US stock market closing: USA launches a full-scale trade war, stock indices fluctuate dramatically and collectively fall.

① Most China Concept Stocks closed up, the Nasdaq China Golden Dragon Index rose by 1.95%; ② Apple launched the iPad Air with M3 chip and new Magic Keyboard; ③ Canada announced it will impose a 25% tariff on US commodities worth 155 billion Canadian dollars; ④ The US Secretary of Commerce stated that Trump may cut tariffs on both the USA and Mexico tomorrow.

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