越中 is a literary name for the core territory of the ancient
越国 (Yuè Kingdom), centered on today's
绍兴 (Shàoxīng) in Zhejiang. It appears in Tang poetry most famously in
李白's 《
越中览古》: "
越王勾践破吴归,
义士还家尽锦衣" — the poem meditates on King Goujian's victory over Wu, and the eventual decay of his palace.