China called on World Trade Organization members on Monday to unite to prevent the United States “wrecking” the WTO, and it urged them to oppose U.S. President Donald Trump’s tariffs targeting China’s alleged theft of intellectual property, Reuters reported.

Trump’s trade policy, labeled “medieval” by former WTO head Pascal Lamy, has inflamed international opinion this year.

While a U.S. veto on new WTO judges jams up legal disputes in Geneva, Trump has slapped tariffs on solar panels, cited national security to restrict steel and aluminum imports, and demanded that China slash $100 billion from its U.S. trade surplus.

China’s WTO ambassador Zhang Xiangchen said the latest U.S. move, linked to alleged theft of U.S. innovation, was fundamentally incompatible with the WTO.

“In the open sea, if the boat capsizes, no one is safe from drowning. We shouldn’t stay put watching someone wrecking the boat. The WTO is under siege and all of us should lock arms to defend it,” he told a WTO meeting.