tóng jū guān xì

to have a cohabiting relationship

In Chinese, the term '同居关系' refers to a living arrangement where two people, typically in a romantic relationship, share a home and live together without being legally married. This term can reflect various degrees of commitment, but it generally implies a serious relationship that goes beyond casual dating. It is increasingly common in modern Chinese society to see young couples enter into such relationships as they prioritize personal and financial independence.