Then, like mercury spreading out, it quickly expanded and advanced forward. And the place they passed, although it was a clean white T-shirt, became whiter than other areas. Little Brother: "..." He couldn’t even speak. After a long pause, he stammered, "Sis... sis, isn’t this a shoe brush?" He thought it could only brush shoes! Chu River gave him a strange look. "It’s all cleaning, cleaning shoes and clothes, isn’t it all the same?" I’m not good at learning. Don’t try to fool me. Can shoe cleaning be the same as clothes cleaning? But Chu River quickly gave a simple explanation: "Just think of them as a group of nano-robots whose job is to break down dirt. They get close to each molecule where they pass, breaking down grime and then periodically discharging it." "Earlier, there were a few dirty little balls near the edge of your shoe, see them? Those are the discharges from the dirt." "This is their core selling point. Regardless of what causes the stains, as long as it’s not part of the clothing fabric, they can take it all away." "And the program has recognition ability, it will take away the cat and dog hair from clothes but won’t take away the fluff from your sweater’s fabric." Little Brother: "..." So amazing! But those stains, he didn’t see anything! Earlier, he was just too shocked to notice the dirt discharges beside these things? They’ve already been trampled underfoot. In short, he tearfully looked at his big sis: "Sis, you’re truly awesome." What kind of person did he follow? Had he known he was such a keen visionary, overflowing with good fortune, he shouldn’t have wasted time on gaming back then! Instead, he should have acknowledged a master in the game, possibly a professional league genius, who could lead his unskilled yet playful self to the top... Little Brother was filled with regret. But right now, helping big sis earn money was the most important thing. "Can they be mass-produced?" "Of course they can. If not for mass production, why would I put so much effort just to make one?" "By the way, this needs to be charged, and its power consumption is a bit high. It requires about 9000 mAh per charge. You just need to provide any standard charging cable at home, plug it in, and it’ll automatically envelop the connector to charge itself." "Additionally, the only downside may be the poor battery life. Each charge takes three hours, and when fully charged, it can clean 5 pairs of shoes or 5 kilograms of garments simultaneously." In the Star Sea Era, every household has energy cores, and charging is instantaneous, so this disadvantage is naturally nonexistence. But, on Mountain and Sea Star, where ultra-micro nuclear fusion reactions haven’t been conquered yet, this is simply wishful thinking. However, Chu River remains very confident. "But there’s a way to compensate for this drawback — just position the charger properly, lay out the clothes and shoes, take it out of the box, and there’s no need to worry." "If the energy runs low, it will recharge automatically." "But after using it, remember to close the box, otherwise it will clean all the clothes and shoes it scans thoroughly." Thankfully he’s a poor learner; otherwise, just listening to this would feel like fantasy tales, as there really isn’t any scientific basis! Nowadays, mass-producing nano-robots and providing such life-oriented services is still a major problem. And Chu River clearly stated the advantages and disadvantages; at this point, he glanced at the silvery liquid climbing up, slightly disdainful: Actually, it’s not slow. It only took 10 minutes to clean a pair of shoes entirely. And for Chu River’s clothing, during the conversation, the progress was already more than halfway. Yet, the developer still mercilessly despised it. ┐(´-｀)┌ The Cleaning Circle working diligently and earnestly, whether it’s Little Brother’s illusion or not, seemed to suddenly freeze, and then moved faster and worked harder. But after watching for a while, the speed seemed unchanged. Really leaves Little Yellow puzzled. Little Yellow asked the last, most crucial question: "What’s the cost? It must be made of some really expensive materials, right?" Chu River pondered for a moment. She calculated carefully. A week’s programming, materials are not expensive on Mountain and Sea Star, but there’s a crucial mutagenic reaction that only the spiritual power of the Star Sea Era can induce. Then there’s the assembly of the micro-mechanical work cabin. Updates are released by novｅlfire.net