Genius cryptography student Wen Renyao accidentally discovered that his family's "red seal anti-counterfeiting" actually contained the principle of blockchain hashing. When his grandfather's "Imperative Seal" was maliciously tampered with, he used the RSA algorithm to reshape the command's immutability, and even used the "Seal Seal" combined with zero-knowledge proof to lock in key evidence. With the help of the technical genius Chen Mo, the female judge Shen Yanqiu, and the obstruction of the conservative Zhou Ding, Wen Renyao promoted the establishment of the "Seal Cryptozoology Judicial Center", used classical cryptography to decipher the nine-fold seal contract, and upgraded the thousand-year contract system with modern protocols. A judicial game centered on "seal dictatorship" began. Wen Renyao relied on cryptography and contract wisdom to defend justice inside and outside the court, and finally promoted the "Digital Seal Bill of Rights". In the blend of ancient cinnabar and modern code, a new chapter in the rule of contract law was created.