陪我从齐肩短发到长发及腰
[péi wŏ cóng qí jiān duăn fā dào zhăng fā jí yāo]
'Stay by me from shoulder-length hair to waist-length', indicating loyalty and commitment over time in the context of growing hair longer. It implies the growth and changes experienced together, and cherishing this long-term companionship.