Electric motors usually feature rare-earths metals to run. But WSJ tech columnist Christopher Mims writes about a new start up that excludes them, which could begin to help end the American auto industry’s reliance on China. Then, Chinese automakers are also reliant on US imports for critical chips to power their cars. WSJ deputy Beijing bureau chief Yoko Kubota explores how the trade war has shown both US and Chinese tech industry vulnerabilities to the long-running spat.
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