灿烂的笑容只因你而绽放只因你而绽放灿烂的笑容
[càn làn de xiào róng zhĭ yīn nĭ ér zhàn fàng zhĭ yīn nĭ ér zhàn fàng càn làn de xiào róng]
A heart-warming phrase meaning 'The bright smile blossoms only because of you, blooming only for your sake'. It expresses deep affection shown through one's joyful expression caused by love interest.