advanced-technology alien-contact alien-invasion aliencontact apocalyptic artificial-intelligence astrophysics bestseller book-1 chinese-history communication-with-aliens cultural-revolution dark-and-foreboding dark-forest-theory dystopia dystopian-future epic ethical-dilemmas existentialism exploration extraterrestrial-intelligence fermi-paradox ficliu fiction first-contact game-theory general hard-science-fiction hardsciencefiction hugo-award hugo-award-winner human-alienencounters humanity humanitys-survival imaginarywarsandbattles interstellar-communication liu-cixin military-strategy mind-bending mystery nebula-award newyorktimesbestseller nyt:trade-fiction-paperback=2020-09-27 philosophical philosophy physics political-intrigue quantum-physics remembrance-of-earths-past remembrance-of-earths-past-series remembrance-of-earths-past-trilogy science-fiction sciencefiction space-exploration space-opera speculative-fiction technological-advancement technology the-remembrance-of-earths-past three-body-problem time-travel trilogy virtual-reality war-strategy worldbuilding