At 4 a.m., the last street lamp in the city went out, but I was awakened by a faint "clicking" sound from the warehouse. That was our newly introduced circuit board recycling equipment starting to "devour" materials. The conveyor belt fed pieces of waste motherboards into the steel-toothed shredder, instantly turning them into fragments the size of a fingernail. Outsiders might mistake this for noise, but I heard it as the prelude to a green future. Ten years ago, I worked as a repairman in Huaqiang North, Shenzhen, throwing broken boards into the trash every day. Later, I went to Guiyu and saw workers using charcoal stoves to roast boards to extract chips, with acidic liquids flowing everywhere and children stepping barefoot in lead-contaminated mud. At that moment, I realized that if we couldn't handle it properly, every repaired phone we fixed would leave a scar on the other side of the world. So I invested all my savings in research and development, determined to create a machine that "devours" circuit boards but "spews out" resources. This equipment is like a silent assembly line chef: after shredding, magnetic separation sorts out iron; eddy currents eject aluminum; density sorting separates copper particles from resin sand; finally, high-temperature anaerobic pyrolysis turns the remaining epoxy powder into combustible gas, powering the entire line. It can process one ton of boards per hour with a recovery rate of over 95%, leaving only glass fiber powder as tailings, which are compressed into manhole covers without any odor. What was once an unwanted electronic waste has been transformed into a recyclable "urban mine". Last year, an African client came to our factory and picked up the just-sorted copper particles, his eyes welling up with tears. He said this copper was enough to build a rural primary school, whereas in the past they could only rely on incineration. At that moment, I understood the warmth of technology. It's not just gears and electricity; it's also a language that turns pollution into hope. Today, the equipment is exported to 20 countries, reducing carbon emissions equivalent to planting three million trees annually. At night, I still go to the warehouse to listen to the rhythm of metal collisions. That sound tells me: every discarded circuit board isn't the end of the world, but a tomorrow waiting to be awakened. As long as the recycling equipment keeps running, the Earth will always have a restart button.