等闲之辈 ordinary person
Explanation
指资质平庸，能力普通的人。通常用于否定句，表示某人并非平凡之辈。
Refers to a person with ordinary qualifications and abilities. It is usually used in negative sentences to indicate that someone is not an ordinary person.
Origin Story
话说三国时期，诸葛亮在南征中，遇到了一支来势汹汹的敌军，军师们都有些担心。诸葛亮却淡定自若，说：“不必惊慌，此番来犯者，不过是一些等闲之辈。我已布下天罗地网，待他们自投罗网。”果然，敌军在诸葛亮的巧妙安排下，陷入重重包围，最终全军覆没。这场战役再次展现了诸葛亮卓越的军事才能，他不仅能运筹帷幄，决胜千里，更能识人辨势，一眼看穿敌军的虚实。那些所谓的“等闲之辈”终究无法与诸葛亮这样的智谋之士抗衡，最终只能成为他辉煌战绩的陪衬。
During the Three Kingdoms period, Zhuge Liang encountered a formidable enemy army during his southern campaign, causing some concern among his military strategists. However, Zhuge Liang remained calm and said, "There's no need for alarm. These invaders are mere commoners. I have already set a trap, waiting for them to fall into it." As predicted, the enemy army fell into a tight encirclement thanks to Zhuge Liang's skillful plan, ultimately leading to their complete defeat. This battle once again showcased Zhuge Liang's exceptional military talent. Not only could he strategize and achieve victories from afar, but he could also judge people's abilities and easily discern the enemy's strengths and weaknesses. Those so-called "commoners" were ultimately no match for a strategist like Zhuge Liang and only served as supporting players in his glorious victories.
Usage
多用于否定句，表示某人能力超群，并非等闲之辈。
Mostly used in negative sentences to indicate that someone has extraordinary abilities and is not an ordinary person.
Examples
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他并非等闲之辈，而是位经验丰富的工程师。
ta bing fei dengxian zhi bei, er shi wei jingyan fengfu de gongchengshi.
He is no ordinary person, but an experienced engineer.
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不要小看他，他可不是等闲之辈。
buyao xiaokan ta, ta ke bushi dengxian zhi bei
Don't underestimate him; he's no ordinary person.