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Jyutping dei6 haa6 dong2
Pinyin dì xià dǎng

Definitions (Wiktionary)
  1. name, historical
    clandestine Chinese Communist Party branch, usually responsible for intelligence gathering
Examples (Wiktionary)
  1. Mandarin
    地下党员
    地下黨員
    dì xià dǎng yuán
    • secret member of a political party; especially a CCP member