向日葵的微笑只属于太阳
[xiàng rì kuí de wēi xiào zhĭ shŭ yú tài yáng]
'The Sunflower's Smile Belongs Only to the Sun' beautifully expresses unconditional loyalty. It uses the sunflower which naturally follows the sun’s movement as a symbol, expressing adoration and fidelity specifically reserved for one special person or object.