"Daddy." Shang Qianlan knew that she couldn't completely convince Shang Zhengqi, and after eating, she watched Shang Zhengqi go to the courtyard, so she followed without saying a word.

"Lan Lan, this is not a joke, the seeds must be watered quickly when they enter the soil, otherwise the harvest of the next year will be delayed." Shang Zhengqi patiently explained, and he was going to cut the wooden planks to make buckets.

Shang Qianlan stopped arguing, turned around and went into the kitchen, and when she came out again, she had an extra charred wooden stick in her hand.

By the time she told Shang Zhengqi that she had an idea, she had already figured out what to do.

The charred end of the stick served as a pen, and the stake that Shang Zhengqi used to chop wood used as paper, Shang Qianlan drew on the stake for a long time without saying a word, until she drew the prototype she wanted.

"What is this?" Shang Zheng looked at the stake in surprise.

"Barrel car."

Shang Qianlan turned her head and glanced at the Wang family and the second room's house, this matter could not be let this group of 'vampires' know, she also pointed to the cylinder car to do something big.

"Let's put it by the river, and the water will be brought into the field, and you and your mother won't have to water the ground." Shang Qianlan lowered her voice, and then translated the operating principle of the cylinder car into the vernacular and explained it to Shang Zhengqi.

Shang Zhengqi looked surprised, it sounded like the things on the stake had great skills, but how could his daughter know this?

"Lan Lan, where did you know that?" Shang Zhengqi hesitated again and again, but still asked.

Shang Qianlan smiled brightly, "Dad still remembers that I saved an old man in the back mountain with Liangzi the year before last, right?" At that time, when the old man was recuperating from his injuries at our house, he told me about the cylinder car, but I don't remember it well, so I only remembered it today. ”

The original owner did save people when he was playing pigweed, and the old man did teach the original owner to read and write, but he didn't mention the cylinder car in half a word.

These are things she writes down when she supervises the agriculture team and enters the tutorial into the chip.

Of course, Shang Zhengqi remembered this, and because of this, the Wang family asked him to kick the old gentleman out, and the family almost quarreled.

It seems that the one in front of him is indeed his Lan Lan.

"If Dad doesn't believe it, let's try to find a small one according to what I draw, whether it's useful or not." Shang Qianlan saw that his doubts were dispelled, and immediately urged.

Shang Zhengqi thought that it would not be troublesome to make a small cylinder car, no longer delay time, and just raise his hand to do it.

Under Shang Qianlan's guidance, Shang Zhengqi spent three hours making a small mold that looked similar, only as high as Shang Zhengqi's knees.

"I want to make something exactly like what the old gentleman said, we lack a lot of things, can this still be useful?" Shang Zhengqi was already convinced of Shang Qianlan's words.

Shang Qianlan touched her chin, she took it for granted. Although the cylinder car can be called the word 'predecessor' in the history of irrigation, it is not a great challenge to build exactly the same one by one person in a poor and remote place like Qinghe Village.

"Let's try it first." Shang Qianlan didn't know the bottom of her heart, so after thinking about it, she decided to see the effect first.

She brought a basin of water, submerged half of the cart in the water, and gently flicked it with her fingers, and the cart turned slowly, and the small wooden pieces hanging on the wheels submerged in the water, and then surfaced until they moved to the highest point of the wheels, and the water was still dripping.

Useful!

Shang Qianlan looked up at Shang Zhengqi happily, and the latter also looked surprised.

"If you want to water the ground, you have to make it bigger, I'll clean up the guys today, and go to the back mountain tomorrow to chop more wood." Shang Zhengqi is full of energy, and he can't make a bigger one now.

Shang Qianlan was happy and didn't forget to move the cart out of the water, she had to study it again.

Although it can be used, Shang Zhengqi has saved a lot of details because of the hard conditions, and if something happens, her plan will be cold.

Before she could do anything, she had to lay a solid foundation.

Just do what she said, before going to sleep, the ground in front of Shang Qianlan's bed was densely packed with several revisions.

"Drop - the host has unlocked the main line of agriculture."

The familiar mechanical sound sounded in Shang Qianlan's ears, and she was so frightened that she suddenly opened her eyes, only to find that she was actually standing on a grass