Cixin Liu’s first novel of the Remembrance of Earth’s Past trilogy, serialised in Science Fiction World in 2006 and published as a book by Chongqing Publishing Group in 2008; Ken Liu’s English translation, Tor Books, 2014. It won the Hugo Award for Best Novel in 2015, the first translated novel to do so. Its subject is first contact conducted as a three-second transmission by one astrophysicist at a Chinese listening post, and four hundred pages of consequences.
Red Coast and the three seconds
Red Coast Base, a twenty-five-megawatt transmitter on Radar Peak in the Greater Khingan Mountains, carries a cover story about disabling enemy satellites while its real brief, set out in a chapter of invented declassified memoranda, is a Chinese search for extraterrestrial intelligence begun in the late 1960s. Ye Wenjie, an astrophysicist sent there as a political prisoner after her father is beaten to death in a struggle session, works out from the operations log that the base’s solar interference follows Jovian radio bursts by sixteen minutes and forty-two seconds, exactly the extra path from Jupiter to the sun to Earth rather than straight to Earth, and concludes that the sun amplifies any signal above a power threshold by roughly a hundred million times. Refused a test on political grounds, she runs one anyway in 1971 and hears nothing back. Eight years later a reply arrives from a listener who warns her three times not to answer, because any reply will locate its source; she answers in a burst of under three seconds, inviting the sender to come and conquer the Earth.
Contact as a switch
The novel’s central proposition, credited in the text to a sociologist it presents as Bill Mathers of the RAND Corporation, is that contact with an alien civilisation is a symbol or a switch rather than an event with content: the bare confirmation that someone is out there, amplified by mass psychology, is enough to destabilise a civilisation whatever the message says, and a monopoly on that contact is worth an army. The second half of the book is the demonstration. Across four light-years Trisolaris sends Earth one radio transmission and two Sophon particles, and by the last page humanity has split into factions that want their own species conquered, its best theorists are dead by their own hand, and three accelerators on three continents return different results for the same collision. The same worry, with no aliens in it, was put to NASA by the Brookings Report 1960.
What it is not
Fiction, and evidence of nothing. The Dark Forest Hypothesis is not in this volume: it is argued in the sequel and asserted in Liu’s own postscript, and what this book contains is the defector who breaks it, the unnamed listener who sends the warning. The one claim in it with numbers attached is the sun as amplifier, and a hundred-million-fold gain on twenty-five megawatts comes to a few times ten to the fifteenth watts. Reviewed on this site in September 2026.
Connections
Cixin Liu · Sophon · Trisolaris · Dark Forest Hypothesis · Shooter and Farmer Hypotheses · METI · SETI · Project Hail Mary