我爱你只不过是嘴唇运动
[wŏ ài nĭ zhĭ bù guò shì zuĭ chún yùn dòng]
I 'love you' is only lip service, implying that saying 'I love you' isn’t always indicative of genuine emotions; sometimes it is just hollow words. It questions the sincerity behind the words 'I love you'.