A love letter from the past, a classical game, usher in a bizarre cyberworld; a sea of ​​electronics, a mirror planet, a cloud of doubt behind the illusion of prosperity; a dark age, hidden for a thousand years, demons roam rampant beneath the veil of paradise; foolishness and blindness, billions of glories, for whom are the songs of the past quietly played? A flirtatious man from Zurich, holding a double PhD in geophysics from the Swiss Federal Institute of Technology; a rising star in the European piano world, living in Vienna; a gray ghost, a hacker, wandering the cybercity despite low blood sugar; a world-weary and aloof daughter of a prominent family, a high school sophomore, running away from home and exiling herself; the curtain rises on a mad era, and the believer Hearn, combing her hair, holds up a black umbrella, steps into the rain curtain of time...

The ancients determined the seasons based on the direction pointed by the Big Dipper. Today, we have a new Big Dipper, spanning the skies above us, becoming our "eye in the sky," safeguarding national security and serving society and the people's well-being. This is the BeiDou satellite navigation system, independently developed and built by my country. The novel depicts the arduous and magnificent construction process and the growth of each individual along the way. Like the Big Dipper, they shine like a starry sky.