Beijing has imposed sanctions on two US defense companies, Lockheed Martin and Northrop Grumman, for their involvement in supplying arms to Taiwan.
Under the Taiwan Relations Act, the US Congress is required to provide weapons to Taiwan for its defense as a self-governing democracy.
China strongly opposes the US government's decision to arm Taiwan, considering it a threat to its sovereignty and security interests.
Lockheed Martin was the main contractor in arms sales to Taiwan, and Northrop Grumman has participated in sales on multiple occasions.
