China has escalated its trade and technology dispute with the United States by banning purchases of products from 46 American companies for government procurement. The list of blocked firms includes major defense contractor Lockheed Martin, signaling a direct response to US restrictions. This move represents a significant hardening of stance from Beijing amid ongoing concerns over national security and technological competition. The Chinese government has not released detailed reasons for each company’s inclusion on the list, but the action is widely interpreted as retaliation for US export controls and sanctions. This latest development further complicates the already strained relationship between the world’s two largest economies. Analysts predict potential disruptions to supply chains and increased pressure on American businesses operating in China. The ban underscores the deepening rivalry and the risk of further escalation in the tech war.