心跳停在分手一差那
[xīn tiào tíng zài fēn shŏu yī chā nèi]
'Xin tiao ting zai fen shou yi cha na' translates as 'Heartbeat Stopped at That Very Moment We Broke Up'. This implies that breaking up brought about such intense emotions as if stopping her heartbeat momentarily, revealing emotional scars left by the breakup.