Nvidia and AMD have agreed to give the U.S. government 15% of revenue from sales to China of advanced computer chips, a U.S. official said on Sunday, in an unusual move likely to faze American companies.

Nvidia and AMD have agreed to pay the US government 15% of their revenues from semiconductor sales to China in exchange for export licenses, an unprecedented quid pro quo arrangement aimed at solidifying America’s AI business dominance while maintaining trade ties with China.