溫故而知新

Simplified: 温故而知新

wēngù'érzhīxīn ㄨㄣ ㄍㄨˋ ㄦˊ ㄓ ㄒㄧㄣ

    • to review the old and know the new (idiom, from the Analects)
    • to recall the past to understand the future

Character by character

Sources