循规蹈矩

循规蹈矩	xún guī dǎo jǔ	to follow the compass and go with the set square (idiom); to follow the rules inflexibly / to act according to convention
循	xún	to follow / to adhere to / to abide by
规	guī	variant of 规
规	guī	compass / a rule / regulation / to admonish / to plan / to scheme
蹈	dǎo	to tread on / to trample / to stamp / to fulfill / Taiwan pr. [dao4]
矩	jǔ	variant of 矩
矩	jǔ	carpenter's square / rule / regulation / pattern / to carve