China sanctioned 20 U.S. defense companies, including the St. Louis operations of Boeing's defense unit.

The sanctions directly retaliate against the $11 billion U.S. arms package recently approved for Taiwan, which China considers its territory.

The punitive measures prohibit the sanctioned entities from conducting business with Chinese organizations and freeze any assets they hold in China. This action is part of a broader effort targeting U.S. defense firms and their executives involved in the Taiwan arms sales.