The Biden administration is refining rules aimed at keeping advanced chips and manufacturing gear out of China, seeking to close loopholes that might help its geopolitical rival gain cutting-edge technologies.

The latest regulations are an attempt to streamline export curbs announced last October, according to people familiar with the matter. The new rules will strengthen controls on selling graphics chips for artificial intelligence applications and advanced chipmaking equipment to Chinese firms, said the people, who asked not to be identified because the information isn’t yet public.

The move will set new guidelines for companies like Nvidia Corp., which has been selling a weakened version of its flagship processor to Chinese companies to abide by the current rules. The tighter standards may make those kinds of workarounds more difficult for American exporters.