A memorial plaque signed by Taiwan President Ma Ying-jeou, which is engraved with the words, "Peace in the South China Sea and our national territory secure forever", is seen in Itu Aba, which the Taiwanese call Taiping, South China Sea,Taiwan March 23, 2016. REUTERS/Fabian Hamacher/File Photo

A memorial plaque signed by Taiwan President Ma Ying-jeou, which is engraved with the words, “Peace in the South China Sea and our national territory secure forever”, is seen in Itu Aba, which the Taiwanese call Taiping, South China Sea,Taiwan March 23, 2016. REUTERS/Fabian Hamacher/File Photo

A memorial plaque signed by Taiwan President Ma Ying-jeou, which is engraved with the words, "Peace in the South China Sea and our national territory secure forever", is seen in Itu Aba, which the Taiwanese call Taiping, South China Sea,Taiwan March 23, 2016. REUTERS/Fabian Hamacher/File Photo

May 13, 2016 6:25 AM (UTC+8)