土崩瓦解 Landslide and tile disintegration
Explanation
比喻像土石崩塌，瓦片碎裂一样，彻底垮台，不可收拾。
A metaphor comparing a complete and unrecoverable collapse to the crumbling of earth and tiles.
Origin Story
话说商朝末年，商纣王昏庸无道，残暴不仁，民怨沸腾。他沉迷酒色，荒淫无度，不理朝政，重用奸臣，滥杀忠良。天下诸侯纷纷反抗，周武王乘机起兵讨伐商纣。经过牧野之战，商朝军队土崩瓦解，纣王自焚于鹿台，商朝灭亡。这场战争，就像泥土崩塌，瓦片粉碎一样，商朝的统治彻底崩溃，再也没有恢复的可能。这便是“土崩瓦解”的由来。
It is said that at the end of the Shang Dynasty, King Zhou was a cruel and incompetent ruler who angered the people. He indulged in debauchery and ignored state affairs. He used unscrupulous advisors and killed many loyal subordinates. The princes rebelled and King Wu of Zhou took the opportunity to go to war. After the Battle of Muye, the Shang army collapsed and King Zhou burned himself in Lutai City. The Shang Dynasty was destroyed. This war was like the collapse of earth and tiles, the rule of the Shang Dynasty completely collapsed and never recovered. This is the origin of "Tǔ bēng wǎ jiě".
Usage
形容事物彻底崩溃，不可收拾的状态。
Describes the state of a complete collapse that is beyond repair.
Examples
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商朝末年，商纣王的统治就像土崩瓦解一样迅速垮台。
Shāng cháo mò nián, shāng zhòu wáng de tǒngzhì jiù xiàng tǔ bēng wǎ jiě yīyàng xùn sù kuǎ tái.
At the end of the Shang Dynasty, the rule of King Zhou collapsed as quickly as a landslide.
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面对强敌的进攻，他们的防线土崩瓦解，溃不成军。
Miàn duì qiáng dí de jīngōng, tāmen de fángxiàn tǔ bēng wǎ jiě, kuì bù chéng jūn。
Faced with the enemy's attack, their defense lines collapsed and they were defeated.