讽谏

fěngjiàn

[give advance to one's superior; remonstrate with ruler by clever analogy] 指下对上, 不直指其事, 而用委婉曲折的言语规劝, 使其改正错误

衡乃拟班固《两都》作《二京赋》, 因以讽谏。 --《后汉书·张衡传》