The Trump administration is poised to add China’s top chipmaker SMIC and national offshore oil and gas producer CNOOC to a blacklist of alleged Chinese military companies, according to a document and sources, curbing their access to U.S. investors and escalating tensions with Beijing weeks before President-elect Joe Biden takes office.

Reuters reported earlier this month that the Department of Defense was planning to designate four more Chinese companies as owned or controlled by the Chinese military, bringing the number of Chinese companies affected to 35.

It was not immediately clear when the new tranche, would be published in the Federal Register. But the list comprises China Construction Technology Co Ltd and China International Engineering Consulting Corp, in addition to Semiconductor Manufacturing International Corp (SMIC) and China National Offshore Oil Corp (CNOOC), according to the document and three sources.

The Defense Department (DOD) did not respond to a request for comment.