不小心闯进你的心不小心进了我的心
[bù xiăo xīn chuăng jìn nĭ de xīn bù xiăo xīn jìn le wŏ de xīn]
Translating as 'Carelessly Intruding Your Heart; Unexpectedly Enter Mine' - speaks to accidental romantic encounters resulting in mutual attraction leading to reciprocated feelings between two people