China warned the Trump administration on Tuesday against reigniting trade tension by restoring tariffs on its goods next month, and threatened to retaliate against nations that strike deals with the United States to cut China out of supply chains.

China expressed opposition to nearby countries striking tariff reduction deals that cut China out of the supply chain. The People’s Daily, in its commentary, called it a “typical act of unilateral bullying, which seriously disrupts the normal international trade order and must be firmly opposed.”

The letters listed a range of tariffs. Goods entering the U.S. from Japan, South Korea, Malaysia, Kazakhstan, and Tunisia will be subject to a 25 percent levy. There will be a 30 percent levy on South African and Bosnian goods, while imports from Indonesia will be subject to a 32 percent rate.

President Donald Trump has threatened steep tariffs on America’s trading partners, sending letters to more than a dozen world leaders, warning they have less than a month to strike a deal.