing this, Ya blushed and rolled her eyes at Chen Yuan: "Bad guy."