Experiment 727

2189, The 300th anniversary of human colonization of the solar system. Lin Yichen, a doctoral student in biology at the University of Mars, joins a deep-sea exploration mission in order to track down his father who has been missing under the ice of Europa for 12 years. 15 Kilometers under the ice, he discovered an ancient building. The AI that had been sleeping for thousands of years woke up and told him a secret that subverted everything—— Human beings are the 727th experiment created by the Creator. The first 726, all failed. It is not the destruction of civilization, but that all experimental subjects are eventually swallowed up by the same force - the "Great Annihilation", a periodic cosmic catastrophe that "harvests" every advanced civilization that reaches the threshold as accurately as a heartbeat. The creators could not escape, they sealed the last hope in the human body. The ancient genes carried by Lin Yichen are the key to unlocking this key. From the sub-ice ocean of Europa to the black hole at the center of the Milky Way, from the alliance of six major civilizations to the catastrophe of the void insect swarm, he will travel through interstellar ruins, fight against betrayal and conspiracy, and face the ultimate question left by the creator—— The 727th experiment, why must it succeed?