Group 1 - The Chinese government has filed a lawsuit against the U.S. in the WTO regarding the imposition of "reciprocal tariffs," claiming it violates WTO rules and undermines the multilateral trade system [2] - The Chinese government has added 11 U.S. companies to the "unreliable entity list" due to their military technology cooperation with Taiwan, which is seen as a threat to China's national security [3] - A total of 16 U.S. entities have been placed on an export control list to protect national security and fulfill international obligations, prohibiting the export of dual-use items to these entities [4] Group 2 - The Chinese government has implemented export controls on seven categories of medium and heavy rare earth materials, citing the need to safeguard national security and fulfill international obligations [5][6] - The Ministry of Commerce has initiated an industry competitiveness investigation into imported medical CT tubes, responding to domestic industry requests due to the adverse impact of imports on local production [7]