BEIJING — U.S. chip giant Nvidia

has yet to recoup its lost sales in China, despite Washington easing some restrictions, and the company is sounding the alarm about rising competition from Chinese rivals.

“While small amounts of H200 [semiconductor] products for China-based customers were approved by the US government, we have yet to generate any revenue,” Nvidia’s CFO Colette M. Kress said on an earnings call Wednesday local time, according to a FactSet transcript.

“We do not know whether any imports will be allowed into China,” she said.

China once accounted for at least one-fifth of Nvidia’s data center revenue.