String Century

Deep space is not empty. In the gap of the ten-dimensional universe, someone is knocking. The Xingyin Federation's old array captured a signal that should not exist - 4.217 Terahertz, a single frequency, continuous visible light. Frequencies are not random numbers. It is 4.217 Times the frequency of the hyperfine structure transition of hydrogen atoms. Accurate to three decimal places. In that direction, the nearest human colony stands one hundred and twelve light-years away. No one knows what it is. But the five civilizations on the five films all saw the same light. Humanity, the Lava Empire, the Hollow Merchant Alliance, the Imaginary Council, and an existence that does not exist on any star map - it saw the same pattern four and a half million years ago. It's waiting for the second time. Physics official morning decodes signals on Tianwen. Gray, the night watchman at the relay station, has been guarding the relay station for seventeen years, not knowing what he is guarding. A mid-level commander of the Imperial fleet discovered what the Empire was hiding on its borders. A disembodied civilization of pure mathematics did something they had never done before. Five roads. Five strings. Leads to the same door. Behind the door, someone is waiting. ——1400 Years of waiting. 17 Cycles. Heartbeat rate of 0.17 Hz. A door closing. Xian Century, exclusively released on Qidian Chinese website.