I was an early IT practitioner. Although I was eliminated by Huawei in the last round of interviews in 2002, I still went to an IT company of a larger BTC supplier. So although I later changed industries, I was still in the circle. In 2010, I was responsible for data processing in a multinational group. Then a friend in the IT circle told me that I could mine BTC without spending money using the company's server. I soon found an application, but the running process was full of twists and turns. In the end, I found that it was poisonous. It was too late to uninstall it. Finally, the company's server crashed, I was fired, and I didn't mine BTC.