The word 关心 (guānxīn, "to care for") is formed through a vivid conceptual metaphor. It combines the character 关 (guān), which in this context carries the abstract sense of a "gate", "junction", or "pivotal connection", with 心 (xīn), meaning "heart" or "mind". The compound thus visually and notionally constructs the idea of "linking one's heart to" or "having a heart-gate connected to" someone or something. This formation doesn't describe a physical action but evokes the image of opening a passage from one's inner core of feelings and attention toward an external subject, elegantly capturing the essence of emotional concern and attentive regard.