







马角乌头 is a Chinese idiom (chengyu) meaning “an utter impossibility”. Something that will never happen. Literally, “Horse horns, crow's white head”.
In the late Warring States period, the states of Qin and Yan outwardly maintained friendly relations, exchanging royal princes as hostages. Prince Dan of Yan was a hostage in Qin, and King Ying Zheng of Qin treated him with great disrespect and contempt.
Prince Dan requested permission from the Qin King to return to Yan. The King replied that he could only return when horses grew horns and crows turned white.
Prince Dan then escaped back to Yan and dispatched Jing Ke to assassinate the Qin King.

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Open the tool →马角乌头 (mǎ jiǎo wū tóu) is a Chinese idiom (chengyu) meaning “an utter impossibility”.
马角乌头 is pronounced mǎ jiǎo wū tóu in Mandarin Chinese.
Literally, 马角乌头 means “Horse horns, crow's white head”. It is used to mean “an utter impossibility”.
马角乌头 comes from a classical Chinese story dating back to ancient China. The full story is on this page.
乌鸦变白,马头生角。比喻不能实现之事。