‘云云’ (yún yún) is a classical and literary expression meaning ‘etc.’, ‘and so on’, or ‘and the like’. Though composed of two identical characters—both meaning ‘cloud’—its usage has no connection to weather or nature; instead, it functions as a fixed, reduplicated phrase borrowed from classical Chinese texts, where it originally conveyed vagueness or non-specific enumeration. Today, it appears mainly in written Chinese, formal speeches, or humorous/ironic contexts to suggest a list is long, obvious, or not worth spelling out in full.

It typically follows a partial list (often two or three items), signaling that similar items continue beyond those named. Unlike colloquial alternatives like ‘等等’ (děng děng), ‘云云’ carries a slightly elevated, sometimes wry or dismissive tone—implying the omitted items are predictable, trivial, or self-evident. It’s rarely used in casual conversation but appears often in news reports, academic writing, and satirical commentary.