意气用事 acting rashly
Explanation
意气用事指凭一时冲动，不顾后果地行事。
Acting rashly means acting on impulse without considering the consequences.
Origin Story
从前，有个年轻气盛的书生，名叫李文才。一日，他与人争执，一时意气用事，拔剑相向。幸好旁人及时劝阻，才避免了一场血案。事后，李文才后悔莫及，深感自己鲁莽冲动。他从此痛改前非，认真学习，最终成为一位德才兼备的官员，告诫世人要谨慎处事，不可意气用事。
Once upon a time, there was a young and impetuous scholar named Li Wencai. One day, he got into an argument and, acting on impulse, drew his sword. Fortunately, others intervened in time, preventing a bloody incident. Afterwards, Li Wencai deeply regretted his rash actions, realizing his impulsiveness. He then changed for the better, studied hard, and eventually became a virtuous and capable official, warning others to be cautious and avoid acting out of anger.
Usage
形容人做事鲁莽冲动，不加思考。
Used to describe someone who acts rashly and impulsively without thinking.
Examples
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他总是意气用事，不顾后果。
ta zongshi yiqiyongshi,buguguohouguo.
He always acts rashly without considering the consequences.
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年轻人容易意气用事，需要多加磨练。
qingnianren rongyi yiqiyongshi,xuyaoduojiamolian
Young people are prone to acting on impulse and need more experience