相辅相成

• Pinyin: xiāng fǔ xiāng chéng
• Hanzi breakdown: 相 = 木 + 目 (mutual); 辅 = 车 + 甫 (carriage spoke — assist); 成 = 戊 + 丁 (completing a form)

Meaning

To supplement and complete each other; mutually reinforcing; said of two things that work together harmoniously, each supporting the other.

A chengyu describing an interdependent, complementary relationship where each element enhances the other rather than competing. Common in discourse on education, strategy, philosophy, art, and policy.

Examples

1. 理论研究与实践应用相辅相成，任何一方的缺失都会制约整体发展。 Theoretical research and practical application complement and reinforce each other; a lack of either will hold back overall progress.
2. 传统文化的传承与现代技术的创新相辅相成，共同推动社会进步。 Passing down traditional culture and innovating with modern technology complement each other and together drive social progress.
3. 良好的家庭教育与学校教育相辅相成，方能培养出全面发展的人才。 Strong family education and school education complement each other; only then can well-rounded people be cultivated.

Usage Guide

Context: academic, philosophy, policy, education, business

Tone: analytical

Do Say

• 硬实力与软实力相辅相成，共同构成一个国家综合国力的重要基础。(Hard power and soft power complement each other, together forming an important foundation of a nation's comprehensive national strength.)
• 质量管控与创新研发相辅相成，缺一不可，才能确保企业持续竞争力。(Quality control and innovation in research and development complement each other; neither can be absent if a company is to maintain sustained competitiveness.)

Don't Say

• 他们两人相辅相成地一起工作 — 相辅相成 is a predicate; do not add 地 + verb after it; simply say 他们的工作相辅相成

Origin & History

相 (mutually) + 辅 (assist/supplement) + 相 (mutually) + 成 (complete/fulfil) — each assists and completes the other

Cultural Context

Era: Classical to Modern

Generation: All ages

Social background: Universal