Gǔ jiànzhù de wūjǐ shàng cháng yǒu zǒushòu zhuāngshì.
The ridges of ancient buildings are often decorated with mythical beasts.
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memory
脊 (jǐ) is also the word for spine/backbone - the ridge runs along the 'spine' of the roof. The set phrase 世界屋脊 (shìjiè wūjǐ, 'roof of the world') is the standard Chinese epithet for the Tibetan Plateau.