另觅新欢
lìng​mì​xīn​huān

find new lover

另觅新欢 (另覓新歡) lìng​mì​xīn​huān
find new lover
to seek out a new romantic partner, typically after a previous relationship has ended or when moving on to someone new
have an affair
to seek happiness elsewhere as a euphemism for engaging in extramarital sex; to find a bit on the side

Sources
Definitions
CC-CEDICT