文质彬彬 Well-mannered and cultured
Explanation
文质彬彬，形容人既文雅又朴实，后形容人文雅有礼貌。
文质彬彬 describes a person who is both cultured and unpretentious, later used to describe someone who is cultured and polite.
Origin Story
唐朝时期，有一位名叫李白的诗人，他从小就聪明好学，文采过人。长大后，他游历四方，结交了许多朋友。李白为人风度翩翩，文质彬彬，他的诗歌也写得很好，因此深受人们的喜爱。
During the Tang Dynasty, there was a poet named Li Bai, who was very intelligent and eager to learn from a young age, and he had an extraordinary talent for poetry. After he grew up, he traveled around the world and made many friends. Li Bai was an elegant and well-mannered man, and his poems were also very well-written, so he was deeply loved by people.
Usage
形容人举止文雅，谈吐不俗，有礼貌。例如：他文质彬彬，说话做事都很有分寸。
Describes a person who is polite and well-mannered, and their words and actions are appropriate. For example: He is well-mannered and cultured, and he speaks and acts with discretion.
Examples
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他为人文质彬彬，说话做事都很有分寸。
ta wei ren wen zhi bin bin, shuo hua zuo shi dou hen you fen cun.
He is a well-mannered and cultured person.
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这位教授文质彬彬，谈吐优雅，很有学者风范。
zhe wei jiao shou wen zhi bin bin, tan tu you ya, hen you xue zhe feng fan
This professor is a well-mannered and elegant gentleman, with the air of a scholar.