The concept of 自首 (zìshǒu) is a cornerstone of the modern Chinese legal system, reflecting a cultural emphasis on confession and repentance. Its importance is encapsulated in the well-known official slogan: 坦白从宽,抗拒从严 (tǎnbái cóngkuān, kàngjù cóngyán) - “Leniency for those who confess, severity for those who resist.” By choosing to 自首, an offender demonstrates remorse and saves the state significant resources in investigation and pursuit. This is seen not just as a legal tactic but as a moral turning point. The system, in turn, offers a path to a less severe punishment, rewarding the offender's cooperation.
自首 is a formal term used almost exclusively in legal, criminal, and official contexts.