China sanctions former Philippine senator on maritime claims

China's claims in the South China Sea, a conduit for $3 trillion in annual ship-borne commerce, overlap with the exclusive economic zones of Brunei, Indonesia, Malaysia, the Philippines and Vietnam.

A 2016 ruling of an international arbitral tribunal voided Beijing's sweeping claims as having no basis in international law, a decision China rejects.

(Reporting by Joe Cash in Beijing and Mikhail Flores in Manila; Editing by Clarence Fernandez)