我的城你就是我的王我的城你就是我的妃
[wŏ de chéng nĭ jiù shì wŏ de wáng wŏ de chéng nĭ jiù shì wŏ de fēi]
This refers to one's romantic world ('city'), where their loved one reigns as the king if they are a man, or queen/royal consort if they are female. It emphasizes deep mutual commitment within intimate and exclusive relationships between two people.