This concept emphasizes that the writing techniques, the meaning of the objects and the sentiment of the work should be highly compatible and integrated. If there is only technique without a rich and beautiful meaning, it is not clever; if there is only meaning without suitable technique to express it, it is not rich and beautiful either. The first part of the phrase was first used by Liu Xie (465?-520? or 532?) of the Southern Dynasties to praise the work of Qu Yuan (340?-278? BC). Now it is extended to refer to the artistic realm of high purity and fragrance in literary works. The term bilei yuyi (比类寓意) refers to the use of analogies, metaphors and symbolism to describe the appearance of unknown things by using the similarities and differences of familiar things to inspire the reader’s imagination.