一丝不苟

not one thread loose (idiom); strictly according to the rules / meticulous / not one hair out of place

one / single / a (article) / as soon as / entire; whole; all; throughout / "one" radical in Chinese characters (Kangxi radical 1) / also pr. [yao1] for greater clarity when spelling out numbers digit by digit

silk / thread / trace / (cuisine) shreds or julienne strips / CL:條|条[tiao2] / classifier: a thread (of cloud, smoke etc), a bit, an iota, a hint (of sth) etc

no; not so / (bound form) not; un-

not lax / not casual / careful / conscientious

surname Gou

if / supposing / careless / negligent / temporarily