ㄏㄨˋㄊㄨㄥtōngㄧㄡˇyǒuˊ

  1. 相互交換滿足各自需要我們彼此互通有無合作一定愉快。」

mutual exchange of assistance (idiom)​, to benefit from each other's strengths and make up each other's shortfalls, to reciprocate with material assistance, scratch each other's back