STORY: The U.S. has cleared around 10 Chinese firms to buy Nvidia’s second-most powerful AI chip, the H200.That’s according to three sources speaking to Reuters.But they said not a single delivery has been made so far.It’s left a major tech deal in limbo as CEO Jensen Huang looks for a breakthrough in China this week.A source said Huang joined the US delegation to Beijing after a late invitation from Donald Trump.The U.S. President picked him up in Alaska en route to a summit with Chinese President Xi Jinping.Huang’s presence raised hopes the trip could finally unlock stalled efforts to sell the H200 chips in China.Sources said the U.S. Commerce Department has approved around 10 Chinese companies to buy the H200.Those firm include Alibaba, Tencent, ByteDance and JD.com, and some distributors like Lenovo and Foxconn.The sources added buyers can buy either directly from Nvidia or through those intermediaries.And each approved customer can purchase up to 75,000 chips under the U.S. licensing terms.A spokesperson for the U.S. Department of Commerce declined to comment.Chinese authorities didn’t respond to requests for comment either.Huang told state broadcaster CCTV on Thursday he hoped Trump and Xi would build on their good relationship during talks in Beijing.One source said deals have stalled despite U.S. approval as Chinese firms have…