TAIPEI: Taiwan President Ma Ying-jeou’s planned trip to the Taiwanese-held island of Itu Aba in the disputed South China Sea is “extremely unhelpful” and won’t do anything to resolve disputes over the waterway, a US official said on Wednesday.

Ma’s office earlier announced that the president, who steps down in May, would fly to Itu Aba on Thursday to offer Chinese New Year wishes to residents on the island, mainly Taiwanese coast guard personnel and environmental scholars.

But Ma’s one-day visit to Itu Aba, known as Taiping in Taiwan, comes amid growing international concern over rising tensions in the waterway and quickly drew the ire of the American Institute in Taiwan (AIT), the de facto US Embassy in Taipei in the absence of formal diplomatic ties.

“We are disappointed that President Ma Ying-jeou plans to travel to Taiping Island,” AIT spokeswoman Sonia Urbom said in an e-mail to Reuters.

“Such an action is extremely unhelpful and does not contribute to the peaceful resolution of disputes in the South China Sea.”

The United States wanted Taiwan and all claimants to lower tensions, rather than taking actions that could raise them, Urbom added.

On a visit to Beijing on Wednesday, US Secretary of State John Kerry said Washington and Beijing needed to find a way to ease tensions in the South China Sea, through which $5 trillion in ship-borne trade passes every year.

“We talked about the possibility of a diplomatic way forward and Foreign Minister Wang Yi accepted the idea that it would be worth exploring whether or not there was a way to reduce the tensions and solve some of the challenges through diplomacy,” Kerry said.

Meanwhile, Taiwan Navy conducted security drill on Wednesday in the waters off Kaohsiung.

Both Taiwan and China claim most of the South China Sea. Vietnam, the Philippines, Malaysia and Brunei also have competing claims. Vietnam’s most senior official in Taiwan said Hanoi “resolutely opposes” Ma’s planned visit.

Itu Aba lies in the Spratly archipelago, where China’s rapid construction of seven man-made islands has drawn alarm across parts of Asia and been heavily criticized by Washington.

Taiwan has just finished a $100 million port upgrade and built a new lighthouse on Itu Aba, which has its own airstrip, a hospital and fresh water.