Metro Manila (CNN Philippines) — Activists demanded China’s withdrawal from the West Philippine Sea, calling for a “CHexit” or “Chinese exit,” from Philippine waters on Monday on the eve of a ruling by the Permanent Court of Arbitration on the maritime dispute between Manila and Beijing.

Protesting China’s island-building and other incursions in the West Philippine Sea, about a dozen members of the Bagong Alyansan Makabayan (BAYAN) picketed the Chinese Consulate in Makati City.

BAYAN accused China of bullying Filipino fishermen and destroying the environment through its reclamation activities in the Spratlys. The group said it was the proper move to bring China to the arbitral tribunal for violating the U.N. Convention on the Law of the Sea.

The court will announce its decision on Tuesday, more than three years after the Philippines filed the case to dispute China’s claims to virtually all of the South China Sea, including most of the Philippines’ exclusive economic zone in the region.

"Nababahala tayo kasi sa paghayag ng Tsina na hindi nila kinikilala yung jurisdiction ng Permanent Court of Arbitration," said BAYAN leader Mong Palatino.

[Translation: "We are concerned about the statements by China that it doesn’t recognize the jurisdiction of the Permanent Court of Arbitration."]

BAYAN said it will hold a larger demonstration in time for the tribunal’s ruling on Tuesday.

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Whatever the Tribunal's decision may be, BAYAN said it will continue to defend the country’s rights to the disputed waters. The group is calling other countries, especially the Philippines’ neighbors in Southeast Asia, to support Manila and pressure Beijing to respect other countries’ maritime rights.

"Tuloy-tuloy lamang po ang protesta hangga't hindi umaalis ang Tsina sa territorial waters ng Pilipinas, hangga't hindi kinikilala ng Tsina yung karapatan ng Pilipinas dito po sa ating territorial waters, at hangga't hindi tinatanggal ng Tsina yung kanyang illegal facilities at saka mga encroachment activities sa West Philippine Sea," Palatino said.

[Translation: "The protest will continue until China leaves Philippine territorial waters, until China recognizes the rights of the Philippines in our territorial waters, and until China has dismantled its illegal facilities and stops its encroachment activities in the West Philippine Sea."]