ㄑㄧㄥㄔㄜㄕㄡˊㄌㄨˋqīngchē‑shóulù

轻车熟路
qīngchē‑shúlùㄑㄧㄥ ㄔㄜ ㄕㄨˊ ㄌㄨˋ
  1. 輕便熟悉比喻經驗豐富能力事情 旅行社工作護照不是輕車熟路」。

lit. to drive a lightweight chariot on a familiar road (idiom)​, fig. to do sth routinely and with ease, a walk in the park
Routinenangelegenheit (S, Sprichw)​