First used in “A Letter of Response to Li Yi” by Han Yu (768-824), this concept means that when a writer is virtuous and well-educated, his work will be rich in content and have a powerful message with the use of appropriate language and expressions. To make writings expressive, harmoniously rhymed and inspirational, their authors should have a lofty character, Han Yu aimed to learn the ancient thoughts by gaining a full understanding of ancient texts. He believed that a strong inner aspiration and a noble character are as important as linguistic expression. If one has moral integrity and is free from distraction, well-educated, passionate,and has an active mind, then he can use all his knowledge, life experience and creative experience to write good articles, But this does not mean that Han Yu ignored the form of language. Appropriate language requires mastery of the rules and techniques of writing. He emphasizes, however, that writing should deliver a good message. Good self-cultivation creates an appropriate and natural form of linguistic expression, thus enhancing the writing’s appeal.