blacklisting dozens of Chinese firms, including the country's top chipmaker SMIC and Chinese drone manufacturer SZ DJI Technology Co Ltd, and over 60 other Chinese companies "to protect US national security.""This action stems from China’s military-civil fusion doctrine and evidence of activities between SMIC and entities of concern in the Chinese military-industrial complex," the Commerce Department announced in a statement.The Commerce Department will "not allow advanced US technology to help build the military of an increasingly belligerent adversary," Secretary Wilbur Ross said in a statement.The department also said it was adding the world's biggest drone company DJI to the list along with AGCU Scientech; China National Scientific.