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What is the idiom "each has his own skills and methods"

When the Eight Immortals crossed the sea, they all showed their magical powers.

Pinyin bā xi ā n guò h m: I-gé xi m: n shé n t not ng.

According to legend, when the Eight Immortals crossed the sea, they didn't need a boat, and everyone had a set of spells. As there is a folk proverb "Eight Immortals Crossing the Sea, each displaying his magical powers", he later used metaphors to express his skills or methods and compete with each other.