成法

kè shǒu zǔ zong de chéng fǎ

恪守祖宗的成法

abide by the rules established by one's ancestors

tā kè shǒu chéng fǎ

他恪守成法。

He adheres to set rules.

jīng jì gǎi gé wú chéng fǎ kě xún yào yīn shí yīn dì zhì yí

经济改革无成法可循，要因时因地制宜。

Since there are no established methods, it is imperative to reform the economy according to the actual situation.