循規蹈矩 [ㄒㄩㄣˊ ㄍㄨㄟ ㄉㄠˇ ㄐㄩˇ; xun2 gui1 dao3 ju3] to follow the compass and go with the set square (idiom); to follow the rules inflexibly to act according to convention ◄ ►