ㄖㄨˋㄐㄧㄥˋㄙㄨㄟˊㄙㄨˊrùjìng‑suísú

入境随俗
  1. 一個地方當地風俗行事 只有入境隨俗尊重當地風俗習慣才能人和相處」。

When you enter a country, follow the local customs (idiom)​; do as the natives do, When in Rome, do as the Romans do