Xī'ān gǔ chéngqiáng yǒu sì gè dàmén, nánmén zuì yǒumíng.
The Xi'an city wall has four great gates, and the South Gate is the most famous.
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culture
Ancient Chinese cities were laid out on a cardinal grid with gates at each direction — 南门, 北门, 东门, 西门. The south gate (facing the sun) was traditionally the main ceremonial entrance. Today the pattern persists in campus and park layouts.