Grierson Reef

Grierson Reef (Pulo ng Julian Felipe); Sin Cowe East Island (Đảo Sinh Tồn Đông); Mandarin, is a cay on the eastern part of the Union Banks of the Spratly Islands in the South China Sea. The island has been occupied by Vietnam since 1978. It is also claimed by China (PRC), the Philippines, Vietnam, and Taiwan (ROC).