你是太阳深拥必伤你是月亮久放必凉
[nĭ shì tài yáng shēn yōng bì shāng nĭ shì yuè liàng jiŭ fàng bì liáng]
Metaphorically, 'You are the Sun - deep embrace must hurt; you are the Moon - keeping away too long makes one cold.' Describes the delicate balance and mixed feelings of love, warmth, and potential harm from close/intimate relationships vs. emotional distance.