半糖夫妻
bàn​táng​fū​qī

sugar relationship

半糖夫妻 bàn​táng​fū​qī
sugar relationship
a romantic relationship involving financial support, typically from a sugar daddy
weekend marriage
a lifestyle where a married couple lives apart during the workweek and reunites on weekends to maintain independence and relationship freshness

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Definitions
CC-CEDICT