守候花开花落相爱天长地久
[shŏu hòu huā kāi huā luò xiāng ài tiān zhăng dì jiŭ]
It translates to 'Guarding blossoms bloom and fall, love lasting forever'. It reflects a romantic view on life, signifying loyalty and commitment in relationships, watching time pass and nature change while maintaining long-lasting feelings for a loved one.