Many chips undergo wafer fabrication in Taiwan, then are sent to Southeast Asia for assembly, testing, and back-end packaging (ATP), before being reported to the U.S. customs as exports from Malaysia or Vietnam. Customs statistics record the last exporting country, not the actual manufacturing origin. The U.S. International Trade Commission (USITC) 2023 study used supply chain traceability to correct this discrepancy, concluding that 44.2% of logic chips and 24.4% of memory chips imported by the U.S. are actually manufactured in Taiwan. Thus, apparent diversification of import sources does not mean reduced actual dependence; Taiwan's role in advanced chip supply remains indispensable. When foreign trade practitioners conduct supplier risk assessments, failing to trace manufacturing origin and relying only on customs records can seriously underestimate concentration risk.