Describes a child who, despite their young age, is exceptionally clever, mischievous, and full of cunning ideas; precocious and often naughty.
这个孩子才五岁，但已经会自己想办法解决问题了，真是人小鬼大
This child is only five years old, but he can already figure out how to solve problems on his own; he's truly a 'small person, big imp'.
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