The neutral tone is formed as a result of multiple factors, which, phonetically, include simplification, labor-saving or economical orientation, rebalance in the phonetic system and in rhythm.

• 摘要轻声是一个多层面因素共同作用的结果，在语音层面上有语音系统的简化、省力律和经济律、语音系统内部的重新平衡、韵律美要求这4个成因；