The three body problem

During the cultural revolution, Ye Wenjie, an astrophysics graduate from university witnesses her father get beaten to death during a struggle session by red guards from high school who were supported by Ye's mother and younger sister. Ye is officially branded a traitor and is forced to join a labor brigade in inner mongolia where she befriends a government journalist who enlists Ye's help in transcribing a letter to the government. The letter details policy suggestions