Suicide prevention is a collective responsibility, and everyone can be a gatekeeper for suicide prevention. Whether it's the general public, technical responders (such as firefighters, police, etc.), or professional helpers (medical staff, social workers, or mental health counselors), all should possess basic suicide prevention competencies. Based on scholarly literature and expert reports, this article comprehensively outlines 18 fundamental competencies that gatekeepers should have. These include: basic attitudes toward suicide prevention, fundamental concepts of suicide prevention, distinguishing between suicide and self-harm, clarifying myths and facts about suicide, concepts and practices of three-level prevention, understanding suicide risk and protective factors, empathetic skills in helping, basic skills in suicide communication, accurate suicide assessment, ensuring safety, follow-up tracking, familiarity with resource channels, ability to refer resources, role positioning in the protective network, ethical norms in suicide prevention, caring for survivors of suicide victims, and maintaining physical and mental well-being through self-care.