Facing flak from the US, Japan and others over its arrerstive maritime policy in the contested waters, Deputy Chief of the People's Liberation Army (PLA) Wang Guanzhong said China historically had sovereignty over the South China Sea.
He was addressing the last day of the annual Shangri-La Dialogue in Singapore.
Though China is a signatory of the United Nations Convention on the Law of the Sea (UNCLOS) and fully respects it, the 1982 treaty cannot be retrospectively applicable to China which had controlled the area for over 2000 years, state-run CCTV reported.
Vietnam, Philippines, Malaysia, Brunei along with Taiwan strongly contest China's claims over the South China Sea.
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US has said it backs their demand for settlement of the dispute without taking a position on the claims and counter- claims.
"The UNCLOS is not suited to determining the ownership of islands and reefs. Maritime law is a vast and rich legal system that includes more than just the United Nations Convention", Wang said.
In addition, maritime law is not the only standard for adjusting rights of different countries, he said adding that it is incorrect to depend only on UNCLOS.
Signed in 1982, the UNCLOS defines the rights and responsibilities of nations in their use of the world's oceans, establishing guidelines for businesses, the environment, and the management of marine natural resources.