Analysis of information sources in references of the Wikipedia article "Территориальные споры в Южно-Китайском море" in Russian language version.
Unlike Beijing, however, Taipei uses the original eleven dashes, since the other two dashes in the Gulf of Tonkin were only removed under the approval of Premier Zhou Enlai in 1953, four years after the establishment of the PRC. Li Jinming and Li Dexia, 'The Dotted Line on the Chinese Map of the South China Sea: A Note'.