蟪 ㄏㄨㄟ ˋ huì 蛄 ㄍㄨ gū 不 ㄅㄨ ˋ bù 知 ㄓ zhī 春 ㄔㄨㄣ chūn 秋 ㄑㄧㄡ qiū lit. short-lived cicada does not know the seasons; fig. to see only a small piece of the big picture