Shàngjí de mìnglìng tā zhìruò wǎngwén, jìxù wǒxíngwǒsù.
He ignored orders from his superiors and continued doing things his own way.
Tips
memory
置 (place/treat as) + 若 (as if) + 罔 (not / without) + 闻 (to hear) = 'treat it as if not heard'. The character 罔 (wǎng) is classical for 'without / not', giving this idiom its literary feel.
