可遇不可求

kěyùbùkěqiú ㄎㄜˇ ㄩˋ ㄅㄨˋ ㄎㄜˇ ㄑㄧㄡˊ

    • can be discovered but not sought (idiom)
    • one can only come across such things serendipitously

Character by character

Sources