There are five time zones in China, but the nation uses a unified time—Beijing time. When the hour turns, all radio stations sound six beeps, followed by a solemn announcement: “At the last beep, it is Beijing time seven o’clock sharp.” This memory is reliable because it does not belong to me but to generations of Chinese people, millions of us: every hour, the beeping and the announcement were amplified through loudspeakers in every People’s Commune, school, army camp, and apartment complex