Covers historical horse-drawn 'mail coaches' (the kind held up in Western films) and modern postal trucks. Related:
邮政车 'postal vehicle' (more formal),
邮政列车 (yóuzhèng lièchē) 'mail train',
邮局 (yóujú) 'post office'. The radical-bearing character
邮 contains
阝 'town', evoking the postal route between towns.
