The Trump administration on Thursday released a sharply worded report accusing Chinese exporters of orchestrating a system of “illegal transshipment” through more than 40 third countries to dodge US tariffs, branding the practice “The Great Transshipment Scam.” The 25-page document claims Chinese firms have systematically diverted goods through lower-tariff jurisdictions since the US kicked off its trade war with China in 2018. It alleges that exporters use limited assembly, relabelling,...