The Trump administration is preparing to judge imports not just by where they were made but by how much Chinese material, parts, or money is inside them — bad news for exporters in Taiwan and Southeast Asia that rely on Chinese inputs.

• Washington is stretching the definition of illegal transshipment beyond fake labels and paperwork to cover goods with heavy Chinese content.
• A White House report from Peter Navarro accused more than 40 countries of helping Chinese goods slip into the US and dodge tariffs.
• Vietnam's electronics industry, Malaysia's plastics makers, and Singapore's logistics hub were all named as routes for Chinese goods.
• US customs is tightening import paperwork and tracking, and may eventually trace raw materials back to their source.
• The end point could be a "purity test": even a legally made third-country product could be challenged if the Chinese share is too high, with Chinese investment or company ownership also in scope.

Outlook: Exporters face more US customs scrutiny and should expect to document their supply chains or seek advance origin rulings before shipping.