驴唇不对马嘴(lǘ chún bú duì mǎ zuǐ)

驴唇不对马嘴(lǘ chún bú duì mǎ zuǐ)

English Translation: “A donkey’s lips do not match a horse’s mouth.”

Meaning:
This is similar to the English expression “a square peg cannot fit into a round hole.” It refers to something that doesn’t fit or is irrelevant.

Example:
他的回答完全没有解决问题，简直是驴唇不对马嘴。
(His answer didn’t solve the problem at all. It was really “a donkey’s lips not matching a horse’s mouth.”)

Source: Hello Mandarin