wú​xīn​chā​liǔ​liǔ​chéng​yìn

unintentional success

Senses

无心插柳柳成荫/ 無心插柳柳成蔭 wú​xīn​chā​liǔ​liǔ​chéng​yìn unintentional success

an unintentional action that leads to an unexpected positive result; literally meaning 'planting a willow branch without intent and seeing it grow into a shade tree'

References

variant 无心插柳柳成阴/無心插柳柳成陰 无心插柳柳成荫/無心插柳柳成蔭