Firms linked to businesswoman Alice Huang have invested in Chinese AI firm DeepSeek and pledged to supply it with Nvidia's Blackwell chips.
Singapore has warned her and banned her from returning after finding she gave investigators false information. Police say she tried to play down her role at Megaspeed, a data centre firm that is still under investigation over suspected false declarations on server purchases.
Her ties to Nvidia CEO Jensen Huang go back several years, to when her husband, investor Kang Weigh, brought them together.
At a White House meeting, Treasury Secretary Scott Bessent challenged Commerce Secretary Howard Lutnick over the government's continued delay in blacklisting Megaspeed.
The company is accused of illegally routing US-made AI chips to China.
Three House committee leaders want NVIDIA CEO Jensen Huang to attend a private briefing on November 18.
They want answers on NVIDIA's espionage safeguards and his past dealings with Alice Huang, a Megaspeed executive under US surveillance for allegedly passing technology to China.
A security research firm found that 32 B300 GPUs, which are on the US export control list, appear to be deployed at China Telecom. Jensen Huang has until November 11 to accept the date or propose another.