Introduction: When a violent solar storm resonates with the Earth's magnetic field, a disaster called the "Great Silence" strikes. The sophisticated electronic equipment on which modern civilization depends has been instantly reduced to scrap metal, and the world has fallen into darkness like an information island. Xiao Yan, a student in the Department of Electronic Information Engineering, dug out his grandfather's relics from the ruins - an old-fashioned transistor medium-wave radio, and accidentally captured the regular "ticking" sound. He formed an alliance with Lin Wanzhou, a history student who guarded ancient books in the ruins of the library, and deciphered the Morse code from a yellowed "Amateur Radio Operation Manual". He also discovered that the crystal detection principle of the ancient "ore radio" was actually the key to resisting magnetic field disturbances. Using discarded parts to assemble a crude "geomagnetic frequency meter", they must adjust the frequency band according to the "breathing" of sunspots and open up an information channel in the ocean of magnetic storms full of interference. From point-to-point distress signals, to simple radio stations in survivor communities, to the "Chinese-Polish City-State Alliance" covering the area, Xiao Yan used forgotten "backward" technology to weave a decentralized life communication network in the era of desperate magnetic field chaos. This is not only a restoration of technology, but also a story of a human community sailing through the night again on the ruins of technology, relying on wisdom, collaboration and the fire of inheritance.
