菇凉前途无量别把身体弄脏
[gū liáng qián tú wú liàng bié bă shēn tĭ nòng zàng]
'Gu Liang Qian Tu Wu Liang Bie Ba Shen Ti Nong Zhang' is an affectionate and slightly cautionary nickname meaning that a young lady (often used to address females who aren't necessarily adults yet) should protect her body and health so she can face a limitless future ahead without tarnishing her well-being or integrity. 'Gu liang' can be an endearing word similar to 'lady' but it sounds very colloquial in Mandarin.