名不副实 undeserving of one's reputation
Explanation
名不副实的意思是名声或名义和实际不相符，指空有虚名，名不符其实。
The meaning of ming bu fu shi is that reputation or name does not match the reality, referring to empty fame, the name does not match the reality.
Origin Story
从前，有个村子里住着一位名叫李大壮的木匠，他技艺高超，做的家具结实耐用，远近闻名。然而，随着时间的推移，李大壮逐渐变得骄傲自满，开始偷工减料，用劣质木材制作家具。虽然他的名声依旧响亮，但做出的家具却越来越差，很快就名不副实了。村民们开始抱怨，李大壮的生意也一落千丈。最后，李大壮不得不重新学习技艺，诚实做人，才慢慢地赢回了人们的信任。
Once upon a time, there was a carpenter named Li Dazhuang who lived in a village. He was highly skilled, and his furniture was sturdy and durable, making him famous far and wide. However, as time went on, Li Dazhuang became proud and complacent, and began to cut corners, using inferior wood to make furniture. Although his reputation remained strong, the furniture he made became worse and worse, and soon it became undeserving of its reputation. Villagers began to complain, and Li Dazhuang's business plummeted. Finally, Li Dazhuang had to relearn his skills and be honest to slowly regain the trust of the people.
Usage
用于形容名声与实际不相符的情况。
Used to describe situations where reputation does not match reality.
Examples
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他虽然是有名的专家，但实际上名不副实。
ta suiran shi youming de zhuanjia, dan shiji shang ming bu fu shi
Although he is a famous expert, he is actually undeserving of his reputation.
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这家店的招牌菜名不副实，味道很一般。
zhemeidian de zhaopian cai ming bu fu shi, weidao hen yiban
This restaurant's signature dish is not up to its name, the taste is very ordinary.