The two countries continue working on US concerns over supply-chain shortages tied to rare earths and other critical minerals.
The startup is developing small, light motors that use no rare-earth magnets, targeting drones, fans, and robots.
Decades of relying on cheaper imports left the US dependent on China for critical rare earth processing capacity.
Uneven follow-through on commitments involving soybeans, aircraft and rare earths points to a delicate détente between Washington and Beijing, CNBC reports.
Rafael Moreno, whose company has opened a demonstration plant in Brazil, said the market is 'nervous' ahead of the leaders' meeting, the Guardian reported.