大相径庭 diametrically opposed
Explanation
比喻彼此的意见、看法或情况相差很远，大不相同。
It describes disagreements or different situations that are very different from each other.
Origin Story
春秋时期，楚国有一个狂士名叫接舆，他四处游历，有一天他遇到了一个名叫肩吾的人。接舆对肩吾说，在遥远的北海，有一座神奇的姑射山，山上有位神仙，能够让天下五谷丰登，国泰民安。肩吾听后，觉得接舆说的这件事太荒诞不经了，与常理大相径庭，根本不可能发生，于是便对连叔说接舆是在说大话，吹牛。连叔沉思了一会，意味深长地说："接舆的话虽然听起来不可思议，但也不能完全否定，或许其中隐藏着某种深刻的道理。" 这则故事告诉我们，看待问题不能过于固执，要多角度思考，说不定在看似荒谬的言论中，也蕴藏着智慧的火花。
During the Spring and Autumn period, there was an eccentric scholar named Jieyu in the state of Chu. He travelled around, and one day, he met a man named Jianwu. Jieyu told Jianwu that in the distant North Sea, there was a magical Mount Gush, on which lived a god who could bring the world abundant harvests and peace. Jianwu listened and thought that what Jieyu had said was too absurd and deviated greatly from common sense, impossible to happen, so he told Lian Shu that Jieyu was boasting. Lian Shu pondered for a while and said meaningfully: "Although what Jieyu says sounds unbelievable, it can't be entirely denied, perhaps there is some profound truth hidden in it." This story tells us that we shouldn't be too stubborn when looking at problems, we should think from multiple perspectives, maybe in seemingly absurd statements, there is also a spark of wisdom.
Usage
形容意见、看法或情况相差很远，大不相同。
Describes disagreements, opinions, or situations that are very different from each other.
Examples
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他们的意见大相径庭，根本无法统一。
tamende yijian da xiang jingting,genben wufa tongyi.
Their opinions are diametrically opposed, and it's impossible to reach a consensus.
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这两个方案大相径庭，需要重新考虑。
zhe liangge fang'an da xiang jingting,xuyao chongxin kaolv
These two plans are vastly different and need to be reconsidered.