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.

Its new deal with Vietnam and its fresh tariff threats issued to many other countries seem designed to reduce China’s role in their supply chain. Countries that had hoped to stay out of the new cold war now fear they are being forced to pick a side. To appease the world’s biggest market, they must anger the world’s biggest trader.

China's government newspaper has said that Beijing will retaliate if President Trump restores huge tariffs on its goods.

The notices bring the total number of countries Trump has hiked tariffs on this week to 20. Higher rates on countries will take effect on August 1.

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 cranked up the pressure Monday on America’s trading partners, firing off letters to heads of several countries, informing them of their new tariff rate. But at the same time, Trump took some of the edge off by signing an executive action Monday to extend the date for all “reciprocal” tariffs,