Demand in China has begun surging for a business that, in theory, shouldn't exist: the repair of advanced Nvidia artificial intelligence chipsets that the U.S. has banned the export of to its trade and tech rival.

Jensen Huang pulled off something of a political miracle this week for Nvidia shareholders. As the U.S. and China continue to growl at one another over tariffs and other elements of the trade war between the two countries and the race to attain AI superiority, Huang convinced Donald Trump to lift the ban on select AI chip sales to China.

Nvidia's advanced artificial intelligence chips worth at least $1 billion were smuggled to China in the three months after Washington tightened chip export controls, the Financial Times reported on Thursday.