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"Jiu Yan: Vacuum Portal" is a Chinese hard-core science fiction epic that spans four thousand years and 12.7 Light years. It begins with a broken bronze abbreviation of Qin Shihuang's burning book, and falls on the top of an ancient locust tree at the end of the Milky Way in 3000 years ago - all the magnificent stories in between are just to answer a seemingly simple question: "If the universe is a door, do humans want to go in or come out?" In 210 B. C., An alchemist left the words "There are nine towers in the sky" in the ashes of Xianyang Palace; in 2129, scientists split the last layer of vacuum with a 0.31 Femtosecond laser pulse at a depth of 47 meters underground; in 2160, 137 graphene giant mirrors on the back of the moon solidified the 9.4 Nanosecond "loss of contact" into a traversable portal; 2187 Years ago, the portal was out of control, and 137 cracks appeared in the Milky Way, and the end of the cracks always points to the earth. The novel uses the three generations of women of the Lin family as its warp and the self-exile of the strong AI "Yan Zhe" as its weft to weave a topological network about "civilization introspection": ? Lin Lan - a vacuum physicist, melted his father's copper coins into the laser and ignited the portal, but hid his personality in the growth rings of the ancient locust tree; ? The Blinder - an AI born from vacuum defects, voluntarily became a door bolt, just to guard the question of "whether human beings are worthy of themselves" for the universe; ? Lin Che, the jump captain, searched for the reflection of her great-grandmother across thousands of years, but found that all star maps were mirrors.