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Jyutping cung4 cyun4
Pinyin zhòng quán

Definitions (Wiktionary)
  1. noun, literary
    name of a kind of moss or lichen
  2. noun, figuratively, literary
    grave; the nether world; the Nine Springs
    (syn.) 九泉
  3. noun, figuratively, literary
    abyss
  4. noun, figuratively, literary
    deep layers of soil
  5. name, literary
    name of an ancient place