A tentative deal reached in London gives Beijing continued leverage in trade negotiations.

China will place a six-month limit on rare earth export licenses granted to U.S. automakers and other manufacturers, people familiar with the matter told The Wall Street Journal, which would give Beijing leverage if tensions with the U.

Automakers are having to find ways to work around the cutback, such as using older technology that is more costly and less efficient, moving some parts manufacture to China, removing certain special features that need magnets such as adjustable seats and high-end speaker systems,