他入她城毁我城她入他心毁我心
[tā rù tā chéng huĭ wŏ chéng tā rù tā xīn huĭ wŏ xīn]
This illustrates complex triangular heartbreak where two relationships are intertwined destructively—her involvement with him destroys both her city and the user’s city (figuratively), leading ultimately into mutual ruin through these connections impacting everyone adversely.