Rènhé xùnsīwǎngfǎ de xíngwéi dōu huì shòudào chéngchǔ.
Any act of perverting the law for private interest will be punished.
Tips
register
Formal/legal register. Appears in court judgments, anti-corruption reports, and news about disciplined officials. In casual speech people just say 走后门 or 包庇.
grammar
Structure: 徇私 (to act for private reasons) + 枉法 (to twist the law). 徇 here means 'to comply with, to submit to' — not the 殉 (to die for) sometimes written in error.