The United States blacklisted seven Chinese supercomputing companies this week for allegedly conducting activities contrary to U.S. national security or foreign policy, contending that they are assisting the People’s Liberation Army with a variety of activities, including China’s weapons of mass destruction efforts.

The Commerce Department announced that the Bureau of Industry and Security had placed the seven Chinese companies on the U.S. Entity List. The U.S. says that the companies (Tianjin Phytium Information Technology, Shanghai High-Performance Integrated Circuit Design Center, Sunway Microelectronics, the National Supercomputing Center Jinan, the National Supercomputing Center Shenzhen, the National Supercomputing Center Wuxi, and the National Supercomputing Center Zhengzhou) are “involved with building supercomputers used by China’s military actors, its destabilizing military modernization efforts, and/or weapons of mass destruction programs.”