入境問俗 [ㄖㄨˋ ㄐㄧㄥˋ ㄨㄣˋ ㄙㄨˊ; ru4 jing4 wen4 su2] When you enter a country, enquire about the local customs (idiom); do as the natives do When in Rome, do as the Romans do ◄ ►