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During the Jin Dynasty, Yu Zhongchu composed "Ode to Yangdu" and presented it to Yu Liang. Yu Liang highly praised its value, claiming it could rival Zhang Heng's "Ode to the Two Capitals" and Zuo Si's "Ode to the Three Capitals." Consequently, everyone competed to copy it.
However, Grand Tutor Xie An thought the praise was excessive, stating that this was "building a house under a house" (屋下架屋), as the work merely imitated others everywhere, making its content utterly bland.

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Open the tool →屋下架屋 (wū xià jià wū) is a Chinese idiom (chengyu) meaning “to create redundant structures or content”.
屋下架屋 is pronounced wū xià jià wū in Mandarin Chinese.
Literally, 屋下架屋 means “Build a house under a house”. It is used to mean “to create redundant structures or content”.
屋下架屋 comes from a classical Chinese story dating back to ancient China. The full story is on this page.
比喻机构或文章结构重叠。