The stakes are significant, highlighting how the US-China tech rivalry is now snarling even approved trade, leaving the world's most valuable company and dominant chipmaker caught between dueling national priorities. The US has cleared about 10 Chinese firms to buy Nvidia's second-most powerful AI chip, the H200, but not a single delivery has been made so far, three people familiar with the matter said, leaving a major technology deal in limbo as CEO Jensen Huang seeks a breakthrough in China