ㄒㄩㄣˊㄍㄨㄟㄉㄠˋㄐㄩˇxúnguī‑dàojǔ

循规蹈矩
xúnguī‑dǎojǔㄒㄩㄣˊ ㄍㄨㄟ ㄉㄠˇ ㄐㄩˇ
  1. 遵守禮法行事規矩蹈規循矩」、蹈矩循規」。 我們循規蹈矩國民」。

to follow the compass and go with the set square (idiom)​; to follow the rules inflexibly, to act according to convention