The Three-Body Problem | part 2 (audiobook)

Part 2 of 2
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During the Cultural Revolution, Ye Wenjie, an astrophysics graduate from Tsinghua University, sees her father get beaten to death during a struggle session by Red Guards from Tsinghua High School. Ye is branded a traitor and is forced to join a labor brigade in Inner Mongolia, and is later sentenced to prison, where she is recruited by Yang Weining and Lei Zhicheng, two military physicists working under Red Coast, a secret Chinese initiative to use high-powered radio waves to damage spy satellites.
After working with them for some time, she learns that the stated purpose is a front for Red Coast's true intention: the search for extraterrestrial life. Ye discovers the possibility of amplifying outgoing radio waves by using microwave cavities within the Sun and sends an interstellar message to test her theory, but tells no one else. Eight years later, now in a loveless marriage with Yang, Ye receives a message from a concerned alien pacifist from the planet Trisolaris in Alpha Centauri, warning her not to respond or else the inhabitants of Trisolaris will be able to deduce the Solar System's location (based on the time it takes them to receive her response to their messages) and invade Earth. Disillusioned by the political chaos and having come to despise humankind, Ye responds anyway, inviting the Trisolarans to come to Earth to settle its problems. She murders Yang and Lei to keep the alien message secret.