姑娘你还年轻别把身体累坏
[gū niáng nĭ hái nián qīng bié bă shēn tĭ lĕi huài]
The advice here literally means 'Young lady, do not wear out your body as you're still young'. It is intended as a gentle admonition or piece of life wisdom advocating taking care of one's health while young, suggesting it's more important than striving relentlessly to succeed.