Rebirth in 1949, a Technologically Powerful Nation

April 1949, April day in Princeton. Lin Qiming, a Ph. D. In mathematics, woke up from a dream with two worlds in his mind: one was 1949, when the electron tubes were buzzing in front of him, and the other was the computer empire that he had been working for his entire life seventy years later. He could see the progress of every research—storable program computer, 12.7%, Direction unknown. But the progress bar only gives directions, never answers.