彬 is a character commonly used in boys' names, implying refinement.
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彬彬有礼 (bīnbīn yǒulǐ) — polite and well-mannered — is the key idiom. 彬彬 is a reduplicated form meaning 'refined and elegant'. The character 彬 contains two 木 (tree) elements and 彡, suggesting graceful growth.