The word 杜撰 literally means “Du's writing” or “composed by Du.” This is a classical allusion (典故, diǎngù) referring to Du Mo (杜默), a scholar from the Song Dynasty. He was known for writing poetry that completely disregarded the strict rules of meter and rhyme. His contemporaries criticized his work as being so unstructured that it seemed he was just making it up on the spot. Thus, his name became synonymous with creating things that lack a proper foundation or basis in fact.
The origin of 杜撰 (dùzhuàn) is deeply rooted in China's rich literary history and the high value placed on form, tradition, and factual basis in writing (especially in poetry and historical records). The story of Du Mo serves as a cautionary tale: creation without foundation is not creation at all, but baseless fabrication. A good Western comparison is the phrase “to spin a yarn,” which also means to tell a long, elaborate, and often fictional story. However, “spinning a yarn” can sometimes have a whimsical or harmless connotation, like a grandfather telling a tall tale to his grandchildren. 杜撰, on the other hand, is almost always critical and negative. It implies a deliberate attempt to mislead by presenting something completely unfounded as legitimate. It points to a lack of credibility and intellectual laziness or dishonesty, directly challenging the Confucian value of integrity (诚, chéng).
杜撰 is used in both formal and informal contexts to call out information as being completely made up. It's a strong accusation.
Its connotation is consistently negative, implying that the creator of the information is either foolish, deceitful, or both.