無心插柳柳成陰 [ㄨˊ ㄒㄧㄣ ㄔㄚ ㄌㄧㄡˇ ㄌㄧㄡˇ ㄔㄥˊ ㄧㄣ; wu2 xin1 cha1 liu3 liu3 cheng2 yin1]
 lit. idly poke a stick in the mud and it grows into a tree to shade you
 (fig.) unintentional actions may bring unexpected success
 also written 無心插柳柳成蔭

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