Qidian library
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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 wha
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The Journey of Civilization: from Fire to Silicon
A panoramic narrative from the origin of human civilization to the awakening of AI consciousness
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