Tech & Life,
A trace of thought.

Eighteen years in the field, and I still can't answer a simple question: what exactly is it that I do? If I sit down and make a list, over these eighteen years I've picked up — maybe not mastered, but at least gotten competent at — something like this: CAD drafting, EPLAN electrical design, test system design, energy-saving systems, HVAC, water treatment, natural gas and coal mining systems, traffic automation, automotive electronics, aerospace power distribution, landing gear, ignition systems for launch vehicles, PCB layout, analog circuit design, power electronics, STM32 and DSP embedded systems, wiring electrical cabinets, PLC programming, host

I'd been wanting to build a small program for handling PDF files — a practical tool to solve problems I kept running into. The thing is, it involves a lot of different technologies, and I could never find enough time to finish it. Then recently, I thought: why not try with GPT's help? I hadn't used Python much in the past few years, and I wasn't familiar with libraries like PyQt or PyPDF. So I decided to let AI fill in the gaps.

I poured myself a glass of sparkling wine, sitting on the couch by the small desk. Outside, the sun was going down, the last light falling across the balcony. The buildings around me were starting to glow. I opened the door and stepped out, leaning against the railing. This city has never been quiet — opening any window brings noise in. That usually bothers me. But right then, it felt solid, reassuring, like proof that the world's enormous machinery was still running. That was exactly what I needed. A few minutes earlier, I had just finished the audiobook of *Norwegian Wood*. I never thought I'd get through thirteen hours of audio, especially an English version. But from the first minute, something locked in. Every word landed clearly, as if it had already been translated into my own language before it arrived. The narrator's voice felt like a melody I'd heard