所有的深爱都是秘密所有的深情只因为你
[suŏ yŏu de shēn ài dōu shì mì mì suŏ yŏu de shēn qíng zhĭ yīn wéi nĭ]
This phrase means 'All deep love remains a secret; all deep emotions exist only because of you.' It conveys secrecy and strong, dedicated emotions toward a particular individual.