The Trump administration has added a further four Chinese firms to its blacklist of companies allegedly owned or controlled by the Chinese military.
According to Reuters, Thursday local time, the U.S. Department of Defense included China's leading chipmaker SMIC and oil giant CNOOC in the blacklist.
China International Engineering Consulting Corporation and China Construction Technology were also designated as alleged companies with links to the military, making a list of 35 affected Chinese companies.
U.S. investors are prevented from purchasing securities of blacklisted firms, starting next year.
Experts say the move was likely intended to heighten tensions with Beijing ahead of the transition to Biden administration.