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Jyutping ngau4 aak1 ziu1
Pinyin niú è jiāo

Definitions (Wiktionary)
  1. name
    Whitsun Reef (a reef at the northeast extreme limit of the Union Banks in the Spratly Islands of the South China Sea)

牛軛礁 [-轭-]

Jyutping
Pinyin niú è jiāo

Definitions (CC-CEDICT)
  1. Niu'e Reef, disputed territory in the South China Sea, claimed by China, Vietnam and the Philippines, aka Whitsun Reef or Julian Felipe Reef