Former WSJ China tech correspondent Liza Lin breaks down why rare earths are China's most powerful card in the trade war: it's not about who can dig the stuff out of the ground — it's who can process it. China owns that step, and that's the real chokehold. Her read on why both sides wanted a longer truce: the US wants rare-earth trade flowing smoothly, while China needs breathing room to find its next economic driver. #RareEarths #USChina #TradeWar #AI #HumanoidRobots #chinatech #china