Five Notes and Twelve Temperaments

History is a tampered tune, and you have to use your own memory as the strings. In 2026, Shen Wanggui broke one of the strings on his grandfather's seventh anniversary - the "Heming" guqin was missing one string, and the two words left by his grandfather were engraved on the bottom of the piano: Wanggui. The grandfather who disappeared seven years ago only sent one text message: "You finally played. I'm waiting for you in the sound range. - He Ming." He followed the sound of the piano into the "sound field" and discovered that history was never written by history books: Ji Kang's "Guangling San" has never been lost, Yang Yuhuan hid "Neon Clothes" in the sound field, and Cai Wenji's "Eighteen Beats of Hujia" originally recorded a Han-Hungarian peace agreement that had been deleted by successive dynasties. The person who protects these "forgotten truths" is called the Five Sound Walker; the one who tamperes with history is the Twelve Rhythm Division to which he belongs. He entered the "sea of ​​laws" and "absolute sound" again and again, and his memories were peeled off layer by layer - the fuzzy layer, the fragmented layer, the replacement layer, the empty layer, and the existential layer. He forgot his mother's face, forgot Su Nian's name, and finally lost sight of "who he was." And the person who made him "get to know each other again for the tenth time" was always Su Nian: "My name is Su Nian. I major in pipa." When the binary battle between "open memory" and "order control" came to an end, Shen Wanggui heard the proposition of the outsider and found a fourth way - not to make it public, but to return the key to memory to himself. If a piece of music has been changed, can the person playing it tune the strings back?