‘Tóng xīn’ literally means ‘child heart’—a compound of 童 (tóng), meaning ‘child’ or ‘youth’, and 心 (xīn), meaning ‘heart’ or ‘mind’. It does not refer to a physical organ but symbolizes the pure, unguarded, imaginative, and trusting inner quality often associated with young children: curiosity without cynicism, wonder without judgment, and sincerity without pretense.

This term is deeply valued in Chinese culture and philosophy, especially in Daoist and Confucian thought, where preserving one’s tóng xīn is seen as essential to authenticity and moral integrity. It appears frequently in literature, art criticism, and education discourse—not as naivety, but as a cultivated state of openness and emotional honesty. Adults are sometimes praised for retaining their tóng xīn despite life’s complexities, suggesting resilience of spirit rather than immaturity.