The United States opened a $256 million de facto embassy in Taipei, Taiwan, on Tuesday amid rising trade tensions with China, Reuters reported.

Kin Moy, director of the American Institute of Taiwan (AIT), told the news agency that the embassy will be used as a representative office later this summer.

Marie Royce, U.S. Assistant Secretary of State for Educational and Cultural Affairs, said that the opening of the new complex represented the strengthening of diplomatic ties between the U.S. and Taiwan, which have been nearly nonexistent since 1979.

“We have faced many trials along this journey, but we have risen to the challenge at every turn, knowing that our shared commitment to democracy would see us through,” Royce said at the ceremony, according to Reuters.

While the opening of the de facto embassy may have strengthened diplomatic ties with Taiwan, it has further strained already weakening diplomatic ties between the U.S. and China.

“We urge the United States to scrupulously abide by its promises to China over the Taiwan issue, correct their wrong actions, and avoid damaging China-U.S. relations and peace and stability in the Taiwan Strait,” Chinese ministry spokesman Geng Shuang told reporters.

President Donald Trump’s administration has cracked down on Chinese trade over the last few months, with the two countries threatening to place multi-billion dollar tariffs on one another.

Last month, Trump announced that the U.S. would place 25 percent tariffs on $50 billion worth of Chinese goods and place broad investment restrictions on Chinese investments in “industrially significant” American technology.

The administration also announced that it would continue to pursue its World Trade Organization case against China’s “discriminatory practices for licensing intellectual property.”

In April, China said it would place equal retaliatory tariffs on the U.S. after Trump imposed on the nation meant to punish China for what the president viewed as unfair trade practices.