Nvidia has reportedly paused production activities tied to its H20 data center AI GPUs for China as Beijing intensifies national-security scrutiny, clouding a long-anticipated reentry into the market. Multiple suppliers have been asked to suspend work related to the H20, Nvidia's made-for-China accelerator designed to meet U.S. export rules. The pause arrives shortly after Washington signaled it would grant export licenses for the H20, reversing an earlier halt that triggered unsold inventory write downs at Nvidia. The H20 is Nvidia's linchpin for retaining a foothold in the worlds second-largest AI market; any prolonged disruption has material revenue and ecosystem consequences.