Moore Threads rose 6.9%, Shanghai Biren Technology gained 6.7%, Cambricon Technology rallied 9.8% and MetaX climbed 7.9%. The gains came after The Wall Street Journal reported that Nvidia’s board was preparing to oust Chief Executive Jensen Huang over two alleged extramarital affairs, one involving a suspected Chinese spy and another an employee.

Analysts said the allegations could lead U.S. politicians to examine Nvidia’s China ties, its compliance with export controls and its internal safeguards more closely. Further restrictions on Nvidia’s business in China could open more opportunities for Chinese suppliers, as Beijing’s drive for technological self-reliance has supported demand for locally made semiconductors.

Democratic Sens. Elizabeth Warren and Chris Coons have asked the Trump administration to preserve all documents related to Nvidia’s chip exports to China and Huang’s alleged affair with a suspected Chinese intelligence asset. Such requests often precede formal congressional investigations.