The U.S’s de facto embassy in Taiwan has reopened after a multi-million dollar renovation.

During the unveiling ceremony at the American Institute of Taiwan on June 12, U.S. officials said Washington is committed to a relationship with Taiwan.

Taiwanese President Tsai Ing-wen, who was also at the ceremony, said Taiwan is committed as well.

U.S. ambassador James Moriarty and U.S. Assistant Secretary of State for Educational and Cultural Affairs Marie Royce described the new office as a symbol of “strength and vibrancy of the U.S.-Taiwan partnership.”

Meanwhile, the new $256 million building has put a wedge between the U.S. and China relations.

Within hours of the unveiling, China reportedly lodged a complaint with Washington.

China sees Taiwan as part of its territory and has expressed upset before over the U.S. supporting Taiwan.