Written as a conversation among three people, in poking fun at the nobility and the emperor who spent all day hunting rather than in affairs of state, it also depicted a vast and colorful world: Sima exhausted his imagination to describe natural wonders, strange creatures and bizarre plants, presenting a dazzling and awesome spectacle.
且看司馬相如的〈子虛賦〉，借著三個人的對話，規諷諸侯、天子鎮日游獵，不務正事。其中僅描寫雲夢裡的一座山就不下於千言，所謂：雲夢者方九百里，其中有山焉。其山則盤紆茀鬱，隆崇崒，岑崟參差，日月蔽虧。