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Johnson South Reef

Johnson South Reef, also known as Chigua (Chih-kua) Reef (Chinese: 赤瓜礁; pinyin: Chìguā Jiāo; Wade–Giles: Chih-kua chiao), Gạc Ma Reef (Vietnamese: Đá Gạc Ma), or Mabini Reef (Filipino: Bahura ng Mabini, lit.'Reef of Mabini'), is a reef in the southwest portion of the Union Banks in the Spratly Islands of the South China Sea.

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