"I bought a lot of toy cars recently, but these things are hard to sell. If you want them, I'll give them to you cheaply." The old man held the packet of tea in his hand and led the way.

He kept saying it was cheap, but he wouldn't suffer any loss.

The old man pushed the toy cars in front of her, saying, "They're all here, take a look and pick one."

Lin Yuxi squatted down and rummaged through the inside. She was looking for something with a remote control, mainly the motor from a toy car, preferably a larger one, so she could take the motor out and use it as an auxiliary tool.

I picked two out of them, both with motors, but they seemed to have some poor contact.

"I want these two. Do you have plastic tubes?" Lin Yuxi put the two toy cars away.

The old man nodded and went to the other side to find her a plastic tube.

A small packet of tea brought a shortcut.

In a short while, the old man found almost everything Lin Yuxi wanted. There were several kinds of plastic pipes, and she picked out about four sections of pipes about two fingers thick. Then she found a few T-joints.

"What can you do with all this stuff?" The old man frowned, looking at the tattered items she had brought, which couldn't be pieced together at all.

Lin Yuxi packed everything up, paid for it, and said, "Take the pipes to play in the water."

The old man practically had the words "extravagant and wasteful" written all over his face, but looking at the one cent in his hand, he still managed to make a net profit of three cents.

Lin Yuxi put these things into her pocket and then tied them to her bicycle.

There were spare wires at home when we connected the cables before, so she doesn't need them now, but she needs to buy a soldering iron because the toy car's motor is definitely broken and needs to be fixed.

After wandering around Xinluo Town, it was getting dark, and Lin Yuxi had bought most of her things before riding her bicycle back home.

An hour later, Lin Yuxi returned the bicycle she had borrowed from Gu Chen.

In the afternoon, Lin's mother cleaned the mud-brick house seven or eight times herself, and after dismantling the bamboo, she rearranged it all. Now the smell is gone.

The next day.

"This thing doesn't seem too difficult. Let's take it apart and try." Lin Yuxi disassembled the motors of the two toy cars, reconnected the loose wires, and then took a piece of plastic to make a water pump blade. She drilled a hole in the middle of the blade, installed it on the motor shaft, and only after making sure it was securely installed did she drip in glue.

Cut a transparent plastic tube diagonally, then sand it to make a drain pipe for the water pump. Connect it to the middle of the plastic sheet and finally wrap it with tape.

"It should work now, I'll try it in a bit." Lin Yuxi carefully examined the motor in her hand. It was about the size of her palm, but one motor was definitely not enough, so she connected two motors together.

Qinghe Village is located at a low elevation. If it weren't for the distance, using a siphon would be more convenient. However, if the reservoir were built higher than the loess slope, a single water pipe would suffice, making it even more convenient.

Taking advantage of the fact that no one was around, Lin Yuxi took out Zhuang Zhenhua's bicycle from her spatial storage, removed one of the wheels and the disc brake, and then removed a gear and assembled them together.

She planned to make a water pump using bicycle rims, but the pressure wasn't enough, so she had to use two generators from a toy car to power it.

I drilled fine holes in all the hoses I bought, then made a "T"-shaped water-saving sprinkler, and finally used a bottle to stabilize the pressure.

Seeing that it was still early, Lin Yuxi moved her things out, then filled a bucket with water and carried it to the two fields behind.

After setting up the generator, I tested it and the spray system. Dense water droplets sprinkled evenly on the field like rain, and also on her body.

Lin Yuxi raised her hand to look at her watch and observed carefully. However, the motor stopped working after running at high speed for about five minutes because it was too hot. After the motor cooled down, she put it into her space when no one was around.

"The motor is still too small. Although it didn't cost much, it does have a limited lifespan."

After thinking for a moment, she came to a conclusion. Just as she was about to carry the bucket to the kitchen, a large hand reached over her arm and lifted the bucket in front of her.