The world's two largest economies are each other's main rival and one of each other's main customers. The United States is trying to keep its lead in technology, finance and military power; China is trying to close the gap and to end its dependence on American technology and the dollar. They fight with tariffs, export bans, blacklists and subsidies rather than weapons, and every few months their leaders meet to keep the contest from breaking the trade that both still need. Taiwan, where the rivalry could become a war, has its own page.
Where it stands · September 2026
A second meeting this year between the two presidents is being prepared; Beijing has threatened to cancel it if Washington approves new arms sales to Taiwan. The two are negotiating a reciprocal cut in tariffs, while Washington weighs new ones on goods it says China overproduces. Chinese rare earth firms have halted some shipments to the United States. Xi Jinping has spent the month at summits of the non-Western groupings, proposing among other things a shared open-source zone for artificial intelligence.
What the dispute is about
Who leads. The United States has been the largest economy and the strongest military power for longer than anyone alive can remember, and the system of trade and finance was built around it. China is the first rival in a century large enough to change that.
Technology. Whoever leads in chips, artificial intelligence and clean energy will lead in both wealth and weapons. America restricts what China can buy; China restricts the minerals everyone needs to make it.
The terms of trade. China sells the world far more than it buys. Americans call the surplus the product of subsidy and closed markets; Chinese call it the product of work and investment.
Each side says it does not seek to change the other's system. Neither believes it.