The pyrotechnics industry relies heavily on Chinese fireworks imports and warns that this could be the last big bang Fourth of July.

The United States and Vietnam have agreed on a two-layer tariff system designed to stop goods routed through Vietnam, often to dodge US duties, from entering American markets. Under the plan, items genuinely produced in Vietnam face a 20% duty,

Washington has agreed to lower its threatened 46 percent tariff on imports from Vietnam in return for increased access to the Vietnamese market.