Vietnam’s real trade test lies beyond Trump’s tariffs

As US President Donald Trump heads to Manila for the ASEAN Summit, then on to Shenzhen to meet Chinese leader Xi Jinping at APEC, Southeast Asian exporters are watching every tariff signal. They should be watching their own factory floors just as closely. With a temporary US-China tariff truce set to expire January 10, the back-to-back summits have regional manufacturers on edge. As Samady Ou wrote recently in Asia Times, a year of US tariffs and separate bilateral deals already risks dividing ASEAN and rattling regional supply chains. Shenzhen could pull the region’s exporters in either direction. A Trump-Xi deal lowering US tariffs on Chinese goods could steady regional component flows and demand while narrowing Southeast Asia’s “China plus one” tariff advantage. Renewed friction could intensify US scrutiny of goods routed through third countries in the region. Either way, tariff gaps can shift overnight while competitive suppliers and credible production records take years of sustained investment to build. Vietnam and Malaysia are at the center of that test. Both landed in “Tier 2” of an August White House transshipment watchlist as Chinese technology and component shipments surged. Outside analysts faulted the report’s broad trade arithmetic, but both countries’ heavy and rising reliance on imported inputs is real. A separate US Section 301 action on forced-labor imports, which took effect July 24 and covers 60 economies, shows that government commitments and company supply-chain records run on different tracks. The measure imposed additional duties of 10% on covered goods from Malaysia, one of 17 economies granted the lower rate for pledging to implement and enforce laws barring forced-labor imports — compared with 12.5% for Vietnam. A factory’s own documentation cannot change its country’s tariff tier, but exporters still need verifiable records to substantiate origin and sourcing claims. Vietnam’s export boom brings that domestic-supplier challenge into sharp and crucial focus. The country’s merchandise trade topped $1.01 trillion in the first 10 months of 2026, with foreign-invested plants generating 81.2% of exports. But those figures say little about domestic value added. The challenge is to turn that export scale into deeper domestic supplier networks. In that direction, Vietnam’s 2026-2035 supporting-industry program sets a 2030 localization target of 40-45% in priority sectors. Closing that local-foreign gap means separating two tasks that trade debates often blur: building local value and documenting supply chains. Deeper domestic manufacturing strengthens competitiveness, keeps more income and know-how at home, and supports local origin where substantial transformation rules apply. Supply-chain documentation serves a different purpose, helping firms substantiate how goods are made and where inputs come from. Neither guarantees protection from unilateral tariffs, yet both underpin durable market access. Two recent developments show how leading Vietnamese firms are investing in those capabilities. Early this month, tech group FPT began trial operations at a locally owned semiconductor testing and packaging facility in Bac Ninh, designed up to 300 million chips a year. Its initial phase focuses on functionality, quality and reliability testing, with Vietnamese engineers writing chip-specific test programs, a first testing order expected from a South Korean partner and hands-on production-line training starting in December before expanding into packaging technologies. Days later, Japanese trading house Sojitz signed a preliminary agreement to acquire 5% of Masan High-Tech Materials, weeks after US tungsten processor Elmet bought a 4.99% stake alongside a multi-year supply contract worth roughly $1.5 billion. Together, those partnerships reflect the commercial appeal of refining tungsten inside Vietnam under international quality standards for North American and Japanese technology supply chains. Smaller domestic suppliers face a steeper climb than conglomerates like FPT and Masan. Upgrading machinery and quality-management systems requires substantial capital with long payback periods, while collateral-based bank lending limits smaller firms’ access to long-term credit. Meeting multinational buyers’ technical thresholds can therefore remain out of reach even when orders are available. Economic-zone policy can help close the financing and capability gap when incentives are tied to supplier upgrading. Under Malaysia’s incentive scheme for the Johor-Singapore Special Economic Zone, manufacturers seeking the preferential 5% corporate tax rate must run at least one local vendor-development program and collaborate with Malaysian universities, vocational centers or technical certification bodies. Vietnam’s northern port hub of Hai Phong has a timely chance to apply that lesson in its newly launched 6,292-hectare Free Trade Zone and 5,300-hectare Specialized Economic Zone targeting artificial intelligence, robotics and research. Both zones aim to attract global manufacturers and foster technology transfer to domestic firms. Hanoi and Hai Phong should make structured vendor training, vocational partnerships and testing support explicit, measurable parts of their incentive strategy. When Vietnamese President To Lam accepts the handover in Shenzhen for Vietnam to host APEC in 2027, Hanoi can build on this domestic effort by pushing for regional cooperation on product testing, certification, supplier training and supply-chain traceability. Pairing long-term credit for small suppliers with zone incentives tied to training and R&D will not insulate exporters from every tariff swing. But it will build capabilities and records that outlast summit politics. Tran Hoang Tu Linh is a lecturer in law at Ho Chi Minh City University of Law, Vietnam and a PhD candidate at Singapore Management University (SMU).