English Original
During the Three Kingdoms period (220-280 AD), Cao Rui, the emperor of the Wei state, sought to recruit a truly capable official. He advised his ministers: 'When selecting talent, always beware of those with a false reputation. A false reputation is like a picture of a cake; it cannot relieve hunger.'
This idiom later evolved to describe the act of comforting oneself with unrealistic thoughts or illusions, without addressing practical problems.
中文翻译
三国时期（公元220-280年），魏明帝曹叡想选拔一位真正有才能的官员。他对大臣们说：“选拔人才时，务必警惕那些徒有虚名的人。虚名就像画出来的饼，是无法解除饥饿的。”
后来，这个成语演变为用来形容用不切实际的幻想来安慰自己，而不去解决实际问题的行为。