It sounds like a lazy stereotype, so we ran the numbers. If anything, the stereotype turns out to be an understatement.
Fireworks are a Chinese invention, full stop. Gunpowder was packed into bamboo tubes in China more than a thousand years ago, centuries before the technology drifted west along the trade routes to the Arab world and, later, to Europe.
That head start never really ended. The craft concentrated in a handful of towns, most famously Liuyang in Hunan province, which still bills itself as the fireworks capital of the world.
Today the dominance is almost comic. The overwhelming majority of the fireworks set off anywhere on Earth, on any country's national holiday, were made in China and shipped out by the container load.
So next time someone says the Chinese love fireworks, you can tell them it is not a stereotype. It is a thousand-year supply chain.