MANILA: Philippine president-elect Ferdinand Marcos Jr said Thursday he would uphold an international ruling against Beijing over the disputed South China Sea, insisting he would not let China trample on Manila’s maritime rights.

China claims almost all of the resource-rich waterway, through which trillions of dollars in trade passes annually, with competing claims from the Philippines, Brunei, Malaysia, Taiwan and Vietnam.

Beijing has ignored a 2016 decision by The Hague-based Permanent Court of Arbitration that declared its historical claim to be without basis.

Outgoing President Rodrigo Duterte fostered warmer ties with his more powerful neighbor by setting aside the ruling in exchange for promises of trade and investment, which critics said have not materialized.

In his strongest comments yet on the long-standing source of tensions between the two nations, Marcos said he would not “allow a single millimeter of our maritime coastal rights to be trampled upon”.

“We have a very important ruling in our favor and we will use it to continue to assert our territorial rights. It is not a claim. It is already our territorial right,” Marcos told selected local media.

“We’re talking about China. We talk to China consistently with a firm voice,” he said.

But he added: “We cannot go to war with them. That’s the last thing we need right now.”

‘Friends with everyone’

Marcos, popularly known as Bongbong, secured more than half of the votes in the May 9 election to win the presidency by a wide margin and cap a remarkable comeback for his family.

His father and namesake ruled the Philippines for 20 years, presiding over widespread corruption and human rights abuses before he was ousted in 1986.

Marcos Jr formally takes office on June 30.

He and his running mate Sara Duterte, who also won the vice presidential race in a landslide, have embraced key policies of the elder Duterte.

But Marcos signaled on foreign policy he would not adopt the “slightly unorthodox approach” of Duterte, who rattled diplomats with his firebrand rhetoric and mercurial nature.

Marcos indicated he would seek to strike a balance between China and the United States, which are vying to have the closest ties with his administration.

“We are a small player among very large giants in geopolitics. We have to ply our own way,” said Marcos.

“I do not subscribe to the old thinking of the Cold War where we had this spheres of influence where you’re under the Soviet Union or you’re under the United States,” he said.

“I think that we have to find an independent foreign policy where we are friends with everyone. It’s the only way.”

The United States has a complex relationship with the Philippines — and the Marcos family.

After ruling the former US colony for two decades with the support of the United States, which saw him as a Cold War ally, Marcos senior went into exile in Hawaii in the face of mass protests and with the nudging of Washington in 1986.

As regional tensions remain high, Washington is keen to preserve its security alliance with Manila that includes a mutual defense treaty and permission for the US military to store defense equipment and supplies on several Philippine bases.

The South China Sea was a key obstacle in Manila’s ties with Beijing and needed to be resolved, said Chester Cabalza of the Manila-based think tank International Development and Security Cooperation.

“If there will be no move coming from Marcos Jr and (Chinese President) Xi Jinping, the more Beijing will have an upper hand in terms of our strategic relations with China,” he said.