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The story of Lin Yu, an ordinary college student, who accidentally bound to the "sign-in system" and completely cheated his life. He was originally at the bottom of his class and had no sense of existence. He only needed to complete a simple sign-in every day to unlock a variety of incredible skills - from the god-level learning talent of photographic memory, to the top hacking skills in the Internet, to the fighting ability, clairvoyance, and wealth codes that are far beyond ordinary people... Everything that was once out of reach has become within reach with the sign-in. In class, he counterattacked from a scumbag to a top student with perfect scores, astonishing his teachers and classmates; on campus, he easily slapped the arrogant rich second generation in the face, winning everyone's admiration; out of campus, he used the abilities given by the system to solve business problems, uncover hidden conspiracies, and even save the world in critical moments... But superpowers bring not only a halo, but also challenges that come one after another: the prying eyes of mysterious organizations, competition among people with similar abilities, and the secrets hidden behind the system...