姑娘你还年轻别把身体玩旧
[gū niáng nĭ hái nián qīng bié bă shēn tĭ wán jiù]
This translates loosely as 'Girl, You're Young; Don’t Waste Away Your Youth and Health'. This phrase carries paternal/maternal advice urging someone to take care of their health and not squander their young vitality recklessly.