He said with a dark face, "You'd better have something important to say." Doesn't he know that disturbing a child's sleep is the biggest obstacle to their growth?

The little system didn't notice anything wrong with Sun Kaicheng. This guy always had a stern face and tried hard to act like an adult; it was used to seeing him with a black face.

"Take a look at these things, is there anything that needs improvement?"

Sun Kaicheng looked at the picture on the screen in front of him: "Is this a waterwheel? What are you doing with this?"

"Oh dear, this is a blueprint drawn by my host. There has been very little rain in our area this year, and the river level has dropped. The drainage ditches we dug before are too shallow to draw water, so we have to rely on manpower to carry water. My host feels sorry for the villagers, so he thought of building a waterwheel to bring the river water up, so that the villagers wouldn't have to carry water to irrigate their fields."

"My host doesn't know much about this, and I don't have much knowledge about it either. I was just thinking of asking you, a smart person, to take a look. Is that alright? Is there an easier way?"

"Does your host know you're asking me this?"

"No, my host only knows that I have a boss who works for me, and that he is a boss in another time and space. Don't let me slip that out."

It knew it wasn't good to keep this from its host, but it couldn't help feeling that it shouldn't tell its host. Luckily, this big oaf cooperated. But this person shouldn't be called a big oaf anymore; he looked like a little kid, a little kid who wasn't even as tall as his host.

Of course, it knew it couldn't say this out loud. If it angered the boss, how would it get gifts for its host?

Sun Kaicheng... You're really something. I don't know if you're my system or your host's system.

If I say it's your host's system, your host knows less than I do. If I say it's my system, all you know is to use my things to fill your host's gaps.

Now that he was awake, and considering the food issue was at stake, Sun Kaicheng wasn't so angry anymore and started reading seriously. This kind of knowledge certainly didn't exist in the apocalypse; he had learned some of it from the books in his grandfather's study.

Waterwheels appeared early, and there were many different kinds of waterwheels in each dynasty. Of course, each kind of waterwheel was suitable for different bodies of water. Fortunately, he had been to the hometown of the small system host and had seen the river there.

The host of the small system is quite clever; it's impressive that he was able to extract such a waterwheel from so little data. However, he may lack familiarity with this area.

"Why doesn't your host get a modern machine to replace this ancient waterwheel?"

"It seems that the machinery needs diesel or something. You know how poor my host's hometown is, so they probably can't get those things."

Sun Kaicheng nodded, agreeing with his thoughts. He took out a piece of paper and redrew all the areas that needed improvement, even calculating the standard dimensions.

"Alright, I think this should be fine. Let your host take a good look and see if there's anything else that's not right. If so, you can come to me again."

"Okay, then next time I answer your questions, I won't ask for any reward. Consider it compensation for changing the drawings."

Sun Kaicheng...you're being rather polite.

He waved to the little system to hurry up and leave, lest it stay and annoy him. However, thinking about the weather in the next few days, he couldn't sleep, so he started drawing blueprints in the study in the space.

The best thing to use right now is a water pump, which can pump water up to any level. If he can develop a low-cost, compact, and fuel-efficient water pump, it will help farmers cope with the upcoming drought.

By the way, some areas are still experiencing floods, and these water pumps are very helpful in dealing with floods. The host of the small system can't obtain these materials, but they are not difficult for him to acquire.

This may be the difference between Sun Kaicheng and Qian Xiao. They are in different positions, so the direction of what they want to do is different, which corresponds to the saying that those who are successful should help the world.

Qian Xiao slept until almost nine o'clock before opening her eyes. Looking at the glaring sun outside, she jumped up. There was no time for her to be lazy now. The sooner the waterwheel was finished, the sooner the villagers could be freed from heavy labor.

As soon as I opened the door, I saw my grandmother sitting in the shade doing needlework: "Grandma."

"Get up, hurry up and wash up and eat. Did you stay up late last night?"

"Hmm, where are the seven eggs and eight eggs?"

"They've all gone to the fields. The most important task now is fetching water. These children have all gone to play in the water. It's cool there, and there are adults around, so they're not afraid of anything happening."

"So you don't need to go to school anymore, right?"

"The exam is over. I'll check the results in a week."

"Okay, then rest well at home. I'll go check on things once you get up. Carrying water in this weather is such a hassle."

"Grandma, I'll go check it out. I can bring some water to Grandpa and the others."

"That's fine." The old lady knew that her legs were weak and she couldn't carry much water even if she delivered it.

Qian Xiao slurped down a bowl of porridge, then ate a pancake as she walked. When she reached the edge of the field, she saw a lively scene. It wasn't the hottest time yet, so people still had some energy.

The afternoons are the hardest to endure. If it weren't for Grandpa Zhang's cooling tea, I don't know how many people would have collapsed from heatstroke.

"Grandpa."

"Erdan, are you bringing water to your grandpa and the others?"

In their village, drinking water comes from wells, and river water is only used for irrigation.

"Yes, the blueprints have been drawn up. I was thinking of having my second uncle come back with me to make a small one first to see if it's feasible. If it is, then we'll make a larger one and install it in the river."

The old man was startled; he really didn't know this girl was serious. But whether she succeeded or not, he had to praise her.

"Good boy, if it really works out, the whole village will thank you properly."

“Grandpa, I don’t like hearing you say that. This is my home. It’s only right that I do things for my family. Don’t thank me. Alright, we need to hurry up. I’ll go find my second uncle to help me. Please sit down.”

"Alright, go quickly. Grandpa will come over to see what kind of waterwheel you made later."

"OK."

Qian Xiao walked over to her grandfather. Her grandfather was so old, yet he was carrying water like a young man. Qian Xiao took the carrying pole from her grandfather's shoulder and said, "Grandpa, let the young man do this. Can your body handle it?"

Old Qian chuckled, "It's nothing, I'm in good health. Why did you come over? Didn't you rest at home?"

"Why would I rest at this hour? I just wanted to go back to my second uncle to help me make a model of a waterwheel, to see if the waterwheel I drew is usable."

"Oh my, you finished it so quickly! You'd better hurry up. If you finish it sooner, we can save ourselves some effort. Your second uncle will be here soon. Let him go back with you."