Большой китайско-русский словарь
mìyùn
Dating seriously. Literally “honey luck.” When a man and woman are in a relationship likely headed toward marriage, young people might say that they are in mìyùn, or struck by “honey luck.” The term is a play on the word “honeymoon,” 蜜月 mìyuè (mee yreh), because they sound similar.