At the heart of Trump’s latest trade deal with Vietnam and talks with other trading partners is an effort to counter what he sees as China’s unfair practices to circumvent U.S. tariffs.

The US trade agreement with Vietnam reportedly lowers tariffs but lacks detail, triggering sharp warnings from Chinese officials.

With the dust far from having settled on this week’s US-Vietnam trade agreement, one thing is clear: companies operating in what’s become one of the most vibrant Asian economies are on notice to move up the value chain.