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I am a repair engineer from the future, with first-class skills and superb skills. In this day and age, is there anything I can't repair?

Zhang Yifan is actually a nice person, but he has a certain character that he doesn't want to sit down when he can lie down, doesn't want to stand when he can sit, and doesn't want to walk when he can stand... In order to achieve this goal, he can only keep working hard... I just don't know why, but he has inexplicably made great achievements in the world of science and technology... Zhang Yifan: "I don't know, I'm also very strange..."